./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 7cd88f875a58f4eeda0acf74fa673f6c9452a00f17e8b4a3e93b35765440e39d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:46:36,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:46:36,251 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:46:36,257 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:46:36,259 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:46:36,302 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:46:36,303 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:46:36,304 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:46:36,305 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:46:36,310 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:46:36,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:46:36,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:46:36,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:46:36,314 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:46:36,315 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:46:36,315 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:46:36,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:46:36,316 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:46:36,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:46:36,318 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:46:36,318 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:46:36,319 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:46:36,319 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:46:36,320 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:46:36,320 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:46:36,321 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:46:36,321 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:46:36,322 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:46:36,323 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:46:36,323 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:46:36,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:46:36,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:36,325 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:46:36,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:46:36,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:46:36,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:46:36,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:46:36,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:46:36,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:46:36,328 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:46:36,328 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:46:36,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:46:36,329 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cd88f875a58f4eeda0acf74fa673f6c9452a00f17e8b4a3e93b35765440e39d [2023-11-26 10:46:36,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:46:36,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:46:36,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:46:36,731 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:46:36,732 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:46:36,733 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2023-11-26 10:46:39,975 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:46:40,264 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:46:40,266 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i [2023-11-26 10:46:40,279 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/data/99c7326e2/20e69fc80dba4301908c7beae9ee14a6/FLAG2b56fce25 [2023-11-26 10:46:40,301 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/data/99c7326e2/20e69fc80dba4301908c7beae9ee14a6 [2023-11-26 10:46:40,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:46:40,315 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:46:40,320 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:40,320 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:46:40,328 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:46:40,329 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,330 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d97dff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40, skipping insertion in model container [2023-11-26 10:46:40,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,358 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:46:40,528 WARN L240 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_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2023-11-26 10:46:40,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:40,562 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:46:40,577 WARN L240 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_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound10.i[950,963] [2023-11-26 10:46:40,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:46:40,602 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:46:40,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40 WrapperNode [2023-11-26 10:46:40,603 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:46:40,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:40,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:46:40,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:46:40,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,620 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,639 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 48 [2023-11-26 10:46:40,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:46:40,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:46:40,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:46:40,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:46:40,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,669 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:46:40,669 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,669 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,673 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,678 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,682 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:46:40,684 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:46:40,684 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:46:40,684 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:46:40,685 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (1/1) ... [2023-11-26 10:46:40,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:46:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:40,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:46:40,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:46:40,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:46:40,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 10:46:40,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 10:46:40,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:46:40,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:46:40,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:46:40,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-26 10:46:40,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-26 10:46:40,851 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:46:40,854 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:46:41,082 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:46:41,109 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:46:41,109 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:46:41,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:41 BoogieIcfgContainer [2023-11-26 10:46:41,112 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:46:41,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:46:41,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:46:41,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:46:41,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:46:40" (1/3) ... [2023-11-26 10:46:41,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b08a589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:41, skipping insertion in model container [2023-11-26 10:46:41,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:46:40" (2/3) ... [2023-11-26 10:46:41,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b08a589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:46:41, skipping insertion in model container [2023-11-26 10:46:41,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:46:41" (3/3) ... [2023-11-26 10:46:41,148 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2023-11-26 10:46:41,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:46:41,177 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:46:41,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:46:41,245 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=LoopHeads, 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;@9e63ed5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:46:41,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:46:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:46:41,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 10:46:41,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:41,257 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] [2023-11-26 10:46:41,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:41,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1335240993, now seen corresponding path program 1 times [2023-11-26 10:46:41,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:41,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674355947] [2023-11-26 10:46:41,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:41,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:41,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:41,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674355947] [2023-11-26 10:46:41,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 10:46:41,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718229215] [2023-11-26 10:46:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:41,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:41,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:41,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:46:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:41,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 10:46:41,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-26 10:46:41,569 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:46:41,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718229215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:46:41,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:46:41,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:46:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654356288] [2023-11-26 10:46:41,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:41,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 10:46:41,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:41,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 10:46:41,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:46:41,619 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-11-26 10:46:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:41,663 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2023-11-26 10:46:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 10:46:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 29 [2023-11-26 10:46:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:41,674 INFO L225 Difference]: With dead ends: 50 [2023-11-26 10:46:41,675 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 10:46:41,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 10:46:41,683 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:41,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:46:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 10:46:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-26 10:46:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 10:46:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-26 10:46:41,725 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2023-11-26 10:46:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:41,725 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-26 10:46:41,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-11-26 10:46:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-26 10:46:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 10:46:41,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:41,728 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] [2023-11-26 10:46:41,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:46:41,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 10:46:41,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:41,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1249624970, now seen corresponding path program 1 times [2023-11-26 10:46:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:41,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928159944] [2023-11-26 10:46:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:41,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:41,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:41,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57214158] [2023-11-26 10:46:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:41,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:42,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:42,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:46:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:42,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:46:42,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:42,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:46:42,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-26 10:46:42,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928159944] [2023-11-26 10:46:42,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57214158] [2023-11-26 10:46:42,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57214158] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:42,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:42,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-26 10:46:42,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952484775] [2023-11-26 10:46:42,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:42,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:46:42,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:46:42,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:46:42,808 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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), 1 states have call successors, (4) [2023-11-26 10:46:46,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-26 10:46:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:46:47,026 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2023-11-26 10:46:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:46:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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), 1 states have call successors, (4) Word has length 30 [2023-11-26 10:46:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:46:47,028 INFO L225 Difference]: With dead ends: 36 [2023-11-26 10:46:47,028 INFO L226 Difference]: Without dead ends: 33 [2023-11-26 10:46:47,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:46:47,030 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-26 10:46:47,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 103 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2023-11-26 10:46:47,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-26 10:46:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-26 10:46:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:46:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-26 10:46:47,041 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2023-11-26 10:46:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:46:47,043 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-26 10:46:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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), 1 states have call successors, (4) [2023-11-26 10:46:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-26 10:46:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 10:46:47,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:46:47,045 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] [2023-11-26 10:46:47,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:46:47,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:47,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:46:47,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:46:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1303469435, now seen corresponding path program 1 times [2023-11-26 10:46:47,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:46:47,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115797402] [2023-11-26 10:46:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:47,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:46:47,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:46:47,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473306034] [2023-11-26 10:46:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:46:47,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:46:47,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:46:47,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:46:47,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:46:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:46:47,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:46:47,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:46:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 10:46:47,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:46:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-26 10:46:47,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:46:47,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115797402] [2023-11-26 10:46:47,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:46:47,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473306034] [2023-11-26 10:46:47,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473306034] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 10:46:47,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:46:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-26 10:46:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815193226] [2023-11-26 10:46:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:46:47,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:46:47,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:46:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:46:47,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:46:47,932 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2023-11-26 10:46:52,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-26 10:46:56,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-26 10:47:00,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-26 10:47:00,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:00,292 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-11-26 10:47:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:47:00,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 [2023-11-26 10:47:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:00,295 INFO L225 Difference]: With dead ends: 47 [2023-11-26 10:47:00,295 INFO L226 Difference]: Without dead ends: 45 [2023-11-26 10:47:00,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:47:00,309 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:00,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 106 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2023-11-26 10:47:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-26 10:47:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-11-26 10:47:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-26 10:47:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-11-26 10:47:00,332 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 32 [2023-11-26 10:47:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:00,333 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-11-26 10:47:00,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2023-11-26 10:47:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-11-26 10:47:00,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:47:00,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:00,335 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 10:47:00,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:00,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:00,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:00,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash -158878427, now seen corresponding path program 1 times [2023-11-26 10:47:00,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:00,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185968220] [2023-11-26 10:47:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:00,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:00,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435174624] [2023-11-26 10:47:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:00,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:00,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:00,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:00,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:47:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:00,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:47:00,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-26 10:47:00,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:47:00,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:00,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185968220] [2023-11-26 10:47:00,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:00,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435174624] [2023-11-26 10:47:00,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435174624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:00,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:00,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:00,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885407119] [2023-11-26 10:47:00,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:00,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:00,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:00,651 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 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) [2023-11-26 10:47:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:00,693 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2023-11-26 10:47:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:00,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 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 38 [2023-11-26 10:47:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:00,699 INFO L225 Difference]: With dead ends: 50 [2023-11-26 10:47:00,699 INFO L226 Difference]: Without dead ends: 32 [2023-11-26 10:47:00,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:00,705 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:00,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:47:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-26 10:47:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-26 10:47:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:47:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-11-26 10:47:00,721 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 38 [2023-11-26 10:47:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:00,722 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-11-26 10:47:00,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 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) [2023-11-26 10:47:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-11-26 10:47:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-26 10:47:00,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:00,724 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-26 10:47:00,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:00,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-26 10:47:00,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:00,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash 183265189, now seen corresponding path program 1 times [2023-11-26 10:47:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:00,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320381581] [2023-11-26 10:47:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:00,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:00,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163621276] [2023-11-26 10:47:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:00,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:00,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:00,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:00,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:47:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:01,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:47:01,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-26 10:47:01,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-26 10:47:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:01,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320381581] [2023-11-26 10:47:01,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:01,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163621276] [2023-11-26 10:47:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163621276] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:01,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:01,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-11-26 10:47:01,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115493640] [2023-11-26 10:47:01,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:01,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:47:01,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:47:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:47:01,191 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 10:47:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:01,956 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-11-26 10:47:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:47:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2023-11-26 10:47:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:01,959 INFO L225 Difference]: With dead ends: 38 [2023-11-26 10:47:01,959 INFO L226 Difference]: Without dead ends: 31 [2023-11-26 10:47:01,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:47:01,960 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:01,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:47:01,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-26 10:47:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-26 10:47:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 10:47:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-26 10:47:01,972 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 38 [2023-11-26 10:47:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:01,973 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-26 10:47:01,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-26 10:47:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-26 10:47:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 10:47:01,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:01,977 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:01,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:02,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:02,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:02,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash 599091488, now seen corresponding path program 1 times [2023-11-26 10:47:02,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:02,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642653245] [2023-11-26 10:47:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:02,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:02,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:02,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302993080] [2023-11-26 10:47:02,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:02,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:02,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:02,196 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:02,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:47:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:02,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 10:47:02,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-26 10:47:02,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:15,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642653245] [2023-11-26 10:47:15,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:15,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302993080] [2023-11-26 10:47:15,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302993080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:15,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:47:15,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-11-26 10:47:15,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720388453] [2023-11-26 10:47:15,683 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:15,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:47:15,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:15,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:47:15,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=198, Unknown=3, NotChecked=0, Total=240 [2023-11-26 10:47:15,685 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 10:47:16,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:16,612 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2023-11-26 10:47:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-26 10:47:16,612 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2023-11-26 10:47:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:16,613 INFO L225 Difference]: With dead ends: 44 [2023-11-26 10:47:16,613 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 10:47:16,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=56, Invalid=283, Unknown=3, NotChecked=0, Total=342 [2023-11-26 10:47:16,615 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:16,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 81 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:47:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 10:47:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2023-11-26 10:47:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 10:47:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-11-26 10:47:16,631 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 40 [2023-11-26 10:47:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:16,631 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-11-26 10:47:16,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-26 10:47:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-11-26 10:47:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-26 10:47:16,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:16,634 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:16,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:47:16,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:16,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2107284293, now seen corresponding path program 2 times [2023-11-26 10:47:16,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:16,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470855939] [2023-11-26 10:47:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:16,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:16,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:16,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199865367] [2023-11-26 10:47:16,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:47:16,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:16,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:16,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:16,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:47:17,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:47:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:17,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 10:47:17,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:47:17,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-26 10:47:18,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:18,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470855939] [2023-11-26 10:47:18,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 10:47:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199865367] [2023-11-26 10:47:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199865367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:18,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 10:47:18,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-26 10:47:18,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672927037] [2023-11-26 10:47:18,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:18,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-26 10:47:18,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-26 10:47:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-11-26 10:47:18,487 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-26 10:47:21,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-26 10:47:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:47:22,346 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2023-11-26 10:47:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:47:22,348 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 48 [2023-11-26 10:47:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:47:22,349 INFO L225 Difference]: With dead ends: 73 [2023-11-26 10:47:22,349 INFO L226 Difference]: Without dead ends: 46 [2023-11-26 10:47:22,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:47:22,350 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:47:22,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 157 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-26 10:47:22,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-26 10:47:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-11-26 10:47:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-26 10:47:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-11-26 10:47:22,365 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 48 [2023-11-26 10:47:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:47:22,365 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-11-26 10:47:22,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-26 10:47:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-11-26 10:47:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-26 10:47:22,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:47:22,367 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:22,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:22,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:22,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:47:22,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:22,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1064658186, now seen corresponding path program 3 times [2023-11-26 10:47:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:22,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663285656] [2023-11-26 10:47:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:22,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:22,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 10:47:22,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707640344] [2023-11-26 10:47:22,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:47:22,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:22,620 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:22,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd50a1ea-9cf5-4979-ab49-c386ee0d620e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:47:26,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-26 10:47:26,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:47:26,447 WARN L260 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-26 10:47:26,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 10:47:29,181 INFO L327 TraceCheckSpWp]: Computing backward predicates...