./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8 --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 aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 --- 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-e04fb08 [2022-11-16 11:49:07,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:49:07,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:49:07,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:49:07,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:49:07,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:49:07,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:49:07,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:49:07,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:49:07,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:49:07,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:49:07,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:49:07,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:49:07,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:49:07,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:49:07,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:49:07,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:49:07,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:49:07,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:49:07,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:49:07,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:49:07,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:49:07,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:49:07,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:49:07,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:49:07,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:49:07,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:49:07,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:49:07,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:49:07,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:49:07,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:49:07,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:49:07,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:49:07,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:49:07,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:49:07,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:49:07,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:49:07,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:49:07,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:49:07,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:49:07,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:49:07,209 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:49:07,249 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:49:07,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:49:07,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:49:07,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:49:07,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:49:07,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:49:07,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:49:07,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:49:07,260 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:49:07,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:49:07,261 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:49:07,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:49:07,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:49:07,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:49:07,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:49:07,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:49:07,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:49:07,263 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:49:07,264 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:49:07,264 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:49:07,264 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:49:07,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:49:07,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:49:07,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:49:07,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:49:07,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:49:07,274 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:49:07,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:49:07,275 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:49:07,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:49:07,275 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:49:07,275 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:49:07,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:49:07,276 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_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa34b6970b46b2c3f1bda76d086482188f10831dd44cba913e5171769601c6f3 [2022-11-16 11:49:07,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:49:07,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:49:07,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:49:07,719 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:49:07,720 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:49:07,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2022-11-16 11:49:07,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/data/fd86288e4/2e52d8044a1a4607a547ada8500120b3/FLAG411e0d7fb [2022-11-16 11:49:08,464 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:49:08,465 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2022-11-16 11:49:08,477 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/data/fd86288e4/2e52d8044a1a4607a547ada8500120b3/FLAG411e0d7fb [2022-11-16 11:49:08,799 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/data/fd86288e4/2e52d8044a1a4607a547ada8500120b3 [2022-11-16 11:49:08,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:49:08,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:49:08,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:49:08,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:49:08,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:49:08,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:49:08" (1/1) ... [2022-11-16 11:49:08,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68eec182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:08, skipping insertion in model container [2022-11-16 11:49:08,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:49:08" (1/1) ... [2022-11-16 11:49:08,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:49:08,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:49:09,093 WARN L229 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_88428b31-8f5a-4a0f-bb56-63180a4f28ec/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2022-11-16 11:49:09,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:49:09,128 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:49:09,142 WARN L229 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_88428b31-8f5a-4a0f-bb56-63180a4f28ec/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c[490,503] [2022-11-16 11:49:09,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:49:09,171 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:49:09,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09 WrapperNode [2022-11-16 11:49:09,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:49:09,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:49:09,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:49:09,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:49:09,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,215 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-11-16 11:49:09,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:49:09,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:49:09,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:49:09,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:49:09,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,250 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:49:09,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:49:09,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:49:09,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:49:09,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (1/1) ... [2022-11-16 11:49:09,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:49:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:09,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:49:09,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:49:09,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:49:09,365 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 11:49:09,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 11:49:09,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:49:09,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:49:09,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:49:09,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:49:09,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:49:09,466 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:49:09,469 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:49:09,740 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:49:09,748 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:49:09,748 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:49:09,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:49:09 BoogieIcfgContainer [2022-11-16 11:49:09,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:49:09,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:49:09,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:49:09,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:49:09,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:49:08" (1/3) ... [2022-11-16 11:49:09,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57271d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:49:09, skipping insertion in model container [2022-11-16 11:49:09,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:49:09" (2/3) ... [2022-11-16 11:49:09,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57271d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:49:09, skipping insertion in model container [2022-11-16 11:49:09,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:49:09" (3/3) ... [2022-11-16 11:49:09,762 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2022-11-16 11:49:09,785 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:49:09,785 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:49:09,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:49:09,900 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;@5097421, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:49:09,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:49:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:49:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:49:09,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:09,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:09,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:09,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2022-11-16 11:49:09,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:09,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144851183] [2022-11-16 11:49:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:09,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:10,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:10,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144851183] [2022-11-16 11:49:10,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 11:49:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855814900] [2022-11-16 11:49:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:10,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:10,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:10,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:10,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:49:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 11:49:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:49:10,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:49:10,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855814900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:10,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:10,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:49:10,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184629310] [2022-11-16 11:49:10,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:10,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:49:10,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:49:10,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:49:10,360 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:49:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:10,436 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2022-11-16 11:49:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:49:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-11-16 11:49:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:10,448 INFO L225 Difference]: With dead ends: 65 [2022-11-16 11:49:10,448 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 11:49:10,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:49:10,472 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:10,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:49:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 11:49:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-16 11:49:10,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:49:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-16 11:49:10,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2022-11-16 11:49:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:10,554 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-16 11:49:10,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:49:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-16 11:49:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:49:10,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:10,559 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:10,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:10,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 11:49:10,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2022-11-16 11:49:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:10,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431042659] [2022-11-16 11:49:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:10,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:10,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:10,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919598567] [2022-11-16 11:49:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:10,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:10,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:10,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:10,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:49:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:49:10,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:49:11,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:49:11,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:11,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431042659] [2022-11-16 11:49:11,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919598567] [2022-11-16 11:49:11,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919598567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:11,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:11,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:49:11,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569833975] [2022-11-16 11:49:11,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:11,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:49:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:11,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:49:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:49:11,179 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:49:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:11,225 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-11-16 11:49:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:49:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-16 11:49:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:11,229 INFO L225 Difference]: With dead ends: 40 [2022-11-16 11:49:11,229 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 11:49:11,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:49:11,231 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:11,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:49:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 11:49:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-16 11:49:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:49:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-11-16 11:49:11,253 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2022-11-16 11:49:11,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:11,255 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-11-16 11:49:11,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:49:11,255 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-11-16 11:49:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:49:11,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:11,257 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:11,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:11,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:11,464 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2022-11-16 11:49:11,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:11,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502140436] [2022-11-16 11:49:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:11,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:11,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776941208] [2022-11-16 11:49:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:11,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:11,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:11,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:11,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:49:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:11,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:49:11,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:49:11,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:49:11,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:11,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502140436] [2022-11-16 11:49:11,775 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:11,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776941208] [2022-11-16 11:49:11,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776941208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:11,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:11,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-16 11:49:11,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928337427] [2022-11-16 11:49:11,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:11,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:49:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:49:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:49:11,779 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:49:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:11,951 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-11-16 11:49:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:49:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-16 11:49:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:11,956 INFO L225 Difference]: With dead ends: 49 [2022-11-16 11:49:11,956 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 11:49:11,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:49:11,961 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:11,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 92 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:49:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 11:49:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-11-16 11:49:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:49:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-11-16 11:49:11,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2022-11-16 11:49:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:11,985 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-11-16 11:49:11,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:49:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-11-16 11:49:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:49:11,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:11,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:12,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:12,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:12,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:12,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2022-11-16 11:49:12,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:12,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647491640] [2022-11-16 11:49:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:12,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:12,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:12,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797621071] [2022-11-16 11:49:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:12,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:12,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:49:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:12,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:49:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:49:12,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:49:12,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:12,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647491640] [2022-11-16 11:49:12,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:12,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797621071] [2022-11-16 11:49:12,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797621071] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:12,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:49:12,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-16 11:49:12,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353627943] [2022-11-16 11:49:12,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:12,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:49:12,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:49:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:49:12,709 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:49:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:12,786 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-16 11:49:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:49:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-11-16 11:49:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:12,789 INFO L225 Difference]: With dead ends: 39 [2022-11-16 11:49:12,789 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 11:49:12,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:49:12,791 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:12,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 114 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:49:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 11:49:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-16 11:49:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:49:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-16 11:49:12,803 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2022-11-16 11:49:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:12,804 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-16 11:49:12,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:49:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-16 11:49:12,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:49:12,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:12,806 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:12,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:13,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:13,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:13,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2022-11-16 11:49:13,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:13,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572479257] [2022-11-16 11:49:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:13,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:13,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539796612] [2022-11-16 11:49:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:13,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:13,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:13,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:13,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:49:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:13,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:49:13,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:49:13,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:49:13,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:13,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572479257] [2022-11-16 11:49:13,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:13,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539796612] [2022-11-16 11:49:13,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539796612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:13,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:13,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:49:13,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832220922] [2022-11-16 11:49:13,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:13,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:49:13,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:13,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:49:13,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:49:13,248 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:49:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:13,331 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-11-16 11:49:13,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:49:13,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-16 11:49:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:13,334 INFO L225 Difference]: With dead ends: 62 [2022-11-16 11:49:13,336 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 11:49:13,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:49:13,338 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:13,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:49:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 11:49:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-16 11:49:13,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:49:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-16 11:49:13,355 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2022-11-16 11:49:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:13,356 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-16 11:49:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 11:49:13,357 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-16 11:49:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:49:13,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:13,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:13,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:13,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:13,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2022-11-16 11:49:13,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:13,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645480063] [2022-11-16 11:49:13,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:13,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:13,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:13,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268774994] [2022-11-16 11:49:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:13,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:13,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:13,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:13,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:49:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:13,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:49:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:49:14,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:49:14,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645480063] [2022-11-16 11:49:14,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268774994] [2022-11-16 11:49:14,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268774994] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:14,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:49:14,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-16 11:49:14,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756454309] [2022-11-16 11:49:14,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:14,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:49:14,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:49:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:49:14,282 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:49:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:14,399 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-11-16 11:49:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:49:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-11-16 11:49:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:14,401 INFO L225 Difference]: With dead ends: 53 [2022-11-16 11:49:14,401 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 11:49:14,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:49:14,403 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:14,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:49:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 11:49:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-11-16 11:49:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 11:49:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-11-16 11:49:14,420 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2022-11-16 11:49:14,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:14,420 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-11-16 11:49:14,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:49:14,421 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-11-16 11:49:14,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:49:14,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:14,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:14,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:14,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:14,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:14,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:14,630 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2022-11-16 11:49:14,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:14,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694687499] [2022-11-16 11:49:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:14,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:14,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:14,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578520964] [2022-11-16 11:49:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:14,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:14,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:14,661 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:14,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:49:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:14,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:49:14,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:49:15,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:49:15,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694687499] [2022-11-16 11:49:15,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578520964] [2022-11-16 11:49:15,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578520964] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:15,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:49:15,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-16 11:49:15,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898998089] [2022-11-16 11:49:15,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:15,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:49:15,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:49:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:49:15,195 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:49:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:15,287 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-11-16 11:49:15,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:49:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-11-16 11:49:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:15,290 INFO L225 Difference]: With dead ends: 57 [2022-11-16 11:49:15,291 INFO L226 Difference]: Without dead ends: 55 [2022-11-16 11:49:15,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:49:15,294 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:15,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:49:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-16 11:49:15,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-11-16 11:49:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 11:49:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-11-16 11:49:15,327 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2022-11-16 11:49:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:15,330 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-11-16 11:49:15,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:49:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-11-16 11:49:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:49:15,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:15,341 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:15,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:15,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:15,547 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:15,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2022-11-16 11:49:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:15,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132415090] [2022-11-16 11:49:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:15,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826906883] [2022-11-16 11:49:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:15,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:15,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:15,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:15,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:49:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:49:15,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 11:49:15,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:16,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132415090] [2022-11-16 11:49:16,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826906883] [2022-11-16 11:49:16,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826906883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:16,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:49:16,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-16 11:49:16,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929427222] [2022-11-16 11:49:16,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:16,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:49:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:49:16,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:49:16,676 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:49:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:16,905 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-11-16 11:49:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:49:16,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-16 11:49:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:16,907 INFO L225 Difference]: With dead ends: 61 [2022-11-16 11:49:16,907 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 11:49:16,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:49:16,908 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:16,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:49:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 11:49:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-11-16 11:49:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 11:49:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-11-16 11:49:16,927 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2022-11-16 11:49:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:16,927 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-11-16 11:49:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:49:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-11-16 11:49:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:49:16,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:16,929 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:16,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:17,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:49:17,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:17,136 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2022-11-16 11:49:17,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:17,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444822167] [2022-11-16 11:49:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:17,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:17,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:17,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931031767] [2022-11-16 11:49:17,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:17,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:17,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:17,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:49:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:17,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:49:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 11:49:17,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 11:49:17,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:17,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444822167] [2022-11-16 11:49:17,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:17,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931031767] [2022-11-16 11:49:17,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931031767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:17,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:17,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-16 11:49:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362985114] [2022-11-16 11:49:17,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:49:17,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:49:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:49:17,484 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 11:49:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:17,815 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2022-11-16 11:49:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:49:17,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2022-11-16 11:49:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:17,824 INFO L225 Difference]: With dead ends: 211 [2022-11-16 11:49:17,825 INFO L226 Difference]: Without dead ends: 203 [2022-11-16 11:49:17,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:49:17,829 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 113 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:17,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 180 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:49:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-16 11:49:17,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2022-11-16 11:49:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-16 11:49:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2022-11-16 11:49:17,930 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2022-11-16 11:49:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:17,933 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2022-11-16 11:49:17,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 11:49:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2022-11-16 11:49:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 11:49:17,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:17,940 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:17,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:18,153 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:18,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:18,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2022-11-16 11:49:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:18,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328421691] [2022-11-16 11:49:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:18,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:18,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:18,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407715432] [2022-11-16 11:49:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:18,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:18,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:18,193 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:18,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:49:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:18,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:49:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 11:49:18,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 11:49:18,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:18,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328421691] [2022-11-16 11:49:18,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:18,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407715432] [2022-11-16 11:49:18,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407715432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:18,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:18,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-16 11:49:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444353027] [2022-11-16 11:49:18,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:18,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:49:18,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:18,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:49:18,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:49:18,540 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 11:49:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:18,929 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2022-11-16 11:49:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:49:18,930 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2022-11-16 11:49:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:18,935 INFO L225 Difference]: With dead ends: 279 [2022-11-16 11:49:18,935 INFO L226 Difference]: Without dead ends: 259 [2022-11-16 11:49:18,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:49:18,939 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 70 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:18,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 286 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:49:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-16 11:49:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2022-11-16 11:49:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-11-16 11:49:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2022-11-16 11:49:19,016 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2022-11-16 11:49:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:19,018 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2022-11-16 11:49:19,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 11:49:19,019 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2022-11-16 11:49:19,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 11:49:19,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:19,022 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:19,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:19,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:49:19,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2022-11-16 11:49:19,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:19,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511768161] [2022-11-16 11:49:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:19,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:19,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811171282] [2022-11-16 11:49:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:19,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:19,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:19,257 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:19,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:49:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:19,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:49:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 11:49:19,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 11:49:19,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511768161] [2022-11-16 11:49:19,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811171282] [2022-11-16 11:49:19,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811171282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:19,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:19,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-16 11:49:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930845331] [2022-11-16 11:49:19,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:19,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:49:19,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:49:19,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:49:19,559 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 11:49:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:19,832 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2022-11-16 11:49:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:49:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2022-11-16 11:49:19,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:19,837 INFO L225 Difference]: With dead ends: 344 [2022-11-16 11:49:19,838 INFO L226 Difference]: Without dead ends: 248 [2022-11-16 11:49:19,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:49:19,841 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 75 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:19,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 252 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:49:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-16 11:49:19,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2022-11-16 11:49:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-11-16 11:49:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2022-11-16 11:49:19,908 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2022-11-16 11:49:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:19,910 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2022-11-16 11:49:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-16 11:49:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2022-11-16 11:49:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:49:19,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:19,911 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:19,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:49:20,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2022-11-16 11:49:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:20,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207302727] [2022-11-16 11:49:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:20,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:20,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316814293] [2022-11-16 11:49:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:20,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:20,152 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:20,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:49:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:49:20,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 11:49:20,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 11:49:20,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:20,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207302727] [2022-11-16 11:49:20,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:20,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316814293] [2022-11-16 11:49:20,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316814293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:20,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:20,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2022-11-16 11:49:20,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749851033] [2022-11-16 11:49:20,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:20,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:49:20,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:49:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:49:20,665 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-16 11:49:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:21,223 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2022-11-16 11:49:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:49:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2022-11-16 11:49:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:21,228 INFO L225 Difference]: With dead ends: 330 [2022-11-16 11:49:21,228 INFO L226 Difference]: Without dead ends: 324 [2022-11-16 11:49:21,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:49:21,230 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 33 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:21,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 279 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:49:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-16 11:49:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-11-16 11:49:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-16 11:49:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2022-11-16 11:49:21,331 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2022-11-16 11:49:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:21,332 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2022-11-16 11:49:21,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-16 11:49:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2022-11-16 11:49:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:49:21,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:21,334 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:21,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:21,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:21,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2022-11-16 11:49:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:21,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248333020] [2022-11-16 11:49:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:21,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:21,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:21,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446254828] [2022-11-16 11:49:21,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:49:21,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:21,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:21,557 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:21,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:49:21,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:49:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:49:21,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 11:49:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 11:49:22,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:26,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:26,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248333020] [2022-11-16 11:49:26,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:26,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446254828] [2022-11-16 11:49:26,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446254828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:26,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:49:26,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-16 11:49:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296233200] [2022-11-16 11:49:26,794 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:26,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:49:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:26,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:49:26,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:49:26,796 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 11:49:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:27,685 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2022-11-16 11:49:27,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:49:27,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2022-11-16 11:49:27,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:27,688 INFO L225 Difference]: With dead ends: 315 [2022-11-16 11:49:27,688 INFO L226 Difference]: Without dead ends: 313 [2022-11-16 11:49:27,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:49:27,690 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 92 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:27,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 199 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:49:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-16 11:49:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2022-11-16 11:49:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-16 11:49:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2022-11-16 11:49:27,808 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2022-11-16 11:49:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:27,809 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2022-11-16 11:49:27,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 11:49:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2022-11-16 11:49:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 11:49:27,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:27,818 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:27,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:28,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:49:28,025 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:28,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:28,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2022-11-16 11:49:28,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:28,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768784328] [2022-11-16 11:49:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:28,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:28,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:28,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903929912] [2022-11-16 11:49:28,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:49:28,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:28,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:28,061 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:28,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:49:28,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:49:28,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:49:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 11:49:28,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 11:49:28,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:31,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768784328] [2022-11-16 11:49:31,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:31,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903929912] [2022-11-16 11:49:31,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903929912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:31,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:49:31,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-16 11:49:31,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665440118] [2022-11-16 11:49:31,368 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:31,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:49:31,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:31,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:49:31,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:49:31,370 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-16 11:49:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:32,506 INFO L93 Difference]: Finished difference Result 327 states and 404 transitions. [2022-11-16 11:49:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:49:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 74 [2022-11-16 11:49:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:32,509 INFO L225 Difference]: With dead ends: 327 [2022-11-16 11:49:32,509 INFO L226 Difference]: Without dead ends: 323 [2022-11-16 11:49:32,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:49:32,511 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:32,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 219 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:49:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-16 11:49:32,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2022-11-16 11:49:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 214 states have (on average 1.1822429906542056) internal successors, (253), 222 states have internal predecessors, (253), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-16 11:49:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 395 transitions. [2022-11-16 11:49:32,584 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 395 transitions. Word has length 74 [2022-11-16 11:49:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:32,585 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 395 transitions. [2022-11-16 11:49:32,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-16 11:49:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 395 transitions. [2022-11-16 11:49:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 11:49:32,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:32,587 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:32,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:32,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:32,794 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:32,795 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2022-11-16 11:49:32,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:32,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861367488] [2022-11-16 11:49:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:32,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:32,808 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:32,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499265971] [2022-11-16 11:49:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:32,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:32,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:32,811 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:32,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:49:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 11:49:32,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-16 11:49:33,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-16 11:49:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861367488] [2022-11-16 11:49:35,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:35,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499265971] [2022-11-16 11:49:35,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499265971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:35,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:35,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-16 11:49:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761027443] [2022-11-16 11:49:35,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:35,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:49:35,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:49:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:49:35,404 INFO L87 Difference]: Start difference. First operand 320 states and 395 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-16 11:49:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:52,036 INFO L93 Difference]: Finished difference Result 454 states and 601 transitions. [2022-11-16 11:49:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:49:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-11-16 11:49:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:52,040 INFO L225 Difference]: With dead ends: 454 [2022-11-16 11:49:52,041 INFO L226 Difference]: Without dead ends: 443 [2022-11-16 11:49:52,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:49:52,043 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 168 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:52,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 591 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-16 11:49:52,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-16 11:49:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 410. [2022-11-16 11:49:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 272 states have (on average 1.2316176470588236) internal successors, (335), 281 states have internal predecessors, (335), 103 states have call successors, (103), 34 states have call predecessors, (103), 34 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2022-11-16 11:49:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 539 transitions. [2022-11-16 11:49:52,188 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 539 transitions. Word has length 80 [2022-11-16 11:49:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:52,188 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 539 transitions. [2022-11-16 11:49:52,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-16 11:49:52,189 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 539 transitions. [2022-11-16 11:49:52,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 11:49:52,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:52,191 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:52,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 11:49:52,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:49:52,397 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2022-11-16 11:49:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646186541] [2022-11-16 11:49:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:52,421 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:52,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895136037] [2022-11-16 11:49:52,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:49:52,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:52,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:52,424 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:52,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:49:52,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:49:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:49:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:49:52,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-16 11:49:52,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:49:52,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646186541] [2022-11-16 11:49:52,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:52,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895136037] [2022-11-16 11:49:52,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895136037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:49:52,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:49:52,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:49:52,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796086296] [2022-11-16 11:49:52,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:49:52,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:49:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:49:52,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:49:52,570 INFO L87 Difference]: Start difference. First operand 410 states and 539 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 11:49:52,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:52,834 INFO L93 Difference]: Finished difference Result 623 states and 882 transitions. [2022-11-16 11:49:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:49:52,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2022-11-16 11:49:52,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:52,837 INFO L225 Difference]: With dead ends: 623 [2022-11-16 11:49:52,838 INFO L226 Difference]: Without dead ends: 448 [2022-11-16 11:49:52,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:49:52,840 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:52,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:49:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-16 11:49:52,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 405. [2022-11-16 11:49:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 265 states have (on average 1.230188679245283) internal successors, (326), 271 states have internal predecessors, (326), 105 states have call successors, (105), 34 states have call predecessors, (105), 34 states have return successors, (103), 99 states have call predecessors, (103), 103 states have call successors, (103) [2022-11-16 11:49:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 534 transitions. [2022-11-16 11:49:52,985 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 534 transitions. Word has length 96 [2022-11-16 11:49:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:52,985 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 534 transitions. [2022-11-16 11:49:52,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-16 11:49:52,986 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 534 transitions. [2022-11-16 11:49:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-16 11:49:52,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:52,988 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:52,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:53,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:49:53,188 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:49:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1718599493, now seen corresponding path program 1 times [2022-11-16 11:49:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:49:53,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032607987] [2022-11-16 11:49:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:53,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:49:53,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:49:53,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429644975] [2022-11-16 11:49:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:53,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:49:53,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:49:53,202 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:49:53,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:49:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 11:49:53,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-16 11:49:54,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-11-16 11:49:57,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:49:57,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032607987] [2022-11-16 11:49:57,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:49:57,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429644975] [2022-11-16 11:49:57,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429644975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:49:57,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:57,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-11-16 11:49:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323182905] [2022-11-16 11:49:57,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:57,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:49:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:49:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:49:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:49:57,190 INFO L87 Difference]: Start difference. First operand 405 states and 534 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-16 11:50:12,078 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 [] [2022-11-16 11:50:22,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:50:34,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:50:38,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:50:40,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:50:42,578 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 [] [2022-11-16 11:50:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:45,133 INFO L93 Difference]: Finished difference Result 494 states and 668 transitions. [2022-11-16 11:50:45,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:50:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 97 [2022-11-16 11:50:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:45,137 INFO L225 Difference]: With dead ends: 494 [2022-11-16 11:50:45,137 INFO L226 Difference]: Without dead ends: 492 [2022-11-16 11:50:45,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:50:45,139 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 202 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 207 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:45,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 301 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 926 Invalid, 6 Unknown, 0 Unchecked, 22.5s Time] [2022-11-16 11:50:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-16 11:50:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 468. [2022-11-16 11:50:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 305 states have (on average 1.2524590163934426) internal successors, (382), 312 states have internal predecessors, (382), 127 states have call successors, (127), 35 states have call predecessors, (127), 35 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-16 11:50:45,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 634 transitions. [2022-11-16 11:50:45,354 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 634 transitions. Word has length 97 [2022-11-16 11:50:45,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:45,354 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 634 transitions. [2022-11-16 11:50:45,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-16 11:50:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 634 transitions. [2022-11-16 11:50:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-16 11:50:45,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:45,356 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:45,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:45,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:50:45,557 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2022-11-16 11:50:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:45,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519580853] [2022-11-16 11:50:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:45,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:45,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:50:45,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581592628] [2022-11-16 11:50:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:45,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:45,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:45,570 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:45,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:50:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:45,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:50:45,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 11:50:45,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-16 11:50:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:46,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519580853] [2022-11-16 11:50:46,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:50:46,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581592628] [2022-11-16 11:50:46,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581592628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:46,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:50:46,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-11-16 11:50:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038568676] [2022-11-16 11:50:46,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:46,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:50:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:50:46,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:50:46,129 INFO L87 Difference]: Start difference. First operand 468 states and 634 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-16 11:50:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:47,099 INFO L93 Difference]: Finished difference Result 1087 states and 1505 transitions. [2022-11-16 11:50:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:50:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) Word has length 112 [2022-11-16 11:50:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:47,105 INFO L225 Difference]: With dead ends: 1087 [2022-11-16 11:50:47,106 INFO L226 Difference]: Without dead ends: 883 [2022-11-16 11:50:47,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:50:47,108 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 184 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:47,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 279 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:50:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-16 11:50:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 859. [2022-11-16 11:50:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 549 states have (on average 1.2058287795992715) internal successors, (662), 560 states have internal predecessors, (662), 234 states have call successors, (234), 75 states have call predecessors, (234), 75 states have return successors, (229), 223 states have call predecessors, (229), 229 states have call successors, (229) [2022-11-16 11:50:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1125 transitions. [2022-11-16 11:50:47,526 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1125 transitions. Word has length 112 [2022-11-16 11:50:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:47,527 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1125 transitions. [2022-11-16 11:50:47,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 8 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-16 11:50:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1125 transitions. [2022-11-16 11:50:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-16 11:50:47,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:47,530 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:47,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:47,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:50:47,736 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:50:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 2 times [2022-11-16 11:50:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:47,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410360707] [2022-11-16 11:50:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:47,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:50:47,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689102729] [2022-11-16 11:50:47,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:50:47,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:47,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:47,754 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:47,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:50:47,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:50:47,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:50:47,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 11:50:47,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-16 11:50:49,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-16 11:50:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:52,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410360707] [2022-11-16 11:50:52,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:50:52,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689102729] [2022-11-16 11:50:52,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689102729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:52,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:50:52,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-11-16 11:50:52,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522192505] [2022-11-16 11:50:52,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:52,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:50:52,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:52,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:50:52,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:50:52,537 INFO L87 Difference]: Start difference. First operand 859 states and 1125 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2022-11-16 11:51:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:29,111 INFO L93 Difference]: Finished difference Result 1105 states and 1492 transitions. [2022-11-16 11:51:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-16 11:51:29,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2022-11-16 11:51:29,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:29,117 INFO L225 Difference]: With dead ends: 1105 [2022-11-16 11:51:29,117 INFO L226 Difference]: Without dead ends: 1103 [2022-11-16 11:51:29,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=651, Invalid=2541, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 11:51:29,119 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 226 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:29,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 795 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 15.1s Time] [2022-11-16 11:51:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2022-11-16 11:51:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1050. [2022-11-16 11:51:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 663 states have (on average 1.2292609351432882) internal successors, (815), 674 states have internal predecessors, (815), 302 states have call successors, (302), 84 states have call predecessors, (302), 84 states have return successors, (297), 291 states have call predecessors, (297), 297 states have call successors, (297) [2022-11-16 11:51:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1414 transitions. [2022-11-16 11:51:29,808 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1414 transitions. Word has length 115 [2022-11-16 11:51:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:29,809 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1414 transitions. [2022-11-16 11:51:29,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2022-11-16 11:51:29,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1414 transitions. [2022-11-16 11:51:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-16 11:51:29,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:29,812 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:29,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:30,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:30,020 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:30,020 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 3 times [2022-11-16 11:51:30,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:30,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055187782] [2022-11-16 11:51:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:30,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:51:30,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440295860] [2022-11-16 11:51:30,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:51:30,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:30,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:30,036 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:30,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:51:30,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:51:30,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:30,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 11:51:30,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 75 proven. 47 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-11-16 11:51:31,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 70 proven. 43 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-11-16 11:51:33,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:33,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055187782] [2022-11-16 11:51:33,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:51:33,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440295860] [2022-11-16 11:51:33,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440295860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:33,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:51:33,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2022-11-16 11:51:33,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550773458] [2022-11-16 11:51:33,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:33,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:51:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:33,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:51:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:51:33,182 INFO L87 Difference]: Start difference. First operand 1050 states and 1414 transitions. Second operand has 28 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-16 11:51:40,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:51:43,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:51:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:48,026 INFO L93 Difference]: Finished difference Result 1378 states and 1876 transitions. [2022-11-16 11:51:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:51:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) Word has length 119 [2022-11-16 11:51:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:48,038 INFO L225 Difference]: With dead ends: 1378 [2022-11-16 11:51:48,038 INFO L226 Difference]: Without dead ends: 1374 [2022-11-16 11:51:48,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=642, Invalid=2550, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 11:51:48,043 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 220 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:48,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 417 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-16 11:51:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-11-16 11:51:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1241. [2022-11-16 11:51:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 791 states have (on average 1.2402022756005058) internal successors, (981), 803 states have internal predecessors, (981), 349 states have call successors, (349), 101 states have call predecessors, (349), 100 states have return successors, (344), 336 states have call predecessors, (344), 344 states have call successors, (344) [2022-11-16 11:51:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1674 transitions. [2022-11-16 11:51:49,311 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1674 transitions. Word has length 119 [2022-11-16 11:51:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:49,312 INFO L495 AbstractCegarLoop]: Abstraction has 1241 states and 1674 transitions. [2022-11-16 11:51:49,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-16 11:51:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1674 transitions. [2022-11-16 11:51:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 11:51:49,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:49,316 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:49,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:49,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:49,522 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2022-11-16 11:51:49,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79251202] [2022-11-16 11:51:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:49,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:49,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:51:49,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675000274] [2022-11-16 11:51:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:49,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:49,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:49,561 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:49,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:51:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:51:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 11:51:49,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-11-16 11:51:50,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:50,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79251202] [2022-11-16 11:51:50,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:51:50,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675000274] [2022-11-16 11:51:50,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675000274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:50,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:51:50,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-11-16 11:51:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747395518] [2022-11-16 11:51:50,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:50,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:51:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:51:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:51:50,118 INFO L87 Difference]: Start difference. First operand 1241 states and 1674 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-11-16 11:51:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:51,791 INFO L93 Difference]: Finished difference Result 1291 states and 1728 transitions. [2022-11-16 11:51:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:51:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 129 [2022-11-16 11:51:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:51,799 INFO L225 Difference]: With dead ends: 1291 [2022-11-16 11:51:51,799 INFO L226 Difference]: Without dead ends: 1271 [2022-11-16 11:51:51,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 240 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:51:51,804 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 146 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:51,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 345 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:51:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-11-16 11:51:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1265. [2022-11-16 11:51:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 815 states have (on average 1.2184049079754602) internal successors, (993), 827 states have internal predecessors, (993), 349 states have call successors, (349), 101 states have call predecessors, (349), 100 states have return successors, (344), 336 states have call predecessors, (344), 344 states have call successors, (344) [2022-11-16 11:51:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1686 transitions. [2022-11-16 11:51:52,929 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1686 transitions. Word has length 129 [2022-11-16 11:51:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:52,929 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1686 transitions. [2022-11-16 11:51:52,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 10 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-11-16 11:51:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1686 transitions. [2022-11-16 11:51:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 11:51:52,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:52,933 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:52,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:53,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:53,139 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:51:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2022-11-16 11:51:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:53,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137738253] [2022-11-16 11:51:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:53,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:53,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:51:53,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082721642] [2022-11-16 11:51:53,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:51:53,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:53,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:53,159 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:53,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:51:53,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:51:53,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 11:51:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 35 proven. 58 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-16 11:51:54,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:52:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-11-16 11:52:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:02,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137738253] [2022-11-16 11:52:02,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:52:02,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082721642] [2022-11-16 11:52:02,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082721642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:52:02,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:52:02,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2022-11-16 11:52:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584329968] [2022-11-16 11:52:02,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:52:02,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:52:02,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:02,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:52:02,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:52:02,131 INFO L87 Difference]: Start difference. First operand 1265 states and 1686 transitions. Second operand has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2022-11-16 11:53:00,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:53:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:25,788 INFO L93 Difference]: Finished difference Result 1613 states and 2211 transitions. [2022-11-16 11:53:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 11:53:25,791 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 130 [2022-11-16 11:53:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:25,799 INFO L225 Difference]: With dead ends: 1613 [2022-11-16 11:53:25,799 INFO L226 Difference]: Without dead ends: 1593 [2022-11-16 11:53:25,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=1270, Invalid=5702, Unknown=0, NotChecked=0, Total=6972 [2022-11-16 11:53:25,803 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 431 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:25,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 1218 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 2174 Invalid, 0 Unknown, 0 Unchecked, 40.8s Time] [2022-11-16 11:53:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-11-16 11:53:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1413. [2022-11-16 11:53:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 906 states have (on average 1.2273730684326711) internal successors, (1112), 917 states have internal predecessors, (1112), 397 states have call successors, (397), 110 states have call predecessors, (397), 109 states have return successors, (392), 385 states have call predecessors, (392), 392 states have call successors, (392) [2022-11-16 11:53:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1901 transitions. [2022-11-16 11:53:27,386 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1901 transitions. Word has length 130 [2022-11-16 11:53:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:27,386 INFO L495 AbstractCegarLoop]: Abstraction has 1413 states and 1901 transitions. [2022-11-16 11:53:27,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2022-11-16 11:53:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1901 transitions. [2022-11-16 11:53:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-16 11:53:27,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:27,392 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:27,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:53:27,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:53:27,599 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:27,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:27,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1962327715, now seen corresponding path program 4 times [2022-11-16 11:53:27,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:27,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56544868] [2022-11-16 11:53:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:27,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:27,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:53:27,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058662773] [2022-11-16 11:53:27,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:53:27,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:53:27,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:53:27,614 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:53:27,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88428b31-8f5a-4a0f-bb56-63180a4f28ec/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:53:27,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:53:27,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:53:27,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 11:53:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 176 proven. 91 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-16 11:53:31,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:36,385 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:55:06,656 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:56:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 176 proven. 47 refuted. 35 times theorem prover too weak. 564 trivial. 0 not checked. [2022-11-16 11:56:24,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:24,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56544868] [2022-11-16 11:56:24,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:56:24,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058662773] [2022-11-16 11:56:24,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058662773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:24,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:56:24,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2022-11-16 11:56:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592944574] [2022-11-16 11:56:24,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:24,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:56:24,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:56:24,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=874, Unknown=25, NotChecked=0, Total=1122 [2022-11-16 11:56:24,667 INFO L87 Difference]: Start difference. First operand 1413 states and 1901 transitions. Second operand has 34 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 27 states have internal predecessors, (73), 17 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 19 states have call predecessors, (46), 16 states have call successors, (46) [2022-11-16 11:56:28,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:30,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:32,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:34,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:36,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:40,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:42,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:44,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:47,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:49,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:53,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:55,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:56:59,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:57:01,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:58:39,795 WARN L233 SmtUtils]: Spent 1.59m on a formula simplification. DAG size of input: 113 DAG size of output: 102 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:58:41,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:58:55,022 WARN L233 SmtUtils]: Spent 10.21s on a formula simplification. DAG size of input: 103 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:58:57,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:58:59,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:01,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:04,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:06,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:08,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:10,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:13,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:15,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:16,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:25,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:27,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:29,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:31,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:34,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:36,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 11:59:58,421 WARN L233 SmtUtils]: Spent 16.32s on a formula simplification. DAG size of input: 103 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:01:50,285 WARN L233 SmtUtils]: Spent 1.84m on a formula simplification. DAG size of input: 112 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:01:52,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:01:54,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:01:57,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:01:59,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:01,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:03,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:05,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:08,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:09,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:11,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:14,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:16,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:18,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:20,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:23,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:25,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:27,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-16 12:02:29,218 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 []