./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount25_file-44.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount25_file-44.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu --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 81a8d4a2e274ea03439b4780e4e81135b85cd8216b6685b3ff0798370a9049cf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:02:52,611 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:02:52,739 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:02:52,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:02:52,750 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:02:52,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:02:52,794 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:02:52,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:02:52,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:02:52,800 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:02:52,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:02:52,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:02:52,802 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:02:52,804 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:02:52,804 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:02:52,805 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:02:52,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:02:52,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:02:52,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:02:52,806 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:02:52,807 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:02:52,807 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:02:52,808 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:02:52,808 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:02:52,808 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:02:52,809 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:02:52,810 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:02:52,810 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:02:52,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:52,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:02:52,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:02:52,812 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:02:52,812 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:02:52,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:02:52,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:02:52,813 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:02:52,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:02:52,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:02:52,814 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:02:52,814 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_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81a8d4a2e274ea03439b4780e4e81135b85cd8216b6685b3ff0798370a9049cf [2023-11-19 08:02:53,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:02:53,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:02:53,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:02:53,204 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:02:53,205 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:02:53,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount25_file-44.i [2023-11-19 08:02:56,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:02:56,677 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:02:56,678 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount25_file-44.i [2023-11-19 08:02:56,687 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/data/574f62dff/6496353f055c498da744c74515e08937/FLAG8aa6d1561 [2023-11-19 08:02:56,704 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/data/574f62dff/6496353f055c498da744c74515e08937 [2023-11-19 08:02:56,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:02:56,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:02:56,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:56,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:02:56,727 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:02:56,728 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:56" (1/1) ... [2023-11-19 08:02:56,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559d2c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:56, skipping insertion in model container [2023-11-19 08:02:56,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:56" (1/1) ... [2023-11-19 08:02:56,772 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:02:56,990 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_165534a2-827f-428a-a25c-6938f9220db1/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount25_file-44.i[915,928] [2023-11-19 08:02:57,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:57,111 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:02:57,129 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_165534a2-827f-428a-a25c-6938f9220db1/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount25_file-44.i[915,928] [2023-11-19 08:02:57,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:57,177 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:02:57,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57 WrapperNode [2023-11-19 08:02:57,178 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:57,179 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:57,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:02:57,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:02:57,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,235 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 130 [2023-11-19 08:02:57,236 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:57,237 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:02:57,237 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:02:57,237 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:02:57,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,249 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,250 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,258 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,267 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:02:57,272 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:02:57,272 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:02:57,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:02:57,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (1/1) ... [2023-11-19 08:02:57,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:57,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:57,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:02:57,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:02:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:02:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:02:57,360 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:02:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:02:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:02:57,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:02:57,486 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:02:57,490 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:02:57,907 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:02:57,916 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:02:57,916 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:02:57,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:57 BoogieIcfgContainer [2023-11-19 08:02:57,921 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:02:57,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:02:57,924 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:02:57,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:02:57,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:56" (1/3) ... [2023-11-19 08:02:57,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fe3987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:57, skipping insertion in model container [2023-11-19 08:02:57,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:57" (2/3) ... [2023-11-19 08:02:57,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fe3987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:57, skipping insertion in model container [2023-11-19 08:02:57,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:57" (3/3) ... [2023-11-19 08:02:57,931 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount25_file-44.i [2023-11-19 08:02:57,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:02:57,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:02:58,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:58,014 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;@3f8db0f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:58,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:02:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 38 states have internal predecessors, (49), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-19 08:02:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 08:02:58,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:58,038 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:58,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:58,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2097040718, now seen corresponding path program 1 times [2023-11-19 08:02:58,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:58,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976482180] [2023-11-19 08:02:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:58,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:58,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:58,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976482180] [2023-11-19 08:02:58,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:02:58,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435153034] [2023-11-19 08:02:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:58,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:58,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:58,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:58,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:02:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:58,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:02:58,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2023-11-19 08:02:58,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:58,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435153034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:58,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:58,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:58,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889855548] [2023-11-19 08:02:58,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:58,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:02:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:58,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:02:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:02:58,737 INFO L87 Difference]: Start difference. First operand has 61 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 38 states have internal predecessors, (49), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-19 08:02:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:58,792 INFO L93 Difference]: Finished difference Result 115 states and 197 transitions. [2023-11-19 08:02:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:02:58,795 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) Word has length 132 [2023-11-19 08:02:58,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:58,806 INFO L225 Difference]: With dead ends: 115 [2023-11-19 08:02:58,806 INFO L226 Difference]: Without dead ends: 57 [2023-11-19 08:02:58,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:02:58,816 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:58,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-19 08:02:58,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-19 08:02:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-19 08:02:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 84 transitions. [2023-11-19 08:02:58,883 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 84 transitions. Word has length 132 [2023-11-19 08:02:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:58,884 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 84 transitions. [2023-11-19 08:02:58,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-19 08:02:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 84 transitions. [2023-11-19 08:02:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 08:02:58,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:58,896 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:58,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:59,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:02:59,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:59,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2113431860, now seen corresponding path program 1 times [2023-11-19 08:02:59,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:59,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679177888] [2023-11-19 08:02:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:59,222 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:59,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633960984] [2023-11-19 08:02:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:59,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:59,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:59,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:59,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:02:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:59,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 08:02:59,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 464 proven. 129 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-11-19 08:03:07,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-19 08:03:12,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679177888] [2023-11-19 08:03:12,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633960984] [2023-11-19 08:03:12,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633960984] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:12,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [20] total 25 [2023-11-19 08:03:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129888932] [2023-11-19 08:03:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:03:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:03:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:03:12,825 INFO L87 Difference]: Start difference. First operand 57 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-19 08:03:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:16,341 INFO L93 Difference]: Finished difference Result 152 states and 216 transitions. [2023-11-19 08:03:16,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:03:16,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 132 [2023-11-19 08:03:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:16,346 INFO L225 Difference]: With dead ends: 152 [2023-11-19 08:03:16,346 INFO L226 Difference]: Without dead ends: 98 [2023-11-19 08:03:16,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2023-11-19 08:03:16,349 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 113 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:16,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 376 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 08:03:16,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-19 08:03:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2023-11-19 08:03:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 46 states have internal predecessors, (55), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-19 08:03:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 105 transitions. [2023-11-19 08:03:16,374 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 105 transitions. Word has length 132 [2023-11-19 08:03:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:16,375 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 105 transitions. [2023-11-19 08:03:16,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-19 08:03:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 105 transitions. [2023-11-19 08:03:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-19 08:03:16,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:16,377 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:16,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:16,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 08:03:16,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:16,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1501477066, now seen corresponding path program 1 times [2023-11-19 08:03:16,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:16,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015263887] [2023-11-19 08:03:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:16,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:16,677 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:16,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862262851] [2023-11-19 08:03:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:16,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:16,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:16,692 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:16,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:03:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:16,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 08:03:16,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:22,112 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 524 proven. 111 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-11-19 08:03:22,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-19 08:03:26,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015263887] [2023-11-19 08:03:26,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:26,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862262851] [2023-11-19 08:03:26,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862262851] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:26,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:26,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [20] total 25 [2023-11-19 08:03:26,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819616955] [2023-11-19 08:03:26,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:26,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:03:26,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:26,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:03:26,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:03:26,559 INFO L87 Difference]: Start difference. First operand 73 states and 105 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-19 08:03:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:28,806 INFO L93 Difference]: Finished difference Result 164 states and 227 transitions. [2023-11-19 08:03:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:03:28,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 132 [2023-11-19 08:03:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:28,811 INFO L225 Difference]: With dead ends: 164 [2023-11-19 08:03:28,811 INFO L226 Difference]: Without dead ends: 101 [2023-11-19 08:03:28,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2023-11-19 08:03:28,814 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 149 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:28,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 263 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:03:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-19 08:03:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2023-11-19 08:03:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 49 states have internal predecessors, (58), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-19 08:03:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 108 transitions. [2023-11-19 08:03:28,852 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 108 transitions. Word has length 132 [2023-11-19 08:03:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:28,853 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 108 transitions. [2023-11-19 08:03:28,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-19 08:03:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 108 transitions. [2023-11-19 08:03:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-19 08:03:28,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:28,856 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:28,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:29,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:29,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:29,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1837845704, now seen corresponding path program 1 times [2023-11-19 08:03:29,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:29,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61477408] [2023-11-19 08:03:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:29,125 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:29,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427518341] [2023-11-19 08:03:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:29,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:29,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:29,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:29,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:03:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:29,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 08:03:29,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 503 proven. 147 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-11-19 08:03:34,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:35,024 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse18 (= 2 c_~var_1_12~0))) (let ((.cse7 (not .cse18)) (.cse9 (+ 256 c_~var_1_12~0)) (.cse16 (= (mod c_~var_1_13~0 256) 0)) (.cse1 (+ c_~var_1_6~0 c_~var_1_12~0))) (let ((.cse2 (+ c_~var_1_5~0 1)) (.cse3 (< c_~var_1_5~0 .cse1)) (.cse4 (= c_~var_1_1~0 c_~var_1_12~0)) (.cse12 (or .cse18 .cse16)) (.cse13 (mod c_~var_1_10~0 256)) (.cse5 (mod c_~var_1_11~0 256)) (.cse6 (let ((.cse17 (mod c_~var_1_16~0 256))) (and (or (= 2 .cse17) .cse7) (or (= .cse17 c_~var_1_12~0) (< 127 .cse17)) (or (< .cse17 128) (= .cse9 .cse17))))) (.cse11 (not .cse16)) (.cse10 (* 255 c_~var_1_11~0)) (.cse15 (* 255 c_~var_1_10~0)) (.cse0 (mod c_~var_1_8~0 256))) (and (or (and (forall ((v_z_41 Int)) (or (< v_z_41 0) (= c_~var_1_1~0 v_z_41) (< c_~var_1_5~0 (div .cse0 v_z_41)) (< 255 v_z_41))) (or (forall ((v_z_41 Int)) (or (< v_z_41 0) (< c_~var_1_5~0 (div .cse0 v_z_41)) (< 255 v_z_41))) (< .cse1 .cse2)) (or .cse3 (forall ((v_z_39 Int)) (or (< v_z_39 0) (< 255 v_z_39) (< (div .cse0 v_z_39) .cse2) (= c_~var_1_1~0 v_z_39))))) .cse4) (or (and (or (and (or (< (+ c_~var_1_16~0 c_~var_1_15~0 .cse5) c_~var_1_14~0) .cse6) (or (let ((.cse8 (mod (+ .cse10 (* 255 c_~var_1_15~0) c_~var_1_14~0) 256))) (and (or .cse7 (= 2 .cse8)) (or (< 127 .cse8) (= c_~var_1_12~0 .cse8)) (or (= .cse9 .cse8) (< .cse8 128)))) (< c_~var_1_14~0 (+ c_~var_1_16~0 c_~var_1_15~0 .cse5 1)))) .cse11) .cse12) (< c_~var_1_15~0 .cse13)) (or (and (or (forall ((v_z_38 Int)) (or (< 255 v_z_38) (< c_~var_1_5~0 (div .cse0 v_z_38)) (< v_z_38 0) (= c_~var_1_1~0 v_z_38))) .cse3) (or (forall ((v_z_35 Int)) (or (< (div .cse0 v_z_35) .cse2) (< 255 v_z_35) (< v_z_35 0) (= c_~var_1_1~0 v_z_35))) .cse3)) (not .cse4)) (or (< .cse13 (+ c_~var_1_15~0 1)) (and .cse12 (or (and (or (let ((.cse14 (mod (+ .cse10 c_~var_1_14~0 .cse15) 256))) (and (or (< .cse14 128) (= .cse9 .cse14)) (or (< 127 .cse14) (= .cse14 c_~var_1_12~0)) (or .cse7 (= .cse14 2)))) (< c_~var_1_14~0 (+ .cse13 c_~var_1_16~0 .cse5 1))) (or (< (+ .cse13 c_~var_1_16~0 .cse5) c_~var_1_14~0) .cse6)) .cse11))) (= (mod (+ .cse10 c_~var_1_9~0 .cse15) 256) .cse0))))) is different from false [2023-11-19 08:03:35,626 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse15 (= (mod c_~var_1_13~0 256) 0)) (.cse8 (+ 256 c_~var_1_12~0)) (.cse1 (+ c_~var_1_6~0 c_~var_1_12~0))) (let ((.cse2 (+ c_~var_1_5~0 1)) (.cse3 (< c_~var_1_5~0 .cse1)) (.cse4 (= c_~var_1_1~0 c_~var_1_12~0)) (.cse10 (* 255 c_~var_1_10~0)) (.cse0 (mod c_~var_1_8~0 256)) (.cse5 (mod c_~var_1_10~0 256)) (.cse12 (let ((.cse16 (mod c_~var_1_16~0 256))) (and (or (= .cse16 c_~var_1_12~0) (< 127 .cse16)) (or (< .cse16 128) (= .cse8 .cse16))))) (.cse9 (* 255 c_~var_1_11~0)) (.cse11 (mod c_~var_1_11~0 256)) (.cse6 (not .cse15)) (.cse13 (or (= 2 c_~var_1_12~0) .cse15))) (and (or (and (forall ((v_z_41 Int)) (or (< v_z_41 0) (= c_~var_1_1~0 v_z_41) (< c_~var_1_5~0 (div .cse0 v_z_41)) (< 255 v_z_41))) (or (forall ((v_z_41 Int)) (or (< v_z_41 0) (< c_~var_1_5~0 (div .cse0 v_z_41)) (< 255 v_z_41))) (< .cse1 .cse2)) (or .cse3 (forall ((v_z_39 Int)) (or (< v_z_39 0) (< 255 v_z_39) (< (div .cse0 v_z_39) .cse2) (= c_~var_1_1~0 v_z_39))))) .cse4) (or (and (or (forall ((v_z_38 Int)) (or (< 255 v_z_38) (< c_~var_1_5~0 (div .cse0 v_z_38)) (< v_z_38 0) (= c_~var_1_1~0 v_z_38))) .cse3) (or (forall ((v_z_35 Int)) (or (< (div .cse0 v_z_35) .cse2) (< 255 v_z_35) (< v_z_35 0) (= c_~var_1_1~0 v_z_35))) .cse3)) (not .cse4)) (or (< .cse5 (+ c_~var_1_15~0 1)) (and (or .cse6 (and (or (let ((.cse7 (mod (+ .cse9 c_~var_1_14~0 .cse10) 256))) (and (or (< .cse7 128) (= .cse8 .cse7)) (or (< 127 .cse7) (= .cse7 c_~var_1_12~0)))) (< c_~var_1_14~0 (+ .cse5 c_~var_1_16~0 .cse11 1))) (or (< (+ .cse5 c_~var_1_16~0 .cse11) c_~var_1_14~0) .cse12))) .cse13)) (= (mod (+ .cse9 c_~var_1_9~0 .cse10) 256) .cse0) (or (< c_~var_1_15~0 .cse5) (and (or (and (or (< (+ c_~var_1_16~0 c_~var_1_15~0 .cse11) c_~var_1_14~0) .cse12) (or (let ((.cse14 (mod (+ .cse9 (* 255 c_~var_1_15~0) c_~var_1_14~0) 256))) (and (or (< 127 .cse14) (= c_~var_1_12~0 .cse14)) (or (= .cse8 .cse14) (< .cse14 128)))) (< c_~var_1_14~0 (+ c_~var_1_16~0 c_~var_1_15~0 .cse11 1)))) .cse6) .cse13))))) is different from false [2023-11-19 08:03:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-19 08:03:39,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:39,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61477408] [2023-11-19 08:03:39,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:39,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427518341] [2023-11-19 08:03:39,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427518341] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:39,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:39,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [20] total 26 [2023-11-19 08:03:39,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074274503] [2023-11-19 08:03:39,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:39,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:03:39,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:39,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:03:39,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=433, Unknown=2, NotChecked=90, Total=650 [2023-11-19 08:03:39,275 INFO L87 Difference]: Start difference. First operand 77 states and 108 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-19 08:03:40,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:40,773 INFO L93 Difference]: Finished difference Result 168 states and 232 transitions. [2023-11-19 08:03:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:03:40,774 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 133 [2023-11-19 08:03:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:40,776 INFO L225 Difference]: With dead ends: 168 [2023-11-19 08:03:40,777 INFO L226 Difference]: Without dead ends: 101 [2023-11-19 08:03:40,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=156, Invalid=606, Unknown=2, NotChecked=106, Total=870 [2023-11-19 08:03:40,780 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 112 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:40,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 362 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 127 Invalid, 4 Unknown, 190 Unchecked, 0.7s Time] [2023-11-19 08:03:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-19 08:03:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2023-11-19 08:03:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 08:03:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 123 transitions. [2023-11-19 08:03:40,826 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 123 transitions. Word has length 133 [2023-11-19 08:03:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:40,827 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 123 transitions. [2023-11-19 08:03:40,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-19 08:03:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 123 transitions. [2023-11-19 08:03:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-19 08:03:40,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:40,830 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:40,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 08:03:41,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:41,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:41,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash -62838342, now seen corresponding path program 1 times [2023-11-19 08:03:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:41,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765598737] [2023-11-19 08:03:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:41,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:41,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:41,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421403275] [2023-11-19 08:03:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:41,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:41,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:41,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:41,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:03:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:41,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:03:41,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-19 08:03:44,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:03:44,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765598737] [2023-11-19 08:03:44,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421403275] [2023-11-19 08:03:44,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421403275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:44,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:44,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 08:03:44,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403258416] [2023-11-19 08:03:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:44,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:03:44,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:03:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:03:44,748 INFO L87 Difference]: Start difference. First operand 88 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-19 08:03:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:03:46,019 INFO L93 Difference]: Finished difference Result 229 states and 312 transitions. [2023-11-19 08:03:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 08:03:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 133 [2023-11-19 08:03:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:03:46,026 INFO L225 Difference]: With dead ends: 229 [2023-11-19 08:03:46,027 INFO L226 Difference]: Without dead ends: 159 [2023-11-19 08:03:46,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:03:46,030 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 136 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:03:46,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 391 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:03:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-19 08:03:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 91. [2023-11-19 08:03:46,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 59 states have internal predecessors, (72), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 08:03:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 128 transitions. [2023-11-19 08:03:46,104 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 128 transitions. Word has length 133 [2023-11-19 08:03:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:03:46,104 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 128 transitions. [2023-11-19 08:03:46,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-19 08:03:46,105 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 128 transitions. [2023-11-19 08:03:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-19 08:03:46,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:03:46,107 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:46,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:46,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:46,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:03:46,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2064094582, now seen corresponding path program 1 times [2023-11-19 08:03:46,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:46,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794801439] [2023-11-19 08:03:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:46,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:46,349 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:03:46,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789004446] [2023-11-19 08:03:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:46,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:46,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:46,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:46,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_165534a2-827f-428a-a25c-6938f9220db1/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:03:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:46,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 08:03:46,743 INFO L285 TraceCheckSpWp]: Computing forward predicates...