./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c10f08fb4b6a5b6f03e91e10a510f262e1b7fa98e124f4a160c252b3d63b04c2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:46:27,983 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:46:28,115 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:46:28,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:46:28,125 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:46:28,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:46:28,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:46:28,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:46:28,171 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:46:28,177 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:46:28,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:46:28,178 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:46:28,179 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:46:28,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:46:28,182 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:46:28,182 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:46:28,183 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:46:28,183 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:46:28,184 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:46:28,184 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:46:28,185 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:46:28,186 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:46:28,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:46:28,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:46:28,187 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:46:28,188 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:46:28,188 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:46:28,189 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:46:28,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:46:28,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:46:28,192 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:46:28,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:28,192 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:46:28,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:46:28,193 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:46:28,193 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:46:28,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:46:28,194 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:46:28,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:46:28,194 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:46:28,194 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:46:28,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:46:28,195 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_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f08fb4b6a5b6f03e91e10a510f262e1b7fa98e124f4a160c252b3d63b04c2 [2023-11-26 11:46:28,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:46:28,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:46:28,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:46:28,546 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:46:28,546 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:46:28,548 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/array-fpi/brs3.c [2023-11-26 11:46:31,703 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:46:31,895 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:46:31,896 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/sv-benchmarks/c/array-fpi/brs3.c [2023-11-26 11:46:31,905 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/data/e3474a645/942e05d314b746e3af23d54e64126143/FLAG22db546b8 [2023-11-26 11:46:31,921 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/data/e3474a645/942e05d314b746e3af23d54e64126143 [2023-11-26 11:46:31,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:46:31,926 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:46:31,927 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:31,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:46:31,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:46:31,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:31" (1/1) ... [2023-11-26 11:46:31,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eacf5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:31, skipping insertion in model container [2023-11-26 11:46:31,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:31" (1/1) ... [2023-11-26 11:46:31,967 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:46:32,125 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_4646624d-e7df-491d-870c-c26820a78c4b/sv-benchmarks/c/array-fpi/brs3.c[587,600] [2023-11-26 11:46:32,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:32,157 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:46:32,174 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_4646624d-e7df-491d-870c-c26820a78c4b/sv-benchmarks/c/array-fpi/brs3.c[587,600] [2023-11-26 11:46:32,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:32,200 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:46:32,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32 WrapperNode [2023-11-26 11:46:32,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:32,203 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:32,203 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:46:32,203 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:46:32,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,221 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,247 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-11-26 11:46:32,247 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:32,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:46:32,248 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:46:32,249 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:46:32,262 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,265 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,283 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 7, 4, 3]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2023-11-26 11:46:32,284 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,284 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,304 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:46:32,305 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:46:32,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:46:32,305 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:46:32,306 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (1/1) ... [2023-11-26 11:46:32,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:32,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:32,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:46:32,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:46:32,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:46:32,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:46:32,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:46:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:46:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:46:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:46:32,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:46:32,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:46:32,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:46:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:46:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:46:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:46:32,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:46:32,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:46:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:46:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:46:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:46:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:46:32,549 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:46:32,551 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:46:32,733 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:46:32,763 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:46:32,763 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 11:46:32,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:32 BoogieIcfgContainer [2023-11-26 11:46:32,764 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:46:32,768 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:46:32,769 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:46:32,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:46:32,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:46:31" (1/3) ... [2023-11-26 11:46:32,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0c15de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:32, skipping insertion in model container [2023-11-26 11:46:32,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:32" (2/3) ... [2023-11-26 11:46:32,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0c15de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:32, skipping insertion in model container [2023-11-26 11:46:32,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:32" (3/3) ... [2023-11-26 11:46:32,777 INFO L112 eAbstractionObserver]: Analyzing ICFG brs3.c [2023-11-26 11:46:32,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:46:32,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:46:32,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:46:32,874 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;@6a8f562, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:46:32,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:46:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2023-11-26 11:46:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:46:32,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:32,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:32,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:32,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1256235845, now seen corresponding path program 1 times [2023-11-26 11:46:32,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:32,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273914589] [2023-11-26 11:46:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:32,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:33,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:33,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273914589] [2023-11-26 11:46:33,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273914589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:33,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:33,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:46:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129939971] [2023-11-26 11:46:33,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:33,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:46:33,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:46:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:46:33,250 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-26 11:46:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:33,294 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2023-11-26 11:46:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:46:33,301 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2023-11-26 11:46:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:33,309 INFO L225 Difference]: With dead ends: 33 [2023-11-26 11:46:33,309 INFO L226 Difference]: Without dead ends: 15 [2023-11-26 11:46:33,312 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 [2023-11-26 11:46:33,321 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:33,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:46:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-26 11:46:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-26 11:46:33,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-11-26 11:46:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-26 11:46:33,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2023-11-26 11:46:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:33,363 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-26 11:46:33,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-26 11:46:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-26 11:46:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:46:33,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:33,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:33,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:46:33,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:33,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2065910172, now seen corresponding path program 1 times [2023-11-26 11:46:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:33,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365783550] [2023-11-26 11:46:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:33,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:33,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365783550] [2023-11-26 11:46:33,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365783550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:33,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:33,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:46:33,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425572790] [2023-11-26 11:46:33,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:33,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:46:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:46:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:46:33,548 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-26 11:46:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:33,618 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2023-11-26 11:46:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:46:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2023-11-26 11:46:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:33,621 INFO L225 Difference]: With dead ends: 32 [2023-11-26 11:46:33,621 INFO L226 Difference]: Without dead ends: 21 [2023-11-26 11:46:33,621 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 [2023-11-26 11:46:33,624 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:33,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:46:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-26 11:46:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-11-26 11:46:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2023-11-26 11:46:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-26 11:46:33,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2023-11-26 11:46:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:33,639 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-26 11:46:33,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-26 11:46:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-26 11:46:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-26 11:46:33,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:33,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:33,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:46:33,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:33,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 785079709, now seen corresponding path program 1 times [2023-11-26 11:46:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:33,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680664117] [2023-11-26 11:46:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:46:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:34,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680664117] [2023-11-26 11:46:34,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680664117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:34,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:34,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:46:34,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723599769] [2023-11-26 11:46:34,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:34,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:46:34,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:34,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:46:34,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:46:34,162 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-26 11:46:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:34,214 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-26 11:46:34,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:46:34,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2023-11-26 11:46:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:34,216 INFO L225 Difference]: With dead ends: 26 [2023-11-26 11:46:34,216 INFO L226 Difference]: Without dead ends: 22 [2023-11-26 11:46:34,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:46:34,219 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:34,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:46:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-26 11:46:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-11-26 11:46:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2023-11-26 11:46:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-26 11:46:34,226 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2023-11-26 11:46:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:34,226 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-26 11:46:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-26 11:46:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-26 11:46:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:46:34,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:34,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:34,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:46:34,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:34,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash -485999892, now seen corresponding path program 1 times [2023-11-26 11:46:34,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:34,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730855178] [2023-11-26 11:46:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:34,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:34,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:34,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730855178] [2023-11-26 11:46:34,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730855178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:34,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93320978] [2023-11-26 11:46:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:34,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:34,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:34,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:34,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:46:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:34,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:46:34,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:34,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:34,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93320978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:34,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:46:34,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-26 11:46:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920400289] [2023-11-26 11:46:34,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:34,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:46:34,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:34,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:46:34,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:46:34,713 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2023-11-26 11:46:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:34,860 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-11-26 11:46:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:46:34,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 [2023-11-26 11:46:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:34,862 INFO L225 Difference]: With dead ends: 42 [2023-11-26 11:46:34,862 INFO L226 Difference]: Without dead ends: 28 [2023-11-26 11:46:34,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:46:34,875 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:34,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:46:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-26 11:46:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-26 11:46:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-11-26 11:46:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-26 11:46:34,891 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2023-11-26 11:46:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:34,891 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-26 11:46:34,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2023-11-26 11:46:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-26 11:46:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-26 11:46:34,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:34,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:34,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:35,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:35,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:35,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash -105964608, now seen corresponding path program 1 times [2023-11-26 11:46:35,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:35,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883952177] [2023-11-26 11:46:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:35,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:35,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:35,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883952177] [2023-11-26 11:46:35,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883952177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:35,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891391222] [2023-11-26 11:46:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:35,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:35,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:46:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:36,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:46:36,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:36,083 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 [2023-11-26 11:46:36,174 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 11 treesize of output 7 [2023-11-26 11:46:36,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-26 11:46:36,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-26 11:46:36,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:46:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:36,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:36,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-26 11:46:36,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-11-26 11:46:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:36,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891391222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:36,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:46:36,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2023-11-26 11:46:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103039361] [2023-11-26 11:46:36,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:36,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-26 11:46:36,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-26 11:46:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:46:36,631 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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) [2023-11-26 11:46:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:37,067 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-11-26 11:46:37,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:46:37,072 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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 22 [2023-11-26 11:46:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:37,073 INFO L225 Difference]: With dead ends: 49 [2023-11-26 11:46:37,073 INFO L226 Difference]: Without dead ends: 29 [2023-11-26 11:46:37,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 11:46:37,076 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:37,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 62 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:46:37,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-26 11:46:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-26 11:46:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2023-11-26 11:46:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-26 11:46:37,092 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2023-11-26 11:46:37,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:37,092 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-26 11:46:37,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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) [2023-11-26 11:46:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-26 11:46:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 11:46:37,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:37,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:37,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:37,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:37,304 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:37,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:37,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1605608937, now seen corresponding path program 2 times [2023-11-26 11:46:37,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:37,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224040092] [2023-11-26 11:46:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:37,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:37,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:37,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224040092] [2023-11-26 11:46:37,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224040092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:37,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023533675] [2023-11-26 11:46:37,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:46:37,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:37,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:37,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:37,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:46:37,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:46:37,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:46:37,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:46:37,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:37,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:37,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023533675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:37,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:46:37,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-26 11:46:37,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034464163] [2023-11-26 11:46:37,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:37,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 11:46:37,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 11:46:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:46:37,734 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2023-11-26 11:46:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:37,901 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2023-11-26 11:46:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:46:37,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 25 [2023-11-26 11:46:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:37,905 INFO L225 Difference]: With dead ends: 61 [2023-11-26 11:46:37,905 INFO L226 Difference]: Without dead ends: 36 [2023-11-26 11:46:37,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:46:37,907 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:37,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:46:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-26 11:46:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-11-26 11:46:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 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) [2023-11-26 11:46:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-26 11:46:37,919 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2023-11-26 11:46:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:37,921 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-26 11:46:37,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2023-11-26 11:46:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-26 11:46:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-26 11:46:37,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:37,923 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:37,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:38,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:46:38,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:38,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1537501251, now seen corresponding path program 3 times [2023-11-26 11:46:38,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:38,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447919283] [2023-11-26 11:46:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:38,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:39,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:39,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447919283] [2023-11-26 11:46:39,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447919283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:39,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983838324] [2023-11-26 11:46:39,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:46:39,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:39,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:39,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:39,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:46:39,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 11:46:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:46:39,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-26 11:46:39,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:39,798 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 19 treesize of output 1 [2023-11-26 11:46:39,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-26 11:46:40,840 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 11 treesize of output 7 [2023-11-26 11:46:40,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-26 11:46:41,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-26 11:46:41,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:46:41,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:46:41,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 40 [2023-11-26 11:46:41,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:46:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:46:41,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:46:42,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983838324] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:42,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:46:42,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2023-11-26 11:46:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012456446] [2023-11-26 11:46:42,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-26 11:46:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:42,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-26 11:46:42,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2170, Unknown=0, NotChecked=0, Total=2550 [2023-11-26 11:46:42,536 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 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) [2023-11-26 11:46:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:46,886 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2023-11-26 11:46:46,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-26 11:46:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 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 28 [2023-11-26 11:46:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:46,892 INFO L225 Difference]: With dead ends: 87 [2023-11-26 11:46:46,892 INFO L226 Difference]: Without dead ends: 71 [2023-11-26 11:46:46,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1321, Invalid=6335, Unknown=0, NotChecked=0, Total=7656 [2023-11-26 11:46:46,896 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 264 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:46,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 76 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-26 11:46:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-26 11:46:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2023-11-26 11:46:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 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) [2023-11-26 11:46:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-11-26 11:46:46,909 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 28 [2023-11-26 11:46:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:46,909 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-11-26 11:46:46,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 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) [2023-11-26 11:46:46,910 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-11-26 11:46:46,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:46:46,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:46,911 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:46,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:47,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:47,117 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:47,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash 699025757, now seen corresponding path program 4 times [2023-11-26 11:46:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:47,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653852835] [2023-11-26 11:46:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:47,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:47,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:47,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653852835] [2023-11-26 11:46:47,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653852835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:47,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915033506] [2023-11-26 11:46:47,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:46:47,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:47,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:47,318 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:47,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:46:47,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:46:47,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:46:47,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 11:46:47,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:47,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:48,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915033506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:48,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:46:48,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 38 [2023-11-26 11:46:48,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953028858] [2023-11-26 11:46:48,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:48,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-26 11:46:48,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:48,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-26 11:46:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 11:46:48,260 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 38 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) [2023-11-26 11:46:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:49,754 INFO L93 Difference]: Finished difference Result 147 states and 168 transitions. [2023-11-26 11:46:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-26 11:46:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 38 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) Word has length 34 [2023-11-26 11:46:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:49,755 INFO L225 Difference]: With dead ends: 147 [2023-11-26 11:46:49,756 INFO L226 Difference]: Without dead ends: 98 [2023-11-26 11:46:49,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=773, Invalid=4197, Unknown=0, NotChecked=0, Total=4970 [2023-11-26 11:46:49,759 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 181 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:49,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 143 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:46:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-26 11:46:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2023-11-26 11:46:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 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) [2023-11-26 11:46:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-11-26 11:46:49,785 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 34 [2023-11-26 11:46:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:49,785 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-11-26 11:46:49,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 38 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) [2023-11-26 11:46:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-11-26 11:46:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:46:49,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:49,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:49,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:49,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:49,996 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:49,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2038897950, now seen corresponding path program 5 times [2023-11-26 11:46:49,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:49,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977144252] [2023-11-26 11:46:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:49,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:51,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:51,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977144252] [2023-11-26 11:46:51,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977144252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:51,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130182901] [2023-11-26 11:46:51,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:46:51,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:51,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:51,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:46:51,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-26 11:46:51,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:46:51,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-26 11:46:51,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:51,999 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 [2023-11-26 11:46:52,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:46:52,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-26 11:46:52,309 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 11 treesize of output 7 [2023-11-26 11:46:52,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-26 11:46:52,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-26 11:46:52,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-11-26 11:46:52,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:46:52,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2023-11-26 11:46:52,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:46:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:52,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:53,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 91 [2023-11-26 11:46:53,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:46:53,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87446 treesize of output 81302 [2023-11-26 11:46:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130182901] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:54,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:46:54,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 51 [2023-11-26 11:46:54,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079996305] [2023-11-26 11:46:54,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:54,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-26 11:46:54,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-26 11:46:54,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2277, Unknown=0, NotChecked=0, Total=2550 [2023-11-26 11:46:54,176 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 51 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 states have internal predecessors, (95), 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) [2023-11-26 11:46:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:56,372 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2023-11-26 11:46:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:46:56,373 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 states have internal predecessors, (95), 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 34 [2023-11-26 11:46:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:56,375 INFO L225 Difference]: With dead ends: 75 [2023-11-26 11:46:56,375 INFO L226 Difference]: Without dead ends: 71 [2023-11-26 11:46:56,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=610, Invalid=4220, Unknown=0, NotChecked=0, Total=4830 [2023-11-26 11:46:56,380 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 137 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:56,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:46:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-26 11:46:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2023-11-26 11:46:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 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) [2023-11-26 11:46:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2023-11-26 11:46:56,415 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 34 [2023-11-26 11:46:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:56,415 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2023-11-26 11:46:56,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 51 states have internal predecessors, (95), 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) [2023-11-26 11:46:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2023-11-26 11:46:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-26 11:46:56,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:56,420 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:56,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:56,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:56,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:56,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:56,627 INFO L85 PathProgramCache]: Analyzing trace with hash 214954887, now seen corresponding path program 6 times [2023-11-26 11:46:56,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:56,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342876982] [2023-11-26 11:46:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:56,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342876982] [2023-11-26 11:46:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342876982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752670469] [2023-11-26 11:46:56,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:46:56,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:56,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:56,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:56,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:46:56,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-26 11:46:56,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:46:56,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:46:56,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:57,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:57,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752670469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:57,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:46:57,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-26 11:46:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957817270] [2023-11-26 11:46:57,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:57,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:46:57,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:57,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:46:57,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:46:57,215 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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) [2023-11-26 11:46:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:57,412 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2023-11-26 11:46:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:46:57,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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 37 [2023-11-26 11:46:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:57,414 INFO L225 Difference]: With dead ends: 97 [2023-11-26 11:46:57,414 INFO L226 Difference]: Without dead ends: 76 [2023-11-26 11:46:57,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:46:57,416 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:57,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 25 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:46:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-26 11:46:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2023-11-26 11:46:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 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) [2023-11-26 11:46:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-11-26 11:46:57,444 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 37 [2023-11-26 11:46:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:57,444 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-11-26 11:46:57,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 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) [2023-11-26 11:46:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-11-26 11:46:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-26 11:46:57,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:57,446 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:46:57,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-26 11:46:57,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:57,653 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:57,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:57,653 INFO L85 PathProgramCache]: Analyzing trace with hash -45591649, now seen corresponding path program 7 times [2023-11-26 11:46:57,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:57,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614405008] [2023-11-26 11:46:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:57,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:46:59,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:59,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614405008] [2023-11-26 11:46:59,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614405008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:59,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200878973] [2023-11-26 11:46:59,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:46:59,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:59,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:59,979 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:00,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:47:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:00,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-26 11:47:00,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:00,112 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 [2023-11-26 11:47:00,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:47:00,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-26 11:47:00,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-11-26 11:47:00,635 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 11 treesize of output 7 [2023-11-26 11:47:00,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-26 11:47:01,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-26 11:47:01,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-11-26 11:47:01,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-11-26 11:47:01,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:01,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 24 [2023-11-26 11:47:01,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:47:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:01,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:03,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 151 [2023-11-26 11:47:04,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:47:04,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96829970122 treesize of output 92535002826 [2023-11-26 11:47:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:07,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200878973] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:07,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:07,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 64 [2023-11-26 11:47:07,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527130279] [2023-11-26 11:47:07,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-26 11:47:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:07,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-26 11:47:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=3572, Unknown=0, NotChecked=0, Total=4032 [2023-11-26 11:47:07,753 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 64 states, 64 states have (on average 1.65625) internal successors, (106), 64 states have internal predecessors, (106), 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) [2023-11-26 11:47:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:11,404 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2023-11-26 11:47:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 11:47:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.65625) internal successors, (106), 64 states have internal predecessors, (106), 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 40 [2023-11-26 11:47:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:11,405 INFO L225 Difference]: With dead ends: 84 [2023-11-26 11:47:11,406 INFO L226 Difference]: Without dead ends: 80 [2023-11-26 11:47:11,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=928, Invalid=6728, Unknown=0, NotChecked=0, Total=7656 [2023-11-26 11:47:11,410 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:11,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 102 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-26 11:47:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-26 11:47:11,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2023-11-26 11:47:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 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) [2023-11-26 11:47:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2023-11-26 11:47:11,428 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 40 [2023-11-26 11:47:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:11,429 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2023-11-26 11:47:11,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.65625) internal successors, (106), 64 states have internal predecessors, (106), 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) [2023-11-26 11:47:11,429 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2023-11-26 11:47:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-26 11:47:11,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:11,430 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:11,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:11,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:11,635 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:11,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash 585133482, now seen corresponding path program 8 times [2023-11-26 11:47:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:11,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035491895] [2023-11-26 11:47:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:11,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035491895] [2023-11-26 11:47:11,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035491895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352359635] [2023-11-26 11:47:11,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:47:11,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:11,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:11,900 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:11,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:47:12,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:47:12,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:12,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:47:12,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:12,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:12,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352359635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:12,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:12,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-26 11:47:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781717591] [2023-11-26 11:47:12,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:12,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 11:47:12,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 11:47:12,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:47:12,485 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2023-11-26 11:47:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:12,824 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2023-11-26 11:47:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:47:12,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) Word has length 43 [2023-11-26 11:47:12,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:12,825 INFO L225 Difference]: With dead ends: 109 [2023-11-26 11:47:12,825 INFO L226 Difference]: Without dead ends: 85 [2023-11-26 11:47:12,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:47:12,826 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:12,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:47:12,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-26 11:47:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2023-11-26 11:47:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 72 states have internal predecessors, (77), 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) [2023-11-26 11:47:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2023-11-26 11:47:12,852 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 43 [2023-11-26 11:47:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:12,852 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2023-11-26 11:47:12,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 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) [2023-11-26 11:47:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2023-11-26 11:47:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-26 11:47:12,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:12,854 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:47:12,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:13,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:47:13,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:13,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash 623270850, now seen corresponding path program 9 times [2023-11-26 11:47:13,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:13,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631324549] [2023-11-26 11:47:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:13,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631324549] [2023-11-26 11:47:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631324549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356361912] [2023-11-26 11:47:16,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:47:16,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:16,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:16,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4646624d-e7df-491d-870c-c26820a78c4b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:47:16,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-26 11:47:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:47:16,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-26 11:47:16,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:17,169 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 11 treesize of output 7 [2023-11-26 11:47:17,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:47:17,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-26 11:47:17,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-11-26 11:47:18,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41