./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const3.c --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_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/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_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/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_46310905-bb0d-4906-bfc5-7c9ca159464f/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 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:53:52,098 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:53:52,174 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:53:52,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:53:52,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:53:52,213 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:53:52,214 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:53:52,215 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:53:52,216 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:53:52,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:53:52,218 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:53:52,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:53:52,219 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:53:52,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:53:52,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:53:52,222 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:53:52,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:53:52,223 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:53:52,224 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:53:52,225 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:53:52,225 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:53:52,226 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:53:52,227 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:53:52,227 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:53:52,228 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:53:52,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:53:52,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:53:52,229 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:53:52,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:52,231 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:53:52,231 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:53:52,232 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:53:52,232 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:53:52,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:53:52,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:53:52,234 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:53:52,234 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:53:52,235 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:53:52,236 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:53:52,236 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_46310905-bb0d-4906-bfc5-7c9ca159464f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a8466707e2bff30c44c48996d40a42275ef25007ed8ba21de1de20ade9b7ba9 [2023-11-19 07:53:52,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:53:52,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:53:52,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:53:52,583 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:53:52,584 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:53:52,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-crafted/zero_sum_const3.c [2023-11-19 07:53:56,031 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:53:56,315 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:53:56,315 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/sv-benchmarks/c/array-crafted/zero_sum_const3.c [2023-11-19 07:53:56,328 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/data/e9ca8bdb6/be8470d327a04e8cb06b04c99d17359a/FLAG6bb060f52 [2023-11-19 07:53:56,351 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/data/e9ca8bdb6/be8470d327a04e8cb06b04c99d17359a [2023-11-19 07:53:56,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:53:56,364 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:53:56,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:56,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:53:56,375 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:53:56,376 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1588423f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56, skipping insertion in model container [2023-11-19 07:53:56,379 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,412 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:53:56,638 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_46310905-bb0d-4906-bfc5-7c9ca159464f/sv-benchmarks/c/array-crafted/zero_sum_const3.c[406,419] [2023-11-19 07:53:56,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:56,686 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:53:56,703 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_46310905-bb0d-4906-bfc5-7c9ca159464f/sv-benchmarks/c/array-crafted/zero_sum_const3.c[406,419] [2023-11-19 07:53:56,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:53:56,736 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:53:56,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56 WrapperNode [2023-11-19 07:53:56,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:53:56,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:56,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:53:56,739 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:53:56,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,758 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,801 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2023-11-19 07:53:56,802 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:53:56,802 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:53:56,803 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:53:56,803 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:53:56,816 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,819 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,819 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,825 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,830 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,832 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,833 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:53:56,837 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:53:56,837 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:53:56,838 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:53:56,838 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (1/1) ... [2023-11-19 07:53:56,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:53:56,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:56,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:53:56,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:53:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:53:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:53:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:53:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:53:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:53:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:53:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:53:57,038 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:53:57,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:53:57,317 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:53:57,325 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:53:57,326 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-19 07:53:57,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:57 BoogieIcfgContainer [2023-11-19 07:53:57,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:53:57,333 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:53:57,333 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:53:57,337 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:53:57,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:53:56" (1/3) ... [2023-11-19 07:53:57,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1fafbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:57, skipping insertion in model container [2023-11-19 07:53:57,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:53:56" (2/3) ... [2023-11-19 07:53:57,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1fafbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:53:57, skipping insertion in model container [2023-11-19 07:53:57,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:53:57" (3/3) ... [2023-11-19 07:53:57,341 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2023-11-19 07:53:57,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:53:57,360 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:53:57,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:53:57,416 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;@4f1f2f83, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:53:57,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:53:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:57,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:53:57,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:57,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:57,428 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:57,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:57,434 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2023-11-19 07:53:57,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:57,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931500700] [2023-11-19 07:53:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:57,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:53:57,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:57,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931500700] [2023-11-19 07:53:57,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931500700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:57,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:57,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:53:57,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525924599] [2023-11-19 07:53:57,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:57,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:53:57,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:53:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:53:57,700 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:57,721 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2023-11-19 07:53:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:53:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 07:53:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:57,733 INFO L225 Difference]: With dead ends: 59 [2023-11-19 07:53:57,733 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 07:53:57,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:53:57,741 INFO L413 NwaCegarLoop]: 39 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, 39 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 07:53:57,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:53:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 07:53:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 07:53:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-19 07:53:57,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2023-11-19 07:53:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:57,783 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-19 07:53:57,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-19 07:53:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:53:57,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:57,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:57,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:53:57,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:57,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2023-11-19 07:53:57,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:57,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859478226] [2023-11-19 07:53:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:57,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:53:57,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:57,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859478226] [2023-11-19 07:53:57,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859478226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:57,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:57,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:53:57,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504247170] [2023-11-19 07:53:57,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:58,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:53:58,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:53:58,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:53:58,002 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:58,076 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-11-19 07:53:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:53:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 07:53:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:58,078 INFO L225 Difference]: With dead ends: 51 [2023-11-19 07:53:58,078 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 07:53:58,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:53:58,081 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:58,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:53:58,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 07:53:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-19 07:53:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-19 07:53:58,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2023-11-19 07:53:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:58,091 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-19 07:53:58,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-19 07:53:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 07:53:58,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:58,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:58,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:53:58,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:58,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:58,099 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2023-11-19 07:53:58,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398861194] [2023-11-19 07:53:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:53:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398861194] [2023-11-19 07:53:58,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398861194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:53:58,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:53:58,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:53:58,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580830802] [2023-11-19 07:53:58,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:53:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:53:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:53:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:53:58,256 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:58,356 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2023-11-19 07:53:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:53:58,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-19 07:53:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:58,358 INFO L225 Difference]: With dead ends: 60 [2023-11-19 07:53:58,358 INFO L226 Difference]: Without dead ends: 41 [2023-11-19 07:53:58,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:53:58,366 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:58,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:53:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-19 07:53:58,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2023-11-19 07:53:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-19 07:53:58,377 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2023-11-19 07:53:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:58,377 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-19 07:53:58,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-19 07:53:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 07:53:58,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:58,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:53:58,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:53:58,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:58,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:58,381 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2023-11-19 07:53:58,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:58,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480441069] [2023-11-19 07:53:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:58,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:53:58,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480441069] [2023-11-19 07:53:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480441069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:53:58,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185965723] [2023-11-19 07:53:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:58,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:58,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:58,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:53:58,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:53:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:58,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:53:58,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:53:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:53:58,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:53:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:53:58,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185965723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:53:58,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:53:58,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:53:58,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032394142] [2023-11-19 07:53:58,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:53:58,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:53:58,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:58,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:53:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:53:58,843 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:58,950 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2023-11-19 07:53:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:53:58,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-19 07:53:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:58,952 INFO L225 Difference]: With dead ends: 65 [2023-11-19 07:53:58,952 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 07:53:58,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:53:58,963 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:58,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:53:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 07:53:58,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-11-19 07:53:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-19 07:53:58,974 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2023-11-19 07:53:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:58,974 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-19 07:53:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-19 07:53:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 07:53:58,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:58,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:59,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:53:59,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:59,177 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:59,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:59,178 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2023-11-19 07:53:59,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:59,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78607600] [2023-11-19 07:53:59,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:59,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:53:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:53:59,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:53:59,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78607600] [2023-11-19 07:53:59,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78607600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:53:59,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441111222] [2023-11-19 07:53:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:53:59,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:53:59,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:53:59,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:53:59,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:53:59,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:53:59,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:53:59,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:53:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:53:59,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:53:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:53:59,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441111222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:53:59,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:53:59,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:53:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569979943] [2023-11-19 07:53:59,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:53:59,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:53:59,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:53:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:53:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:53:59,498 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:53:59,633 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2023-11-19 07:53:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:53:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-19 07:53:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:53:59,635 INFO L225 Difference]: With dead ends: 79 [2023-11-19 07:53:59,635 INFO L226 Difference]: Without dead ends: 55 [2023-11-19 07:53:59,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:53:59,636 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:53:59,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 24 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:53:59,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-19 07:53:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2023-11-19 07:53:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-11-19 07:53:59,646 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2023-11-19 07:53:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:53:59,647 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-11-19 07:53:59,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:53:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-11-19 07:53:59,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 07:53:59,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:53:59,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:53:59,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:53:59,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:53:59,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:53:59,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:53:59,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2023-11-19 07:53:59,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:53:59,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570262969] [2023-11-19 07:53:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:53:59,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:53:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:03,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:03,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570262969] [2023-11-19 07:54:03,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570262969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805819853] [2023-11-19 07:54:03,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:54:03,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:03,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:03,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:03,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:54:03,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:54:03,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:03,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-19 07:54:03,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:03,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:54:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:04,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:54:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805819853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:04,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 11] total 33 [2023-11-19 07:54:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220691301] [2023-11-19 07:54:04,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:04,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 07:54:04,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:04,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:54:04,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 07:54:04,814 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:05,516 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2023-11-19 07:54:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:54:05,517 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-19 07:54:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:05,523 INFO L225 Difference]: With dead ends: 85 [2023-11-19 07:54:05,524 INFO L226 Difference]: Without dead ends: 81 [2023-11-19 07:54:05,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2023-11-19 07:54:05,526 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:05,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 111 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:54:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-19 07:54:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2023-11-19 07:54:05,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2023-11-19 07:54:05,565 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2023-11-19 07:54:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:05,566 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2023-11-19 07:54:05,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2023-11-19 07:54:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 07:54:05,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:05,575 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:05,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:05,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:05,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:05,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:05,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2023-11-19 07:54:05,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:05,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114332282] [2023-11-19 07:54:05,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:05,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:54:06,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:06,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114332282] [2023-11-19 07:54:06,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114332282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799747808] [2023-11-19 07:54:06,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:54:06,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:06,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:06,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:06,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:54:06,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:54:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:06,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:54:06,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:54:06,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:54:06,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799747808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:06,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:06,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-19 07:54:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132811911] [2023-11-19 07:54:06,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:06,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:54:06,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:06,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:54:06,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:54:06,342 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:06,706 INFO L93 Difference]: Finished difference Result 177 states and 202 transitions. [2023-11-19 07:54:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:54:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-19 07:54:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:06,711 INFO L225 Difference]: With dead ends: 177 [2023-11-19 07:54:06,711 INFO L226 Difference]: Without dead ends: 104 [2023-11-19 07:54:06,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:54:06,714 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:06,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 39 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:54:06,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-19 07:54:06,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2023-11-19 07:54:06,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2023-11-19 07:54:06,741 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 49 [2023-11-19 07:54:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:06,742 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2023-11-19 07:54:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2023-11-19 07:54:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 07:54:06,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:06,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:06,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:06,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:54:06,968 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:06,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:06,969 INFO L85 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2023-11-19 07:54:06,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:06,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247537474] [2023-11-19 07:54:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:06,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 07:54:07,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:07,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247537474] [2023-11-19 07:54:07,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247537474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:07,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464803585] [2023-11-19 07:54:07,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:54:07,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:07,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:07,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:07,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:54:07,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-19 07:54:07,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:07,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:54:07,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 07:54:07,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 07:54:07,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464803585] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:07,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:07,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-19 07:54:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811551208] [2023-11-19 07:54:07,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:07,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:54:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:07,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:54:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:54:07,509 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:07,801 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2023-11-19 07:54:07,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:54:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-19 07:54:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:07,803 INFO L225 Difference]: With dead ends: 96 [2023-11-19 07:54:07,803 INFO L226 Difference]: Without dead ends: 68 [2023-11-19 07:54:07,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:54:07,804 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:07,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 29 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:54:07,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-19 07:54:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2023-11-19 07:54:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-11-19 07:54:07,832 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2023-11-19 07:54:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:07,832 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-11-19 07:54:07,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-11-19 07:54:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-19 07:54:07,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:07,835 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:07,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:08,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:54:08,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:08,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:08,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2023-11-19 07:54:08,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:08,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944729894] [2023-11-19 07:54:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:08,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:15,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944729894] [2023-11-19 07:54:15,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944729894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:15,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208051915] [2023-11-19 07:54:15,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:54:15,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:15,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:15,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:15,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:54:16,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-19 07:54:16,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:16,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 90 conjunts are in the unsatisfiable core [2023-11-19 07:54:16,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:16,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 07:54:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:17,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:54:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208051915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:18,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:18,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 18, 15] total 73 [2023-11-19 07:54:18,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662528575] [2023-11-19 07:54:18,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:18,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-19 07:54:18,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-19 07:54:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=4961, Unknown=0, NotChecked=0, Total=5256 [2023-11-19 07:54:18,649 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 73 states, 73 states have (on average 2.2465753424657535) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:23,703 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2023-11-19 07:54:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 07:54:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.2465753424657535) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-19 07:54:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:23,706 INFO L225 Difference]: With dead ends: 137 [2023-11-19 07:54:23,706 INFO L226 Difference]: Without dead ends: 133 [2023-11-19 07:54:23,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=626, Invalid=9076, Unknown=0, NotChecked=0, Total=9702 [2023-11-19 07:54:23,711 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 3320 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 3552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 3320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:23,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 137 Invalid, 3552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 3320 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 07:54:23,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-19 07:54:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2023-11-19 07:54:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2023-11-19 07:54:23,726 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 61 [2023-11-19 07:54:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:23,727 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2023-11-19 07:54:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.2465753424657535) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2023-11-19 07:54:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:54:23,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:23,728 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:23,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:23,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:23,955 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:23,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2140781352, now seen corresponding path program 7 times [2023-11-19 07:54:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:23,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010040438] [2023-11-19 07:54:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:23,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:23,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:54:24,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:24,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010040438] [2023-11-19 07:54:24,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010040438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:24,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815108218] [2023-11-19 07:54:24,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:54:24,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:24,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:24,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:24,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:54:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:24,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:54:24,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:54:24,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 07:54:24,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815108218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:24,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:24,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-19 07:54:24,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228060085] [2023-11-19 07:54:24,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:24,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:54:24,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:24,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:54:24,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:54:24,513 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:24,904 INFO L93 Difference]: Finished difference Result 221 states and 246 transitions. [2023-11-19 07:54:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:54:24,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-11-19 07:54:24,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:24,906 INFO L225 Difference]: With dead ends: 221 [2023-11-19 07:54:24,906 INFO L226 Difference]: Without dead ends: 126 [2023-11-19 07:54:24,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 113 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:54:24,908 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:24,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 35 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:54:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-19 07:54:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2023-11-19 07:54:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.1047619047619048) internal successors, (116), 105 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2023-11-19 07:54:24,927 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 63 [2023-11-19 07:54:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:24,928 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2023-11-19 07:54:24,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2023-11-19 07:54:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 07:54:24,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:24,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:24,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:25,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:25,157 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:25,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:25,158 INFO L85 PathProgramCache]: Analyzing trace with hash 156775434, now seen corresponding path program 8 times [2023-11-19 07:54:25,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:25,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156731705] [2023-11-19 07:54:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 07:54:25,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156731705] [2023-11-19 07:54:25,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156731705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982511252] [2023-11-19 07:54:25,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:25,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:25,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:25,326 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:25,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:54:25,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:25,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:25,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:54:25,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 07:54:25,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 07:54:25,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982511252] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:25,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:25,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-19 07:54:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304760934] [2023-11-19 07:54:25,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:25,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:54:25,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:25,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:54:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:54:25,666 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:54:25,993 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2023-11-19 07:54:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:54:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-19 07:54:25,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:54:25,995 INFO L225 Difference]: With dead ends: 118 [2023-11-19 07:54:25,995 INFO L226 Difference]: Without dead ends: 82 [2023-11-19 07:54:25,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:54:25,996 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:54:25,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 26 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:54:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-19 07:54:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2023-11-19 07:54:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 75 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2023-11-19 07:54:26,008 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2023-11-19 07:54:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:54:26,008 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2023-11-19 07:54:26,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2023-11-19 07:54:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 07:54:26,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:54:26,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:26,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:26,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:26,226 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:54:26,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:26,226 INFO L85 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2023-11-19 07:54:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:26,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074836058] [2023-11-19 07:54:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:26,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:33,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:33,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074836058] [2023-11-19 07:54:33,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074836058] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:33,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756477566] [2023-11-19 07:54:33,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:54:33,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:33,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:33,104 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:33,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46310905-bb0d-4906-bfc5-7c9ca159464f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:54:33,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-19 07:54:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:33,212 WARN L260 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 123 conjunts are in the unsatisfiable core [2023-11-19 07:54:33,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:36,947 INFO L327 TraceCheckSpWp]: Computing backward predicates...