./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f774b3e755d7b6f786f7d23823d008ce09be620750647481355094233fd1ac8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:31:52,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:31:52,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:31:52,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:31:52,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:31:52,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:31:52,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:31:52,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:31:52,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:31:52,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:31:52,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:31:52,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:31:52,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:31:52,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:31:52,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:31:52,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:31:52,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:31:52,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:31:52,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:31:52,270 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:31:52,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:31:52,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:31:52,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:31:52,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:31:52,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:31:52,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:31:52,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:31:52,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:31:52,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:31:52,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:31:52,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:31:52,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:31:52,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:31:52,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:31:52,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:31:52,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:31:52,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:31:52,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:31:52,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:31:52,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:31:52,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:31:52,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:31:52,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:31:52,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:31:52,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:31:52,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:31:52,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:31:52,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:31:52,359 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:31:52,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:31:52,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:31:52,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:31:52,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:31:52,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:31:52,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:31:52,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:31:52,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:31:52,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:31:52,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:31:52,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:31:52,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:31:52,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:31:52,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:31:52,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:31:52,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:31:52,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:31:52,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:31:52,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:31:52,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:31:52,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:31:52,365 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:31:52,367 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:31:52,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:31:52,368 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:31:52,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f774b3e755d7b6f786f7d23823d008ce09be620750647481355094233fd1ac8 [2021-11-07 08:31:52,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:31:52,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:31:52,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:31:52,652 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:31:52,653 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:31:52,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 08:31:52,753 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/data/0f9c5318e/72ea9eaa92f14f4da1f6511e070494e1/FLAG28a67c1cd [2021-11-07 08:31:53,313 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:31:53,316 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 08:31:53,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/data/0f9c5318e/72ea9eaa92f14f4da1f6511e070494e1/FLAG28a67c1cd [2021-11-07 08:31:53,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/data/0f9c5318e/72ea9eaa92f14f4da1f6511e070494e1 [2021-11-07 08:31:53,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:31:53,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:31:53,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:31:53,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:31:53,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:31:53,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:31:53" (1/1) ... [2021-11-07 08:31:53,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f4e017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:53, skipping insertion in model container [2021-11-07 08:31:53,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:31:53" (1/1) ... [2021-11-07 08:31:53,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:31:53,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:31:53,990 WARN L228 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_2f5ba091-83eb-4379-a297-b498df8a277e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2021-11-07 08:31:54,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:31:54,040 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:31:54,089 WARN L228 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_2f5ba091-83eb-4379-a297-b498df8a277e/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[7471,7484] [2021-11-07 08:31:54,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:31:54,153 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:31:54,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54 WrapperNode [2021-11-07 08:31:54,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:31:54,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:31:54,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:31:54,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:31:54,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:31:54,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:31:54,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:31:54,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:31:54,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:31:54,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:31:54,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:31:54,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:31:54,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (1/1) ... [2021-11-07 08:31:54,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:31:54,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:31:54,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:31:54,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:31:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:31:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:31:54,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:31:54,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:31:55,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:31:55,222 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 08:31:55,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:55 BoogieIcfgContainer [2021-11-07 08:31:55,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:31:55,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:31:55,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:31:55,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:31:55,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:31:53" (1/3) ... [2021-11-07 08:31:55,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ca8083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:31:55, skipping insertion in model container [2021-11-07 08:31:55,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:31:54" (2/3) ... [2021-11-07 08:31:55,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72ca8083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:31:55, skipping insertion in model container [2021-11-07 08:31:55,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:31:55" (3/3) ... [2021-11-07 08:31:55,249 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-11-07 08:31:55,254 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:31:55,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:31:55,351 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:31:55,361 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:31:55,361 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:31:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.7123287671232876) internal successors, (250), 147 states have internal predecessors, (250), 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) [2021-11-07 08:31:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 08:31:55,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:55,403 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:55,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:55,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1935961454, now seen corresponding path program 1 times [2021-11-07 08:31:55,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:55,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882697581] [2021-11-07 08:31:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:55,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:55,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:55,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882697581] [2021-11-07 08:31:55,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882697581] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:55,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:55,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:55,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906620575] [2021-11-07 08:31:55,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:55,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:55,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:55,939 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.7123287671232876) internal successors, (250), 147 states have internal predecessors, (250), 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 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-07 08:31:56,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:56,092 INFO L93 Difference]: Finished difference Result 286 states and 465 transitions. [2021-11-07 08:31:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:56,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 08:31:56,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:56,115 INFO L225 Difference]: With dead ends: 286 [2021-11-07 08:31:56,115 INFO L226 Difference]: Without dead ends: 218 [2021-11-07 08:31:56,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-07 08:31:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2021-11-07 08:31:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.4837209302325582) internal successors, (319), 215 states have internal predecessors, (319), 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) [2021-11-07 08:31:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 319 transitions. [2021-11-07 08:31:56,208 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 319 transitions. Word has length 49 [2021-11-07 08:31:56,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:56,211 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 319 transitions. [2021-11-07 08:31:56,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2021-11-07 08:31:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 319 transitions. [2021-11-07 08:31:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:31:56,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:56,217 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:56,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:31:56,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:56,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1118200662, now seen corresponding path program 1 times [2021-11-07 08:31:56,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:56,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092734694] [2021-11-07 08:31:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:56,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:56,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:56,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092734694] [2021-11-07 08:31:56,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092734694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:56,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:56,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:56,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699243872] [2021-11-07 08:31:56,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:56,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:56,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:56,393 INFO L87 Difference]: Start difference. First operand 216 states and 319 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2021-11-07 08:31:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:56,476 INFO L93 Difference]: Finished difference Result 522 states and 789 transitions. [2021-11-07 08:31:56,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 52 [2021-11-07 08:31:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:56,488 INFO L225 Difference]: With dead ends: 522 [2021-11-07 08:31:56,488 INFO L226 Difference]: Without dead ends: 370 [2021-11-07 08:31:56,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-07 08:31:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 368. [2021-11-07 08:31:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.4850136239782017) internal successors, (545), 367 states have internal predecessors, (545), 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) [2021-11-07 08:31:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 545 transitions. [2021-11-07 08:31:56,548 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 545 transitions. Word has length 52 [2021-11-07 08:31:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:56,548 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 545 transitions. [2021-11-07 08:31:56,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2021-11-07 08:31:56,549 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 545 transitions. [2021-11-07 08:31:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:31:56,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:56,551 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:56,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:31:56,552 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:56,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:56,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1570903849, now seen corresponding path program 1 times [2021-11-07 08:31:56,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:56,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583409985] [2021-11-07 08:31:56,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:56,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:56,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:56,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583409985] [2021-11-07 08:31:56,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583409985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:56,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:56,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:56,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505844622] [2021-11-07 08:31:56,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:56,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:56,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:56,638 INFO L87 Difference]: Start difference. First operand 368 states and 545 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2021-11-07 08:31:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:56,728 INFO L93 Difference]: Finished difference Result 884 states and 1325 transitions. [2021-11-07 08:31:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 52 [2021-11-07 08:31:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:56,734 INFO L225 Difference]: With dead ends: 884 [2021-11-07 08:31:56,734 INFO L226 Difference]: Without dead ends: 628 [2021-11-07 08:31:56,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-07 08:31:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2021-11-07 08:31:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.4704) internal successors, (919), 625 states have internal predecessors, (919), 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) [2021-11-07 08:31:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 919 transitions. [2021-11-07 08:31:56,807 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 919 transitions. Word has length 52 [2021-11-07 08:31:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:56,808 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 919 transitions. [2021-11-07 08:31:56,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2021-11-07 08:31:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 919 transitions. [2021-11-07 08:31:56,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:31:56,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:56,812 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:56,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:31:56,813 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:56,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:56,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1320706551, now seen corresponding path program 1 times [2021-11-07 08:31:56,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:56,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577398648] [2021-11-07 08:31:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:56,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:56,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:56,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577398648] [2021-11-07 08:31:56,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577398648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:56,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:56,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:31:56,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840133977] [2021-11-07 08:31:56,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:31:56,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:56,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:31:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:56,872 INFO L87 Difference]: Start difference. First operand 626 states and 919 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2021-11-07 08:31:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:56,962 INFO L93 Difference]: Finished difference Result 1644 states and 2427 transitions. [2021-11-07 08:31:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:31:56,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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 52 [2021-11-07 08:31:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:56,969 INFO L225 Difference]: With dead ends: 1644 [2021-11-07 08:31:56,970 INFO L226 Difference]: Without dead ends: 1106 [2021-11-07 08:31:56,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:31:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-11-07 08:31:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1104. [2021-11-07 08:31:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 1.4406165004533091) internal successors, (1589), 1103 states have internal predecessors, (1589), 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) [2021-11-07 08:31:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1589 transitions. [2021-11-07 08:31:57,033 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1589 transitions. Word has length 52 [2021-11-07 08:31:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:57,033 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1589 transitions. [2021-11-07 08:31:57,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 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) [2021-11-07 08:31:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1589 transitions. [2021-11-07 08:31:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:31:57,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:57,043 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:57,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:31:57,044 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:57,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1834372633, now seen corresponding path program 1 times [2021-11-07 08:31:57,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:57,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159029483] [2021-11-07 08:31:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:57,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:57,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:57,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159029483] [2021-11-07 08:31:57,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159029483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:57,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:57,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:31:57,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857268387] [2021-11-07 08:31:57,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:31:57,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:57,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:31:57,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:57,232 INFO L87 Difference]: Start difference. First operand 1104 states and 1589 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2021-11-07 08:31:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:57,459 INFO L93 Difference]: Finished difference Result 3406 states and 4991 transitions. [2021-11-07 08:31:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:31:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 53 [2021-11-07 08:31:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:57,476 INFO L225 Difference]: With dead ends: 3406 [2021-11-07 08:31:57,476 INFO L226 Difference]: Without dead ends: 2732 [2021-11-07 08:31:57,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:31:57,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-11-07 08:31:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1311. [2021-11-07 08:31:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 1310 states have (on average 1.448854961832061) internal successors, (1898), 1310 states have internal predecessors, (1898), 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) [2021-11-07 08:31:57,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 1898 transitions. [2021-11-07 08:31:57,606 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 1898 transitions. Word has length 53 [2021-11-07 08:31:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:57,606 INFO L470 AbstractCegarLoop]: Abstraction has 1311 states and 1898 transitions. [2021-11-07 08:31:57,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2021-11-07 08:31:57,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 1898 transitions. [2021-11-07 08:31:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:31:57,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:57,609 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:57,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:31:57,610 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:57,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1785989049, now seen corresponding path program 1 times [2021-11-07 08:31:57,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:57,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202826773] [2021-11-07 08:31:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:57,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:57,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:57,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202826773] [2021-11-07 08:31:57,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202826773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:57,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:57,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:31:57,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974275827] [2021-11-07 08:31:57,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:31:57,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:57,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:31:57,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:57,702 INFO L87 Difference]: Start difference. First operand 1311 states and 1898 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-07 08:31:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:58,007 INFO L93 Difference]: Finished difference Result 3051 states and 4422 transitions. [2021-11-07 08:31:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:31:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-07 08:31:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:58,026 INFO L225 Difference]: With dead ends: 3051 [2021-11-07 08:31:58,027 INFO L226 Difference]: Without dead ends: 1818 [2021-11-07 08:31:58,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:31:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-11-07 08:31:58,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1806. [2021-11-07 08:31:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 1.434349030470914) internal successors, (2589), 1805 states have internal predecessors, (2589), 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) [2021-11-07 08:31:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2589 transitions. [2021-11-07 08:31:58,182 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2589 transitions. Word has length 53 [2021-11-07 08:31:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:58,182 INFO L470 AbstractCegarLoop]: Abstraction has 1806 states and 2589 transitions. [2021-11-07 08:31:58,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-07 08:31:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2589 transitions. [2021-11-07 08:31:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:31:58,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:58,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:58,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:31:58,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1176645599, now seen corresponding path program 1 times [2021-11-07 08:31:58,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:58,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18734507] [2021-11-07 08:31:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:58,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:58,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:58,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18734507] [2021-11-07 08:31:58,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18734507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:58,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:58,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:31:58,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305760762] [2021-11-07 08:31:58,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:31:58,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:58,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:31:58,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:58,275 INFO L87 Difference]: Start difference. First operand 1806 states and 2589 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 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) [2021-11-07 08:31:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:58,646 INFO L93 Difference]: Finished difference Result 4237 states and 6075 transitions. [2021-11-07 08:31:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:31:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 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) Word has length 54 [2021-11-07 08:31:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:58,661 INFO L225 Difference]: With dead ends: 4237 [2021-11-07 08:31:58,661 INFO L226 Difference]: Without dead ends: 2518 [2021-11-07 08:31:58,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:31:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-11-07 08:31:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1806. [2021-11-07 08:31:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 1.4204986149584486) internal successors, (2564), 1805 states have internal predecessors, (2564), 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) [2021-11-07 08:31:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2564 transitions. [2021-11-07 08:31:58,807 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2564 transitions. Word has length 54 [2021-11-07 08:31:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:58,809 INFO L470 AbstractCegarLoop]: Abstraction has 1806 states and 2564 transitions. [2021-11-07 08:31:58,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 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) [2021-11-07 08:31:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2564 transitions. [2021-11-07 08:31:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:31:58,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:58,811 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:58,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:31:58,812 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2121579715, now seen corresponding path program 1 times [2021-11-07 08:31:58,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:58,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704142664] [2021-11-07 08:31:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:58,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:58,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:58,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704142664] [2021-11-07 08:31:58,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704142664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:58,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:58,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:31:58,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54179191] [2021-11-07 08:31:58,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:31:58,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:58,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:31:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:58,927 INFO L87 Difference]: Start difference. First operand 1806 states and 2564 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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) [2021-11-07 08:31:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:31:59,332 INFO L93 Difference]: Finished difference Result 5136 states and 7370 transitions. [2021-11-07 08:31:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:31:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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) Word has length 54 [2021-11-07 08:31:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:31:59,355 INFO L225 Difference]: With dead ends: 5136 [2021-11-07 08:31:59,356 INFO L226 Difference]: Without dead ends: 4138 [2021-11-07 08:31:59,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-11-07 08:31:59,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 2157. [2021-11-07 08:31:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 1.4267161410018554) internal successors, (3076), 2156 states have internal predecessors, (3076), 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) [2021-11-07 08:31:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3076 transitions. [2021-11-07 08:31:59,583 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3076 transitions. Word has length 54 [2021-11-07 08:31:59,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:31:59,584 INFO L470 AbstractCegarLoop]: Abstraction has 2157 states and 3076 transitions. [2021-11-07 08:31:59,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 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) [2021-11-07 08:31:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3076 transitions. [2021-11-07 08:31:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:31:59,586 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:31:59,586 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:31:59,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:31:59,587 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:31:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:31:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1977718599, now seen corresponding path program 1 times [2021-11-07 08:31:59,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:31:59,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045170714] [2021-11-07 08:31:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:31:59,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:31:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:31:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:31:59,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:31:59,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045170714] [2021-11-07 08:31:59,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045170714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:31:59,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:31:59,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:31:59,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245096466] [2021-11-07 08:31:59,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:31:59,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:31:59,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:31:59,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:31:59,659 INFO L87 Difference]: Start difference. First operand 2157 states and 3076 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-07 08:32:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:00,083 INFO L93 Difference]: Finished difference Result 5521 states and 7924 transitions. [2021-11-07 08:32:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:32:00,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 55 [2021-11-07 08:32:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:00,108 INFO L225 Difference]: With dead ends: 5521 [2021-11-07 08:32:00,109 INFO L226 Difference]: Without dead ends: 4523 [2021-11-07 08:32:00,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:32:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2021-11-07 08:32:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 2691. [2021-11-07 08:32:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 1.4345724907063198) internal successors, (3859), 2690 states have internal predecessors, (3859), 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) [2021-11-07 08:32:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 3859 transitions. [2021-11-07 08:32:00,384 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 3859 transitions. Word has length 55 [2021-11-07 08:32:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:00,385 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 3859 transitions. [2021-11-07 08:32:00,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2021-11-07 08:32:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 3859 transitions. [2021-11-07 08:32:00,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:32:00,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:00,387 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:00,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:32:00,388 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1089404270, now seen corresponding path program 1 times [2021-11-07 08:32:00,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:00,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183978517] [2021-11-07 08:32:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:00,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:00,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:00,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183978517] [2021-11-07 08:32:00,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183978517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:00,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:00,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:32:00,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933993262] [2021-11-07 08:32:00,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:32:00,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:32:00,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:32:00,441 INFO L87 Difference]: Start difference. First operand 2691 states and 3859 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:00,939 INFO L93 Difference]: Finished difference Result 6276 states and 8995 transitions. [2021-11-07 08:32:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:32:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 08:32:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:00,959 INFO L225 Difference]: With dead ends: 6276 [2021-11-07 08:32:00,960 INFO L226 Difference]: Without dead ends: 3627 [2021-11-07 08:32:00,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:32:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2021-11-07 08:32:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 3607. [2021-11-07 08:32:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3606 states have (on average 1.4195784803105935) internal successors, (5119), 3606 states have internal predecessors, (5119), 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) [2021-11-07 08:32:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 5119 transitions. [2021-11-07 08:32:01,342 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 5119 transitions. Word has length 58 [2021-11-07 08:32:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:01,343 INFO L470 AbstractCegarLoop]: Abstraction has 3607 states and 5119 transitions. [2021-11-07 08:32:01,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 5119 transitions. [2021-11-07 08:32:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:32:01,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:01,345 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:01,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:32:01,346 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:01,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1572096567, now seen corresponding path program 1 times [2021-11-07 08:32:01,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:01,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228424748] [2021-11-07 08:32:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:01,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:01,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:01,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228424748] [2021-11-07 08:32:01,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228424748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:01,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:01,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:32:01,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242936127] [2021-11-07 08:32:01,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:32:01,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:32:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:32:01,416 INFO L87 Difference]: Start difference. First operand 3607 states and 5119 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 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) [2021-11-07 08:32:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:03,108 INFO L93 Difference]: Finished difference Result 15759 states and 22349 transitions. [2021-11-07 08:32:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:32:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 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 59 [2021-11-07 08:32:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:03,169 INFO L225 Difference]: With dead ends: 15759 [2021-11-07 08:32:03,169 INFO L226 Difference]: Without dead ends: 14704 [2021-11-07 08:32:03,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:32:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14704 states. [2021-11-07 08:32:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14704 to 3619. [2021-11-07 08:32:03,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 1.4192924267551132) internal successors, (5135), 3618 states have internal predecessors, (5135), 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) [2021-11-07 08:32:03,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 5135 transitions. [2021-11-07 08:32:03,658 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 5135 transitions. Word has length 59 [2021-11-07 08:32:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:03,658 INFO L470 AbstractCegarLoop]: Abstraction has 3619 states and 5135 transitions. [2021-11-07 08:32:03,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 6 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) [2021-11-07 08:32:03,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 5135 transitions. [2021-11-07 08:32:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:32:03,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:03,661 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:03,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:32:03,661 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:03,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1131093665, now seen corresponding path program 1 times [2021-11-07 08:32:03,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:03,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114960004] [2021-11-07 08:32:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:03,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:03,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:03,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114960004] [2021-11-07 08:32:03,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114960004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:03,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:03,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:32:03,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621762670] [2021-11-07 08:32:03,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:32:03,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:32:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:32:03,728 INFO L87 Difference]: Start difference. First operand 3619 states and 5135 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 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) [2021-11-07 08:32:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:05,208 INFO L93 Difference]: Finished difference Result 13792 states and 19458 transitions. [2021-11-07 08:32:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:32:05,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 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 60 [2021-11-07 08:32:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:05,239 INFO L225 Difference]: With dead ends: 13792 [2021-11-07 08:32:05,239 INFO L226 Difference]: Without dead ends: 12006 [2021-11-07 08:32:05,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:32:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12006 states. [2021-11-07 08:32:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12006 to 3639. [2021-11-07 08:32:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 1.4180868609125894) internal successors, (5159), 3638 states have internal predecessors, (5159), 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) [2021-11-07 08:32:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 5159 transitions. [2021-11-07 08:32:05,800 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 5159 transitions. Word has length 60 [2021-11-07 08:32:05,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:05,800 INFO L470 AbstractCegarLoop]: Abstraction has 3639 states and 5159 transitions. [2021-11-07 08:32:05,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 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) [2021-11-07 08:32:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 5159 transitions. [2021-11-07 08:32:05,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:32:05,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:05,803 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:05,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:32:05,803 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:05,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1840434496, now seen corresponding path program 1 times [2021-11-07 08:32:05,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:05,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530236027] [2021-11-07 08:32:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:05,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:05,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:05,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530236027] [2021-11-07 08:32:05,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530236027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:05,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:05,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:32:05,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224342530] [2021-11-07 08:32:05,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:32:05,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:05,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:32:05,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:32:05,873 INFO L87 Difference]: Start difference. First operand 3639 states and 5159 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 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) [2021-11-07 08:32:07,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:07,587 INFO L93 Difference]: Finished difference Result 16211 states and 22958 transitions. [2021-11-07 08:32:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:32:07,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 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 60 [2021-11-07 08:32:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:07,618 INFO L225 Difference]: With dead ends: 16211 [2021-11-07 08:32:07,618 INFO L226 Difference]: Without dead ends: 14531 [2021-11-07 08:32:07,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:32:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14531 states. [2021-11-07 08:32:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14531 to 3717. [2021-11-07 08:32:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3716 states have (on average 1.415231431646932) internal successors, (5259), 3716 states have internal predecessors, (5259), 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) [2021-11-07 08:32:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5259 transitions. [2021-11-07 08:32:08,124 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5259 transitions. Word has length 60 [2021-11-07 08:32:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:08,125 INFO L470 AbstractCegarLoop]: Abstraction has 3717 states and 5259 transitions. [2021-11-07 08:32:08,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 6 states have internal predecessors, (60), 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) [2021-11-07 08:32:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5259 transitions. [2021-11-07 08:32:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:32:08,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:08,128 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:08,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:32:08,129 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:08,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1556118219, now seen corresponding path program 1 times [2021-11-07 08:32:08,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:08,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347420749] [2021-11-07 08:32:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:08,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:08,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:08,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347420749] [2021-11-07 08:32:08,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347420749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:08,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:08,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 08:32:08,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139613657] [2021-11-07 08:32:08,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:32:08,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:08,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:32:08,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:32:08,416 INFO L87 Difference]: Start difference. First operand 3717 states and 5259 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:11,053 INFO L93 Difference]: Finished difference Result 12632 states and 17842 transitions. [2021-11-07 08:32:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:32:11,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:32:11,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:11,069 INFO L225 Difference]: With dead ends: 12632 [2021-11-07 08:32:11,070 INFO L226 Difference]: Without dead ends: 9547 [2021-11-07 08:32:11,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:32:11,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9547 states. [2021-11-07 08:32:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9547 to 3717. [2021-11-07 08:32:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3716 states have (on average 1.413616792249731) internal successors, (5253), 3716 states have internal predecessors, (5253), 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) [2021-11-07 08:32:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5253 transitions. [2021-11-07 08:32:11,718 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5253 transitions. Word has length 62 [2021-11-07 08:32:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:11,719 INFO L470 AbstractCegarLoop]: Abstraction has 3717 states and 5253 transitions. [2021-11-07 08:32:11,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5253 transitions. [2021-11-07 08:32:11,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:32:11,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:11,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:11,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:32:11,723 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:11,723 INFO L85 PathProgramCache]: Analyzing trace with hash -443125389, now seen corresponding path program 1 times [2021-11-07 08:32:11,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:11,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563685270] [2021-11-07 08:32:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:11,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:11,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:11,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563685270] [2021-11-07 08:32:11,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563685270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:11,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:11,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 08:32:11,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206773074] [2021-11-07 08:32:11,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:32:11,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:32:11,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:32:11,968 INFO L87 Difference]: Start difference. First operand 3717 states and 5253 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:15,273 INFO L93 Difference]: Finished difference Result 18335 states and 25952 transitions. [2021-11-07 08:32:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:32:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:32:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:15,299 INFO L225 Difference]: With dead ends: 18335 [2021-11-07 08:32:15,299 INFO L226 Difference]: Without dead ends: 15395 [2021-11-07 08:32:15,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:32:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15395 states. [2021-11-07 08:32:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15395 to 3643. [2021-11-07 08:32:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 3642 states have (on average 1.4104887424492036) internal successors, (5137), 3642 states have internal predecessors, (5137), 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) [2021-11-07 08:32:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 5137 transitions. [2021-11-07 08:32:15,987 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 5137 transitions. Word has length 62 [2021-11-07 08:32:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:15,987 INFO L470 AbstractCegarLoop]: Abstraction has 3643 states and 5137 transitions. [2021-11-07 08:32:15,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 5137 transitions. [2021-11-07 08:32:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:32:15,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:15,991 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:15,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:32:15,991 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1162737396, now seen corresponding path program 1 times [2021-11-07 08:32:15,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:15,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704937281] [2021-11-07 08:32:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:15,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:16,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:16,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704937281] [2021-11-07 08:32:16,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704937281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:16,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:16,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 08:32:16,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660946355] [2021-11-07 08:32:16,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:32:16,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:32:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:32:16,174 INFO L87 Difference]: Start difference. First operand 3643 states and 5137 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:18,687 INFO L93 Difference]: Finished difference Result 12259 states and 17312 transitions. [2021-11-07 08:32:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:32:18,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:32:18,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:18,697 INFO L225 Difference]: With dead ends: 12259 [2021-11-07 08:32:18,697 INFO L226 Difference]: Without dead ends: 9215 [2021-11-07 08:32:18,702 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:32:18,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9215 states. [2021-11-07 08:32:19,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9215 to 3511. [2021-11-07 08:32:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 1.406837606837607) internal successors, (4938), 3510 states have internal predecessors, (4938), 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) [2021-11-07 08:32:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 4938 transitions. [2021-11-07 08:32:19,301 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 4938 transitions. Word has length 62 [2021-11-07 08:32:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:19,302 INFO L470 AbstractCegarLoop]: Abstraction has 3511 states and 4938 transitions. [2021-11-07 08:32:19,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:32:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 4938 transitions. [2021-11-07 08:32:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:32:19,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:19,305 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:19,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:32:19,305 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1143949417, now seen corresponding path program 1 times [2021-11-07 08:32:19,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:19,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603016770] [2021-11-07 08:32:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:19,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:19,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:19,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603016770] [2021-11-07 08:32:19,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603016770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:19,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:19,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:19,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742361178] [2021-11-07 08:32:19,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:19,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:19,347 INFO L87 Difference]: Start difference. First operand 3511 states and 4938 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 08:32:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:19,823 INFO L93 Difference]: Finished difference Result 5145 states and 7261 transitions. [2021-11-07 08:32:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:19,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:32:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:19,828 INFO L225 Difference]: With dead ends: 5145 [2021-11-07 08:32:19,828 INFO L226 Difference]: Without dead ends: 3498 [2021-11-07 08:32:19,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-11-07 08:32:20,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3496. [2021-11-07 08:32:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3495 states have (on average 1.3908440629470673) internal successors, (4861), 3495 states have internal predecessors, (4861), 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) [2021-11-07 08:32:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 4861 transitions. [2021-11-07 08:32:20,474 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 4861 transitions. Word has length 63 [2021-11-07 08:32:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:20,474 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 4861 transitions. [2021-11-07 08:32:20,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 08:32:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 4861 transitions. [2021-11-07 08:32:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:32:20,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:20,476 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:20,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:32:20,476 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:20,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:20,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1363691260, now seen corresponding path program 1 times [2021-11-07 08:32:20,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:20,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120844263] [2021-11-07 08:32:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:20,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:20,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:20,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120844263] [2021-11-07 08:32:20,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120844263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:20,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:20,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:20,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690401406] [2021-11-07 08:32:20,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:20,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:20,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:20,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:20,516 INFO L87 Difference]: Start difference. First operand 3496 states and 4861 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 08:32:20,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:20,962 INFO L93 Difference]: Finished difference Result 4643 states and 6458 transitions. [2021-11-07 08:32:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:20,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:32:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:20,965 INFO L225 Difference]: With dead ends: 4643 [2021-11-07 08:32:20,965 INFO L226 Difference]: Without dead ends: 3010 [2021-11-07 08:32:20,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2021-11-07 08:32:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2021-11-07 08:32:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.365147988027935) internal successors, (4105), 3007 states have internal predecessors, (4105), 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) [2021-11-07 08:32:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4105 transitions. [2021-11-07 08:32:21,353 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4105 transitions. Word has length 63 [2021-11-07 08:32:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:21,353 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4105 transitions. [2021-11-07 08:32:21,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 08:32:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4105 transitions. [2021-11-07 08:32:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:32:21,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:21,356 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:21,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:32:21,357 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1254313906, now seen corresponding path program 1 times [2021-11-07 08:32:21,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:21,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288080631] [2021-11-07 08:32:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:21,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:21,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:21,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288080631] [2021-11-07 08:32:21,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288080631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:21,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:21,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:21,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899411529] [2021-11-07 08:32:21,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:21,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:21,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:21,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:21,397 INFO L87 Difference]: Start difference. First operand 3008 states and 4105 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 08:32:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:21,828 INFO L93 Difference]: Finished difference Result 3626 states and 4928 transitions. [2021-11-07 08:32:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:32:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:21,831 INFO L225 Difference]: With dead ends: 3626 [2021-11-07 08:32:21,831 INFO L226 Difference]: Without dead ends: 2645 [2021-11-07 08:32:21,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2021-11-07 08:32:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2643. [2021-11-07 08:32:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 1.3323239969719909) internal successors, (3520), 2642 states have internal predecessors, (3520), 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) [2021-11-07 08:32:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 3520 transitions. [2021-11-07 08:32:22,216 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 3520 transitions. Word has length 63 [2021-11-07 08:32:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:22,217 INFO L470 AbstractCegarLoop]: Abstraction has 2643 states and 3520 transitions. [2021-11-07 08:32:22,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-11-07 08:32:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 3520 transitions. [2021-11-07 08:32:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:32:22,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:22,220 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:22,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:32:22,220 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:22,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:22,221 INFO L85 PathProgramCache]: Analyzing trace with hash -424034558, now seen corresponding path program 1 times [2021-11-07 08:32:22,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:22,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386699681] [2021-11-07 08:32:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:22,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:23,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:23,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386699681] [2021-11-07 08:32:23,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386699681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:23,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:23,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-07 08:32:23,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436527532] [2021-11-07 08:32:23,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:32:23,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:23,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:32:23,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:32:23,045 INFO L87 Difference]: Start difference. First operand 2643 states and 3520 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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) [2021-11-07 08:32:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:29,071 INFO L93 Difference]: Finished difference Result 7003 states and 9428 transitions. [2021-11-07 08:32:29,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 08:32:29,071 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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 64 [2021-11-07 08:32:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:29,078 INFO L225 Difference]: With dead ends: 7003 [2021-11-07 08:32:29,079 INFO L226 Difference]: Without dead ends: 6889 [2021-11-07 08:32:29,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:32:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6889 states. [2021-11-07 08:32:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6889 to 2649. [2021-11-07 08:32:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2648 states have (on average 1.3319486404833838) internal successors, (3527), 2648 states have internal predecessors, (3527), 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) [2021-11-07 08:32:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3527 transitions. [2021-11-07 08:32:29,538 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3527 transitions. Word has length 64 [2021-11-07 08:32:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:29,538 INFO L470 AbstractCegarLoop]: Abstraction has 2649 states and 3527 transitions. [2021-11-07 08:32:29,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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) [2021-11-07 08:32:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3527 transitions. [2021-11-07 08:32:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:32:29,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:29,540 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:29,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 08:32:29,541 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash 250019910, now seen corresponding path program 1 times [2021-11-07 08:32:29,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:29,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950274426] [2021-11-07 08:32:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:29,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:30,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:30,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950274426] [2021-11-07 08:32:30,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950274426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:30,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:30,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-07 08:32:30,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621262524] [2021-11-07 08:32:30,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:32:30,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:32:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:32:30,236 INFO L87 Difference]: Start difference. First operand 2649 states and 3527 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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) [2021-11-07 08:32:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:35,011 INFO L93 Difference]: Finished difference Result 7705 states and 10400 transitions. [2021-11-07 08:32:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:32:35,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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 64 [2021-11-07 08:32:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:35,019 INFO L225 Difference]: With dead ends: 7705 [2021-11-07 08:32:35,019 INFO L226 Difference]: Without dead ends: 7591 [2021-11-07 08:32:35,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=395, Invalid=1675, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:32:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7591 states. [2021-11-07 08:32:35,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7591 to 2649. [2021-11-07 08:32:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2648 states have (on average 1.331570996978852) internal successors, (3526), 2648 states have internal predecessors, (3526), 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) [2021-11-07 08:32:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3526 transitions. [2021-11-07 08:32:35,507 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3526 transitions. Word has length 64 [2021-11-07 08:32:35,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:35,507 INFO L470 AbstractCegarLoop]: Abstraction has 2649 states and 3526 transitions. [2021-11-07 08:32:35,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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) [2021-11-07 08:32:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3526 transitions. [2021-11-07 08:32:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:32:35,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:35,510 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:35,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 08:32:35,510 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1940234754, now seen corresponding path program 1 times [2021-11-07 08:32:35,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:35,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34342745] [2021-11-07 08:32:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:35,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:36,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:36,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34342745] [2021-11-07 08:32:36,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34342745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:36,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:36,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-07 08:32:36,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880204870] [2021-11-07 08:32:36,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:32:36,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:36,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:32:36,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:32:36,317 INFO L87 Difference]: Start difference. First operand 2649 states and 3526 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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) [2021-11-07 08:32:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:41,497 INFO L93 Difference]: Finished difference Result 6472 states and 8712 transitions. [2021-11-07 08:32:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:32:41,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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 64 [2021-11-07 08:32:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:41,505 INFO L225 Difference]: With dead ends: 6472 [2021-11-07 08:32:41,505 INFO L226 Difference]: Without dead ends: 6358 [2021-11-07 08:32:41,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 08:32:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6358 states. [2021-11-07 08:32:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6358 to 2661. [2021-11-07 08:32:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 1.331203007518797) internal successors, (3541), 2660 states have internal predecessors, (3541), 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) [2021-11-07 08:32:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 3541 transitions. [2021-11-07 08:32:41,955 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 3541 transitions. Word has length 64 [2021-11-07 08:32:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:41,955 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 3541 transitions. [2021-11-07 08:32:41,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 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) [2021-11-07 08:32:41,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 3541 transitions. [2021-11-07 08:32:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:32:41,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:41,957 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:41,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 08:32:41,958 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:41,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1380487795, now seen corresponding path program 1 times [2021-11-07 08:32:41,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:41,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668068917] [2021-11-07 08:32:41,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:41,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:41,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:41,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668068917] [2021-11-07 08:32:41,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668068917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:41,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:41,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:41,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305829464] [2021-11-07 08:32:41,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:41,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:41,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:41,991 INFO L87 Difference]: Start difference. First operand 2661 states and 3541 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 08:32:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:42,705 INFO L93 Difference]: Finished difference Result 4830 states and 6477 transitions. [2021-11-07 08:32:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:42,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 08:32:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:42,709 INFO L225 Difference]: With dead ends: 4830 [2021-11-07 08:32:42,709 INFO L226 Difference]: Without dead ends: 3694 [2021-11-07 08:32:42,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2021-11-07 08:32:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 2541. [2021-11-07 08:32:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 1.3299212598425196) internal successors, (3378), 2540 states have internal predecessors, (3378), 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) [2021-11-07 08:32:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3378 transitions. [2021-11-07 08:32:43,133 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3378 transitions. Word has length 64 [2021-11-07 08:32:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:43,133 INFO L470 AbstractCegarLoop]: Abstraction has 2541 states and 3378 transitions. [2021-11-07 08:32:43,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 08:32:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3378 transitions. [2021-11-07 08:32:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:32:43,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:43,135 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:43,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 08:32:43,135 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1914859187, now seen corresponding path program 1 times [2021-11-07 08:32:43,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:43,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976014609] [2021-11-07 08:32:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:43,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:43,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:43,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976014609] [2021-11-07 08:32:43,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976014609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:43,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:43,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:43,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172476485] [2021-11-07 08:32:43,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:43,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:43,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:43,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:43,163 INFO L87 Difference]: Start difference. First operand 2541 states and 3378 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 08:32:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:43,792 INFO L93 Difference]: Finished difference Result 4616 states and 6190 transitions. [2021-11-07 08:32:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:43,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 08:32:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:43,795 INFO L225 Difference]: With dead ends: 4616 [2021-11-07 08:32:43,795 INFO L226 Difference]: Without dead ends: 3478 [2021-11-07 08:32:43,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-11-07 08:32:44,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2391. [2021-11-07 08:32:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 1.3297071129707112) internal successors, (3178), 2390 states have internal predecessors, (3178), 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) [2021-11-07 08:32:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 3178 transitions. [2021-11-07 08:32:44,250 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 3178 transitions. Word has length 64 [2021-11-07 08:32:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:44,250 INFO L470 AbstractCegarLoop]: Abstraction has 2391 states and 3178 transitions. [2021-11-07 08:32:44,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-07 08:32:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 3178 transitions. [2021-11-07 08:32:44,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:32:44,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:44,252 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:44,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 08:32:44,252 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:44,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:44,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1138559632, now seen corresponding path program 1 times [2021-11-07 08:32:44,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:44,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984763261] [2021-11-07 08:32:44,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:44,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:44,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:44,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984763261] [2021-11-07 08:32:44,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984763261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:44,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:44,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-07 08:32:44,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571500886] [2021-11-07 08:32:44,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:32:44,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:44,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:32:44,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:32:44,890 INFO L87 Difference]: Start difference. First operand 2391 states and 3178 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) [2021-11-07 08:32:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:48,636 INFO L93 Difference]: Finished difference Result 7057 states and 9524 transitions. [2021-11-07 08:32:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:32:48,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) Word has length 65 [2021-11-07 08:32:48,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:48,643 INFO L225 Difference]: With dead ends: 7057 [2021-11-07 08:32:48,644 INFO L226 Difference]: Without dead ends: 6878 [2021-11-07 08:32:48,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=283, Invalid=1123, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:32:48,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2021-11-07 08:32:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 2379. [2021-11-07 08:32:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 1.3288477712363331) internal successors, (3160), 2378 states have internal predecessors, (3160), 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) [2021-11-07 08:32:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3160 transitions. [2021-11-07 08:32:49,115 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3160 transitions. Word has length 65 [2021-11-07 08:32:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:49,115 INFO L470 AbstractCegarLoop]: Abstraction has 2379 states and 3160 transitions. [2021-11-07 08:32:49,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 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) [2021-11-07 08:32:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3160 transitions. [2021-11-07 08:32:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:32:49,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:49,118 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:49,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 08:32:49,118 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:49,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1339466768, now seen corresponding path program 1 times [2021-11-07 08:32:49,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:49,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106257087] [2021-11-07 08:32:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:49,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:49,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:49,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106257087] [2021-11-07 08:32:49,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106257087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:49,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:49,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-07 08:32:49,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494890239] [2021-11-07 08:32:49,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:32:49,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:49,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:32:49,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:32:49,763 INFO L87 Difference]: Start difference. First operand 2379 states and 3160 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2021-11-07 08:32:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:53,467 INFO L93 Difference]: Finished difference Result 5117 states and 6876 transitions. [2021-11-07 08:32:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:32:53,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) Word has length 65 [2021-11-07 08:32:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:53,472 INFO L225 Difference]: With dead ends: 5117 [2021-11-07 08:32:53,472 INFO L226 Difference]: Without dead ends: 4931 [2021-11-07 08:32:53,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:32:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2021-11-07 08:32:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 2354. [2021-11-07 08:32:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2353 states have (on average 1.3289417764555886) internal successors, (3127), 2353 states have internal predecessors, (3127), 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) [2021-11-07 08:32:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 3127 transitions. [2021-11-07 08:32:53,964 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 3127 transitions. Word has length 65 [2021-11-07 08:32:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:53,964 INFO L470 AbstractCegarLoop]: Abstraction has 2354 states and 3127 transitions. [2021-11-07 08:32:53,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 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) [2021-11-07 08:32:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 3127 transitions. [2021-11-07 08:32:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:32:53,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:53,967 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:53,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 08:32:53,968 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash -427633856, now seen corresponding path program 1 times [2021-11-07 08:32:53,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:53,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539302751] [2021-11-07 08:32:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:53,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:54,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:54,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539302751] [2021-11-07 08:32:54,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539302751] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:54,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:54,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:32:54,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84178987] [2021-11-07 08:32:54,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:32:54,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:54,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:32:54,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:32:54,035 INFO L87 Difference]: Start difference. First operand 2354 states and 3127 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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) [2021-11-07 08:32:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:54,563 INFO L93 Difference]: Finished difference Result 2360 states and 3130 transitions. [2021-11-07 08:32:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:32:54,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 68 [2021-11-07 08:32:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:54,566 INFO L225 Difference]: With dead ends: 2360 [2021-11-07 08:32:54,566 INFO L226 Difference]: Without dead ends: 2153 [2021-11-07 08:32:54,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:32:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2021-11-07 08:32:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 2149. [2021-11-07 08:32:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2148 states have (on average 1.3319366852886405) internal successors, (2861), 2148 states have internal predecessors, (2861), 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) [2021-11-07 08:32:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 2861 transitions. [2021-11-07 08:32:55,053 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 2861 transitions. Word has length 68 [2021-11-07 08:32:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:55,053 INFO L470 AbstractCegarLoop]: Abstraction has 2149 states and 2861 transitions. [2021-11-07 08:32:55,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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) [2021-11-07 08:32:55,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 2861 transitions. [2021-11-07 08:32:55,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:32:55,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:55,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:55,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 08:32:55,056 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:55,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1513353753, now seen corresponding path program 1 times [2021-11-07 08:32:55,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:55,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004009619] [2021-11-07 08:32:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:55,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:55,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:55,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004009619] [2021-11-07 08:32:55,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004009619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:55,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:55,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:55,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711088885] [2021-11-07 08:32:55,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:55,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:55,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:55,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:55,099 INFO L87 Difference]: Start difference. First operand 2149 states and 2861 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2021-11-07 08:32:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:55,924 INFO L93 Difference]: Finished difference Result 5308 states and 7175 transitions. [2021-11-07 08:32:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:55,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) Word has length 71 [2021-11-07 08:32:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:55,928 INFO L225 Difference]: With dead ends: 5308 [2021-11-07 08:32:55,928 INFO L226 Difference]: Without dead ends: 3651 [2021-11-07 08:32:55,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-11-07 08:32:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3431. [2021-11-07 08:32:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 1.339067055393586) internal successors, (4593), 3430 states have internal predecessors, (4593), 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) [2021-11-07 08:32:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 4593 transitions. [2021-11-07 08:32:56,761 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 4593 transitions. Word has length 71 [2021-11-07 08:32:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:56,761 INFO L470 AbstractCegarLoop]: Abstraction has 3431 states and 4593 transitions. [2021-11-07 08:32:56,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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) [2021-11-07 08:32:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 4593 transitions. [2021-11-07 08:32:56,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:32:56,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:56,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:56,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 08:32:56,763 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash 87467842, now seen corresponding path program 1 times [2021-11-07 08:32:56,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:56,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225987287] [2021-11-07 08:32:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:56,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:56,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:56,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225987287] [2021-11-07 08:32:56,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225987287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:56,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:56,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:56,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555650750] [2021-11-07 08:32:56,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:56,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:56,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:56,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:56,864 INFO L87 Difference]: Start difference. First operand 3431 states and 4593 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-07 08:32:58,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:32:58,398 INFO L93 Difference]: Finished difference Result 8999 states and 12131 transitions. [2021-11-07 08:32:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:32:58,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-07 08:32:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:32:58,404 INFO L225 Difference]: With dead ends: 8999 [2021-11-07 08:32:58,404 INFO L226 Difference]: Without dead ends: 6060 [2021-11-07 08:32:58,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6060 states. [2021-11-07 08:32:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6060 to 5622. [2021-11-07 08:32:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5622 states, 5621 states have (on average 1.3365949119373777) internal successors, (7513), 5621 states have internal predecessors, (7513), 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) [2021-11-07 08:32:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5622 states to 5622 states and 7513 transitions. [2021-11-07 08:32:59,709 INFO L78 Accepts]: Start accepts. Automaton has 5622 states and 7513 transitions. Word has length 72 [2021-11-07 08:32:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:32:59,709 INFO L470 AbstractCegarLoop]: Abstraction has 5622 states and 7513 transitions. [2021-11-07 08:32:59,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-07 08:32:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5622 states and 7513 transitions. [2021-11-07 08:32:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:32:59,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:32:59,712 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:32:59,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 08:32:59,713 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:32:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:32:59,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1178358807, now seen corresponding path program 1 times [2021-11-07 08:32:59,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:32:59,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717700753] [2021-11-07 08:32:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:32:59,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:32:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:32:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:32:59,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:32:59,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717700753] [2021-11-07 08:32:59,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717700753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:32:59,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:32:59,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:32:59,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073739997] [2021-11-07 08:32:59,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:32:59,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:32:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:32:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:32:59,759 INFO L87 Difference]: Start difference. First operand 5622 states and 7513 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) [2021-11-07 08:33:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:02,328 INFO L93 Difference]: Finished difference Result 15189 states and 20282 transitions. [2021-11-07 08:33:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:02,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) Word has length 74 [2021-11-07 08:33:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:02,339 INFO L225 Difference]: With dead ends: 15189 [2021-11-07 08:33:02,340 INFO L226 Difference]: Without dead ends: 9973 [2021-11-07 08:33:02,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9973 states. [2021-11-07 08:33:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 9179. [2021-11-07 08:33:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9179 states, 9178 states have (on average 1.3235999128350404) internal successors, (12148), 9178 states have internal predecessors, (12148), 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) [2021-11-07 08:33:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9179 states to 9179 states and 12148 transitions. [2021-11-07 08:33:04,592 INFO L78 Accepts]: Start accepts. Automaton has 9179 states and 12148 transitions. Word has length 74 [2021-11-07 08:33:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:04,592 INFO L470 AbstractCegarLoop]: Abstraction has 9179 states and 12148 transitions. [2021-11-07 08:33:04,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 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) [2021-11-07 08:33:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 9179 states and 12148 transitions. [2021-11-07 08:33:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:33:04,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:04,593 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:04,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 08:33:04,594 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1504202340, now seen corresponding path program 1 times [2021-11-07 08:33:04,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:04,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316008929] [2021-11-07 08:33:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:04,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:04,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:04,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316008929] [2021-11-07 08:33:04,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316008929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:04,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:04,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:33:04,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917253] [2021-11-07 08:33:04,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:33:04,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:04,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:33:04,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:33:04,660 INFO L87 Difference]: Start difference. First operand 9179 states and 12148 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-11-07 08:33:09,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:09,667 INFO L93 Difference]: Finished difference Result 18662 states and 24380 transitions. [2021-11-07 08:33:09,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:33:09,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 75 [2021-11-07 08:33:09,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:09,689 INFO L225 Difference]: With dead ends: 18662 [2021-11-07 08:33:09,689 INFO L226 Difference]: Without dead ends: 18660 [2021-11-07 08:33:09,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:33:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18660 states. [2021-11-07 08:33:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18660 to 9971. [2021-11-07 08:33:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9971 states, 9970 states have (on average 1.2978936810431294) internal successors, (12940), 9970 states have internal predecessors, (12940), 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) [2021-11-07 08:33:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9971 states to 9971 states and 12940 transitions. [2021-11-07 08:33:12,601 INFO L78 Accepts]: Start accepts. Automaton has 9971 states and 12940 transitions. Word has length 75 [2021-11-07 08:33:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:12,602 INFO L470 AbstractCegarLoop]: Abstraction has 9971 states and 12940 transitions. [2021-11-07 08:33:12,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2021-11-07 08:33:12,602 INFO L276 IsEmpty]: Start isEmpty. Operand 9971 states and 12940 transitions. [2021-11-07 08:33:12,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:33:12,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:12,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:12,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 08:33:12,604 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:12,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1668309570, now seen corresponding path program 1 times [2021-11-07 08:33:12,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:12,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829274458] [2021-11-07 08:33:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:12,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:12,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:12,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829274458] [2021-11-07 08:33:12,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829274458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:33:12,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:33:12,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:33:12,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148084400] [2021-11-07 08:33:12,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:33:12,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:33:12,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:12,642 INFO L87 Difference]: Start difference. First operand 9971 states and 12940 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-11-07 08:33:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:16,644 INFO L93 Difference]: Finished difference Result 24471 states and 31506 transitions. [2021-11-07 08:33:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:33:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 76 [2021-11-07 08:33:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:16,659 INFO L225 Difference]: With dead ends: 24471 [2021-11-07 08:33:16,659 INFO L226 Difference]: Without dead ends: 14921 [2021-11-07 08:33:16,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:33:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14921 states. [2021-11-07 08:33:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14921 to 14919. [2021-11-07 08:33:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14919 states, 14918 states have (on average 1.2666577289180856) internal successors, (18896), 14918 states have internal predecessors, (18896), 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) [2021-11-07 08:33:20,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14919 states to 14919 states and 18896 transitions. [2021-11-07 08:33:20,844 INFO L78 Accepts]: Start accepts. Automaton has 14919 states and 18896 transitions. Word has length 76 [2021-11-07 08:33:20,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:33:20,845 INFO L470 AbstractCegarLoop]: Abstraction has 14919 states and 18896 transitions. [2021-11-07 08:33:20,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2021-11-07 08:33:20,845 INFO L276 IsEmpty]: Start isEmpty. Operand 14919 states and 18896 transitions. [2021-11-07 08:33:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 08:33:20,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:33:20,849 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:33:20,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 08:33:20,849 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:33:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:33:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1627547032, now seen corresponding path program 1 times [2021-11-07 08:33:20,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:33:20,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629755727] [2021-11-07 08:33:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:20,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:33:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:20,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:33:20,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629755727] [2021-11-07 08:33:20,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629755727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:20,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847064376] [2021-11-07 08:33:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:33:20,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:33:20,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:33:20,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:33:20,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:33:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:33:21,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:33:21,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:33:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:33:23,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847064376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:33:23,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:33:23,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13] total 17 [2021-11-07 08:33:23,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522406765] [2021-11-07 08:33:23,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:33:23,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:33:23,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:33:23,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:33:23,732 INFO L87 Difference]: Start difference. First operand 14919 states and 18896 transitions. Second operand has 17 states, 17 states have (on average 10.882352941176471) internal successors, (185), 17 states have internal predecessors, (185), 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) [2021-11-07 08:33:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:33:56,099 INFO L93 Difference]: Finished difference Result 94189 states and 119337 transitions. [2021-11-07 08:33:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 08:33:56,100 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.882352941176471) internal successors, (185), 17 states have internal predecessors, (185), 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 95 [2021-11-07 08:33:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:33:56,247 INFO L225 Difference]: With dead ends: 94189 [2021-11-07 08:33:56,247 INFO L226 Difference]: Without dead ends: 79691 [2021-11-07 08:33:56,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1084, Invalid=4922, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:33:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79691 states. [2021-11-07 08:34:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79691 to 29363. [2021-11-07 08:34:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29363 states, 29362 states have (on average 1.2667052653089026) internal successors, (37193), 29362 states have internal predecessors, (37193), 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) [2021-11-07 08:34:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29363 states to 29363 states and 37193 transitions. [2021-11-07 08:34:06,656 INFO L78 Accepts]: Start accepts. Automaton has 29363 states and 37193 transitions. Word has length 95 [2021-11-07 08:34:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:06,657 INFO L470 AbstractCegarLoop]: Abstraction has 29363 states and 37193 transitions. [2021-11-07 08:34:06,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.882352941176471) internal successors, (185), 17 states have internal predecessors, (185), 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) [2021-11-07 08:34:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 29363 states and 37193 transitions. [2021-11-07 08:34:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 08:34:06,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:06,663 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:06,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:06,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:34:06,864 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1695624290, now seen corresponding path program 1 times [2021-11-07 08:34:06,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:06,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263809719] [2021-11-07 08:34:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:06,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:06,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:06,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263809719] [2021-11-07 08:34:06,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263809719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:06,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756437885] [2021-11-07 08:34:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:06,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:06,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:06,931 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:06,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:34:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:07,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:34:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:07,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756437885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:07,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:07,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-07 08:34:07,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723875486] [2021-11-07 08:34:07,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:34:07,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:34:07,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:34:07,861 INFO L87 Difference]: Start difference. First operand 29363 states and 37193 transitions. Second operand has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 states have internal predecessors, (195), 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) [2021-11-07 08:34:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:34:23,216 INFO L93 Difference]: Finished difference Result 69563 states and 87741 transitions. [2021-11-07 08:34:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:34:23,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 states have internal predecessors, (195), 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 103 [2021-11-07 08:34:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:34:23,268 INFO L225 Difference]: With dead ends: 69563 [2021-11-07 08:34:23,268 INFO L226 Difference]: Without dead ends: 40594 [2021-11-07 08:34:23,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:34:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40594 states. [2021-11-07 08:34:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40594 to 28051. [2021-11-07 08:34:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28051 states, 28050 states have (on average 1.2411408199643494) internal successors, (34814), 28050 states have internal predecessors, (34814), 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) [2021-11-07 08:34:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28051 states to 28051 states and 34814 transitions. [2021-11-07 08:34:33,256 INFO L78 Accepts]: Start accepts. Automaton has 28051 states and 34814 transitions. Word has length 103 [2021-11-07 08:34:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:34:33,256 INFO L470 AbstractCegarLoop]: Abstraction has 28051 states and 34814 transitions. [2021-11-07 08:34:33,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.5) internal successors, (195), 10 states have internal predecessors, (195), 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) [2021-11-07 08:34:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 28051 states and 34814 transitions. [2021-11-07 08:34:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 08:34:33,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:34:33,262 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:34:33,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:34:33,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 08:34:33,463 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:34:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:34:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1961657950, now seen corresponding path program 1 times [2021-11-07 08:34:33,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:34:33,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658379783] [2021-11-07 08:34:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:33,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:34:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:33,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:34:33,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658379783] [2021-11-07 08:34:33,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658379783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:33,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577483882] [2021-11-07 08:34:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:34:33,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:34:33,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:34:33,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:34:33,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f5ba091-83eb-4379-a297-b498df8a277e/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:34:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:34:33,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:34:33,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:34:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:34:34,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577483882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:34:34,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:34:34,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-07 08:34:34,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453792324] [2021-11-07 08:34:34,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:34:34,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:34:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:34:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:34:34,439 INFO L87 Difference]: Start difference. First operand 28051 states and 34814 transitions. Second operand has 10 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 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)