./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX --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 92be10af768295be2ee9c176bac2a7de85c1afeb202e4b441d20022190d8e93f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:35:37,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:35:37,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:35:37,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:35:37,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:35:37,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:35:37,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:35:37,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:35:37,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:35:37,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:35:37,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:35:37,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:35:37,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:35:37,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:35:37,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:35:37,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:35:37,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:35:37,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:35:37,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:35:37,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:35:37,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:35:37,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:35:37,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:35:37,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:35:37,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:35:37,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:35:37,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:35:37,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:35:37,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:35:37,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:35:37,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:35:37,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:35:37,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:35:37,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:35:37,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:35:37,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:35:37,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:35:37,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:35:37,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:35:37,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:35:37,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:35:37,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:35:37,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:35:37,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:35:37,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:35:37,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:35:37,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:35:37,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:35:37,277 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:35:37,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:35:37,278 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:35:37,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:35:37,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:35:37,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:35:37,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:35:37,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:35:37,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:35:37,281 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:35:37,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:35:37,282 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:35:37,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:35:37,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:35:37,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:35:37,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:35:37,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:35:37,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:35:37,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:35:37,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:35:37,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:35:37,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:35:37,287 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:35:37,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:35:37,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:35:37,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:35:37,288 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_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92be10af768295be2ee9c176bac2a7de85c1afeb202e4b441d20022190d8e93f [2021-11-09 10:35:37,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:35:37,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:35:37,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:35:37,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:35:37,624 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:35:37,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c [2021-11-09 10:35:37,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/data/3ea00eff4/39e0821b04774508bbbe226b0692c0c5/FLAG9965694df [2021-11-09 10:35:38,238 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:35:38,239 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c [2021-11-09 10:35:38,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/data/3ea00eff4/39e0821b04774508bbbe226b0692c0c5/FLAG9965694df [2021-11-09 10:35:38,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/data/3ea00eff4/39e0821b04774508bbbe226b0692c0c5 [2021-11-09 10:35:38,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:35:38,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:35:38,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:35:38,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:35:38,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:35:38,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:35:38" (1/1) ... [2021-11-09 10:35:38,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bd478a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:38, skipping insertion in model container [2021-11-09 10:35:38,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:35:38" (1/1) ... [2021-11-09 10:35:38,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:35:38,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:35:38,936 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_8c2ea466-6f66-430f-83d4-3a6ca8689161/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c[6043,6056] [2021-11-09 10:35:38,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:35:38,950 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:35:39,002 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_8c2ea466-6f66-430f-83d4-3a6ca8689161/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.UNBOUNDED.pals.c[6043,6056] [2021-11-09 10:35:39,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:35:39,035 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:35:39,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39 WrapperNode [2021-11-09 10:35:39,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:35:39,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:35:39,037 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:35:39,037 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:35:39,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:35:39,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:35:39,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:35:39,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:35:39,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:35:39,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:35:39,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:35:39,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:35:39,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (1/1) ... [2021-11-09 10:35:39,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:35:39,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:39,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:35:39,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:35:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:35:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:35:39,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:35:39,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:35:39,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:35:39,927 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-11-09 10:35:39,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:35:39 BoogieIcfgContainer [2021-11-09 10:35:39,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:35:39,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:35:39,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:35:39,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:35:39,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:35:38" (1/3) ... [2021-11-09 10:35:39,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575119f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:35:39, skipping insertion in model container [2021-11-09 10:35:39,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:35:39" (2/3) ... [2021-11-09 10:35:39,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575119f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:35:39, skipping insertion in model container [2021-11-09 10:35:39,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:35:39" (3/3) ... [2021-11-09 10:35:39,949 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals.c [2021-11-09 10:35:39,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:35:39,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:35:40,022 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:35:40,029 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 [2021-11-09 10:35:40,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:35:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 62 states have internal predecessors, (103), 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) [2021-11-09 10:35:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 10:35:40,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:40,054 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] [2021-11-09 10:35:40,054 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:40,061 INFO L85 PathProgramCache]: Analyzing trace with hash -980022832, now seen corresponding path program 1 times [2021-11-09 10:35:40,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:40,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783181059] [2021-11-09 10:35:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:40,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:40,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:40,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783181059] [2021-11-09 10:35:40,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783181059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:40,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:40,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:35:40,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769289650] [2021-11-09 10:35:40,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:35:40,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:35:40,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:35:40,348 INFO L87 Difference]: Start difference. First operand has 63 states, 61 states have (on average 1.6885245901639345) internal successors, (103), 62 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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) [2021-11-09 10:35:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:40,372 INFO L93 Difference]: Finished difference Result 101 states and 165 transitions. [2021-11-09 10:35:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:35:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 10:35:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:40,385 INFO L225 Difference]: With dead ends: 101 [2021-11-09 10:35:40,385 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 10:35:40,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:35:40,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 10:35:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-09 10:35:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.6551724137931034) internal successors, (96), 58 states have internal predecessors, (96), 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) [2021-11-09 10:35:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 96 transitions. [2021-11-09 10:35:40,427 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 96 transitions. Word has length 25 [2021-11-09 10:35:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:40,427 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 96 transitions. [2021-11-09 10:35:40,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 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) [2021-11-09 10:35:40,428 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 96 transitions. [2021-11-09 10:35:40,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 10:35:40,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:40,430 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] [2021-11-09 10:35:40,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:35:40,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1797671282, now seen corresponding path program 1 times [2021-11-09 10:35:40,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:40,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616280682] [2021-11-09 10:35:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:40,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:40,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:40,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616280682] [2021-11-09 10:35:40,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616280682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:40,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:40,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:35:40,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654509865] [2021-11-09 10:35:40,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:35:40,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:35:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:40,601 INFO L87 Difference]: Start difference. First operand 59 states and 96 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-09 10:35:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:40,686 INFO L93 Difference]: Finished difference Result 100 states and 158 transitions. [2021-11-09 10:35:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:35:40,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 10:35:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:40,689 INFO L225 Difference]: With dead ends: 100 [2021-11-09 10:35:40,689 INFO L226 Difference]: Without dead ends: 59 [2021-11-09 10:35:40,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:35:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-09 10:35:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-09 10:35:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 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) [2021-11-09 10:35:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2021-11-09 10:35:40,703 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 25 [2021-11-09 10:35:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:40,704 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2021-11-09 10:35:40,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-11-09 10:35:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2021-11-09 10:35:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:35:40,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:40,709 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] [2021-11-09 10:35:40,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:35:40,710 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:40,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:40,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1903157419, now seen corresponding path program 1 times [2021-11-09 10:35:40,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:40,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908202234] [2021-11-09 10:35:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:40,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:40,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:40,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908202234] [2021-11-09 10:35:40,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908202234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:40,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:40,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:35:40,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045304869] [2021-11-09 10:35:40,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:35:40,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:40,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:35:40,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:35:40,859 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:40,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:40,886 INFO L93 Difference]: Finished difference Result 127 states and 186 transitions. [2021-11-09 10:35:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:35:40,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:35:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:40,889 INFO L225 Difference]: With dead ends: 127 [2021-11-09 10:35:40,889 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 10:35:40,890 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 [2021-11-09 10:35:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 10:35:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-11-09 10:35:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.4482758620689655) internal successors, (126), 87 states have internal predecessors, (126), 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) [2021-11-09 10:35:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2021-11-09 10:35:40,904 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 40 [2021-11-09 10:35:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:40,904 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2021-11-09 10:35:40,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2021-11-09 10:35:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:35:40,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:40,907 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] [2021-11-09 10:35:40,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:35:40,907 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:40,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2054016735, now seen corresponding path program 1 times [2021-11-09 10:35:40,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:40,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097868623] [2021-11-09 10:35:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:40,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:41,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:41,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097868623] [2021-11-09 10:35:41,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097868623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:41,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:41,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:35:41,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101084688] [2021-11-09 10:35:41,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:35:41,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:41,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:35:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:35:41,061 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:41,121 INFO L93 Difference]: Finished difference Result 208 states and 314 transitions. [2021-11-09 10:35:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:35:41,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:35:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:41,130 INFO L225 Difference]: With dead ends: 208 [2021-11-09 10:35:41,130 INFO L226 Difference]: Without dead ends: 142 [2021-11-09 10:35:41,131 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 [2021-11-09 10:35:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-09 10:35:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-11-09 10:35:41,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.4892086330935252) internal successors, (207), 139 states have internal predecessors, (207), 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) [2021-11-09 10:35:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 207 transitions. [2021-11-09 10:35:41,168 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 207 transitions. Word has length 40 [2021-11-09 10:35:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:41,169 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 207 transitions. [2021-11-09 10:35:41,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:41,169 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 207 transitions. [2021-11-09 10:35:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 10:35:41,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:41,180 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] [2021-11-09 10:35:41,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:35:41,181 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:41,182 INFO L85 PathProgramCache]: Analyzing trace with hash -836031337, now seen corresponding path program 1 times [2021-11-09 10:35:41,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:41,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809874325] [2021-11-09 10:35:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:41,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:41,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:41,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809874325] [2021-11-09 10:35:41,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809874325] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:41,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:41,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:35:41,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905697129] [2021-11-09 10:35:41,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:35:41,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:35:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:41,386 INFO L87 Difference]: Start difference. First operand 140 states and 207 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:41,583 INFO L93 Difference]: Finished difference Result 848 states and 1317 transitions. [2021-11-09 10:35:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:35:41,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 10:35:41,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:41,591 INFO L225 Difference]: With dead ends: 848 [2021-11-09 10:35:41,591 INFO L226 Difference]: Without dead ends: 730 [2021-11-09 10:35:41,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:35:41,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-09 10:35:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 256. [2021-11-09 10:35:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.5019607843137255) internal successors, (383), 255 states have internal predecessors, (383), 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) [2021-11-09 10:35:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 383 transitions. [2021-11-09 10:35:41,649 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 383 transitions. Word has length 40 [2021-11-09 10:35:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:41,652 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 383 transitions. [2021-11-09 10:35:41,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 383 transitions. [2021-11-09 10:35:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 10:35:41,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:41,657 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] [2021-11-09 10:35:41,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:35:41,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:41,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1682931033, now seen corresponding path program 1 times [2021-11-09 10:35:41,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:41,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236830296] [2021-11-09 10:35:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:41,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:41,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:41,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236830296] [2021-11-09 10:35:41,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236830296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:41,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:41,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:35:41,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081870854] [2021-11-09 10:35:41,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:35:41,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:41,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:35:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:35:41,739 INFO L87 Difference]: Start difference. First operand 256 states and 383 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:41,795 INFO L93 Difference]: Finished difference Result 680 states and 1029 transitions. [2021-11-09 10:35:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:35:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 10:35:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:41,800 INFO L225 Difference]: With dead ends: 680 [2021-11-09 10:35:41,800 INFO L226 Difference]: Without dead ends: 446 [2021-11-09 10:35:41,801 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 [2021-11-09 10:35:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-09 10:35:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2021-11-09 10:35:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.4689655172413794) internal successors, (639), 435 states have internal predecessors, (639), 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) [2021-11-09 10:35:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 639 transitions. [2021-11-09 10:35:41,845 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 639 transitions. Word has length 42 [2021-11-09 10:35:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:41,845 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 639 transitions. [2021-11-09 10:35:41,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 639 transitions. [2021-11-09 10:35:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 10:35:41,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:41,848 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] [2021-11-09 10:35:41,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:35:41,848 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1616437521, now seen corresponding path program 1 times [2021-11-09 10:35:41,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:41,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369196906] [2021-11-09 10:35:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:41,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:42,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:42,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369196906] [2021-11-09 10:35:42,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369196906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:42,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:42,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:35:42,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713017303] [2021-11-09 10:35:42,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:35:42,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:35:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:42,105 INFO L87 Difference]: Start difference. First operand 436 states and 639 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:42,232 INFO L93 Difference]: Finished difference Result 852 states and 1257 transitions. [2021-11-09 10:35:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:35:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 10:35:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:42,237 INFO L225 Difference]: With dead ends: 852 [2021-11-09 10:35:42,237 INFO L226 Difference]: Without dead ends: 438 [2021-11-09 10:35:42,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:35:42,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-09 10:35:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2021-11-09 10:35:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.450574712643678) internal successors, (631), 435 states have internal predecessors, (631), 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) [2021-11-09 10:35:42,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 631 transitions. [2021-11-09 10:35:42,281 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 631 transitions. Word has length 42 [2021-11-09 10:35:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:42,283 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 631 transitions. [2021-11-09 10:35:42,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 631 transitions. [2021-11-09 10:35:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 10:35:42,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:42,290 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] [2021-11-09 10:35:42,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:35:42,291 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1015321205, now seen corresponding path program 1 times [2021-11-09 10:35:42,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:42,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410262944] [2021-11-09 10:35:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:42,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:42,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:42,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410262944] [2021-11-09 10:35:42,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410262944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:42,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:42,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:35:42,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615123668] [2021-11-09 10:35:42,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:35:42,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:35:42,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:35:42,422 INFO L87 Difference]: Start difference. First operand 436 states and 631 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2021-11-09 10:35:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:42,628 INFO L93 Difference]: Finished difference Result 762 states and 1095 transitions. [2021-11-09 10:35:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:35:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 10:35:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:42,635 INFO L225 Difference]: With dead ends: 762 [2021-11-09 10:35:42,636 INFO L226 Difference]: Without dead ends: 760 [2021-11-09 10:35:42,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:35:42,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-11-09 10:35:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 460. [2021-11-09 10:35:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.4183006535947713) internal successors, (651), 459 states have internal predecessors, (651), 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) [2021-11-09 10:35:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 651 transitions. [2021-11-09 10:35:42,683 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 651 transitions. Word has length 43 [2021-11-09 10:35:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:42,683 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 651 transitions. [2021-11-09 10:35:42,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) [2021-11-09 10:35:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 651 transitions. [2021-11-09 10:35:42,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 10:35:42,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:42,686 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] [2021-11-09 10:35:42,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:35:42,687 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1022832678, now seen corresponding path program 1 times [2021-11-09 10:35:42,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:42,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790195311] [2021-11-09 10:35:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:42,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:42,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:42,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790195311] [2021-11-09 10:35:42,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790195311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:42,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:42,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:35:42,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723962935] [2021-11-09 10:35:42,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:35:42,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:42,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:35:42,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:35:42,754 INFO L87 Difference]: Start difference. First operand 460 states and 651 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-11-09 10:35:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:42,830 INFO L93 Difference]: Finished difference Result 915 states and 1313 transitions. [2021-11-09 10:35:42,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:35:42,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2021-11-09 10:35:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:42,838 INFO L225 Difference]: With dead ends: 915 [2021-11-09 10:35:42,839 INFO L226 Difference]: Without dead ends: 656 [2021-11-09 10:35:42,841 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 [2021-11-09 10:35:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-11-09 10:35:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 654. [2021-11-09 10:35:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 1.4104134762633997) internal successors, (921), 653 states have internal predecessors, (921), 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) [2021-11-09 10:35:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 921 transitions. [2021-11-09 10:35:42,905 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 921 transitions. Word has length 44 [2021-11-09 10:35:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:42,906 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 921 transitions. [2021-11-09 10:35:42,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-11-09 10:35:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 921 transitions. [2021-11-09 10:35:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:35:42,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:42,909 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:42,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:35:42,910 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1850444022, now seen corresponding path program 1 times [2021-11-09 10:35:42,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:42,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049157377] [2021-11-09 10:35:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:42,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 10:35:43,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:43,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049157377] [2021-11-09 10:35:43,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049157377] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:43,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:43,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:35:43,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810193729] [2021-11-09 10:35:43,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:35:43,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:35:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:43,049 INFO L87 Difference]: Start difference. First operand 654 states and 921 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-09 10:35:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:43,284 INFO L93 Difference]: Finished difference Result 2682 states and 3797 transitions. [2021-11-09 10:35:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:35:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 [2021-11-09 10:35:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:43,300 INFO L225 Difference]: With dead ends: 2682 [2021-11-09 10:35:43,300 INFO L226 Difference]: Without dead ends: 2052 [2021-11-09 10:35:43,302 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 [2021-11-09 10:35:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-11-09 10:35:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1282. [2021-11-09 10:35:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.409055425448868) internal successors, (1805), 1281 states have internal predecessors, (1805), 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) [2021-11-09 10:35:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1805 transitions. [2021-11-09 10:35:43,447 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1805 transitions. Word has length 62 [2021-11-09 10:35:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:43,448 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1805 transitions. [2021-11-09 10:35:43,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-09 10:35:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1805 transitions. [2021-11-09 10:35:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:35:43,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:43,450 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:43,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:35:43,451 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash 675740458, now seen corresponding path program 1 times [2021-11-09 10:35:43,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:43,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528195378] [2021-11-09 10:35:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:43,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 10:35:43,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:43,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528195378] [2021-11-09 10:35:43,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528195378] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:43,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:43,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:35:43,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948332500] [2021-11-09 10:35:43,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:35:43,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:35:43,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:43,551 INFO L87 Difference]: Start difference. First operand 1282 states and 1805 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:43,847 INFO L93 Difference]: Finished difference Result 3310 states and 4681 transitions. [2021-11-09 10:35:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:35:43,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-09 10:35:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:43,865 INFO L225 Difference]: With dead ends: 3310 [2021-11-09 10:35:43,865 INFO L226 Difference]: Without dead ends: 2680 [2021-11-09 10:35:43,867 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 [2021-11-09 10:35:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-11-09 10:35:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2226. [2021-11-09 10:35:44,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 1.402696629213483) internal successors, (3121), 2225 states have internal predecessors, (3121), 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) [2021-11-09 10:35:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3121 transitions. [2021-11-09 10:35:44,060 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3121 transitions. Word has length 62 [2021-11-09 10:35:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:44,061 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 3121 transitions. [2021-11-09 10:35:44,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:35:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3121 transitions. [2021-11-09 10:35:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:35:44,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:44,064 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:44,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:35:44,064 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1509451614, now seen corresponding path program 1 times [2021-11-09 10:35:44,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:44,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982552237] [2021-11-09 10:35:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:44,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:44,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:44,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982552237] [2021-11-09 10:35:44,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982552237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:44,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:44,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:35:44,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138724193] [2021-11-09 10:35:44,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:35:44,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:35:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:35:44,137 INFO L87 Difference]: Start difference. First operand 2226 states and 3121 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) [2021-11-09 10:35:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:44,310 INFO L93 Difference]: Finished difference Result 3819 states and 5388 transitions. [2021-11-09 10:35:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:35:44,311 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 [2021-11-09 10:35:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:44,326 INFO L225 Difference]: With dead ends: 3819 [2021-11-09 10:35:44,326 INFO L226 Difference]: Without dead ends: 1617 [2021-11-09 10:35:44,332 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 [2021-11-09 10:35:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-11-09 10:35:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1615. [2021-11-09 10:35:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 1.4008674101610905) internal successors, (2261), 1614 states have internal predecessors, (2261), 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) [2021-11-09 10:35:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2261 transitions. [2021-11-09 10:35:44,469 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2261 transitions. Word has length 64 [2021-11-09 10:35:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:44,471 INFO L470 AbstractCegarLoop]: Abstraction has 1615 states and 2261 transitions. [2021-11-09 10:35:44,471 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) [2021-11-09 10:35:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2261 transitions. [2021-11-09 10:35:44,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:35:44,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:44,473 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] [2021-11-09 10:35:44,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:35:44,474 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:44,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash -533719953, now seen corresponding path program 1 times [2021-11-09 10:35:44,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:44,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019594098] [2021-11-09 10:35:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:44,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:35:44,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:44,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019594098] [2021-11-09 10:35:44,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019594098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:35:44,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:35:44,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:35:44,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977829655] [2021-11-09 10:35:44,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:35:44,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:44,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:35:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:35:44,579 INFO L87 Difference]: Start difference. First operand 1615 states and 2261 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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) [2021-11-09 10:35:44,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:44,796 INFO L93 Difference]: Finished difference Result 2967 states and 4185 transitions. [2021-11-09 10:35:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:35:44,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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 64 [2021-11-09 10:35:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:44,813 INFO L225 Difference]: With dead ends: 2967 [2021-11-09 10:35:44,813 INFO L226 Difference]: Without dead ends: 2517 [2021-11-09 10:35:44,815 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 [2021-11-09 10:35:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-11-09 10:35:45,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 2063. [2021-11-09 10:35:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 1.4030067895247333) internal successors, (2893), 2062 states have internal predecessors, (2893), 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) [2021-11-09 10:35:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2893 transitions. [2021-11-09 10:35:45,034 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2893 transitions. Word has length 64 [2021-11-09 10:35:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:45,035 INFO L470 AbstractCegarLoop]: Abstraction has 2063 states and 2893 transitions. [2021-11-09 10:35:45,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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) [2021-11-09 10:35:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2893 transitions. [2021-11-09 10:35:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 10:35:45,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:45,041 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:45,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:35:45,042 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:45,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:45,043 INFO L85 PathProgramCache]: Analyzing trace with hash 453585990, now seen corresponding path program 1 times [2021-11-09 10:35:45,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:45,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278777409] [2021-11-09 10:35:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:45,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:45,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:45,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278777409] [2021-11-09 10:35:45,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278777409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:35:45,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085633468] [2021-11-09 10:35:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:45,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:45,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:45,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:35:45,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:35:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 10:35:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:35:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 10:35:46,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085633468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:35:46,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:35:46,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-11-09 10:35:46,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558164072] [2021-11-09 10:35:46,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:35:46,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:46,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:35:46,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:35:46,217 INFO L87 Difference]: Start difference. First operand 2063 states and 2893 transitions. Second operand has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 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) [2021-11-09 10:35:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:35:49,274 INFO L93 Difference]: Finished difference Result 11357 states and 15649 transitions. [2021-11-09 10:35:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 10:35:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 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 [2021-11-09 10:35:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:35:49,336 INFO L225 Difference]: With dead ends: 11357 [2021-11-09 10:35:49,336 INFO L226 Difference]: Without dead ends: 9339 [2021-11-09 10:35:49,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=460, Invalid=2090, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:35:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9339 states. [2021-11-09 10:35:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9339 to 6075. [2021-11-09 10:35:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6075 states, 6074 states have (on average 1.3450773789924266) internal successors, (8170), 6074 states have internal predecessors, (8170), 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) [2021-11-09 10:35:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 8170 transitions. [2021-11-09 10:35:50,088 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 8170 transitions. Word has length 65 [2021-11-09 10:35:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:35:50,089 INFO L470 AbstractCegarLoop]: Abstraction has 6075 states and 8170 transitions. [2021-11-09 10:35:50,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.785714285714286) internal successors, (123), 14 states have internal predecessors, (123), 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) [2021-11-09 10:35:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 8170 transitions. [2021-11-09 10:35:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 10:35:50,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:35:50,091 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:35:50,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:35:50,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 10:35:50,318 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:35:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:35:50,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1141993671, now seen corresponding path program 1 times [2021-11-09 10:35:50,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:35:50,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241840378] [2021-11-09 10:35:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:50,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:35:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:50,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:35:50,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241840378] [2021-11-09 10:35:50,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241840378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:35:50,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831717772] [2021-11-09 10:35:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:35:50,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:35:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:35:50,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:35:50,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:35:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:35:50,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:35:50,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:35:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:35:52,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831717772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:35:52,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:35:52,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-11-09 10:35:52,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067924518] [2021-11-09 10:35:52,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:35:52,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:35:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:35:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:35:52,308 INFO L87 Difference]: Start difference. First operand 6075 states and 8170 transitions. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2021-11-09 10:36:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:06,704 INFO L93 Difference]: Finished difference Result 38083 states and 50997 transitions. [2021-11-09 10:36:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-09 10:36:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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 66 [2021-11-09 10:36:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:06,829 INFO L225 Difference]: With dead ends: 38083 [2021-11-09 10:36:06,829 INFO L226 Difference]: Without dead ends: 32647 [2021-11-09 10:36:06,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6724 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2627, Invalid=15733, Unknown=0, NotChecked=0, Total=18360 [2021-11-09 10:36:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32647 states. [2021-11-09 10:36:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32647 to 13842. [2021-11-09 10:36:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13842 states, 13841 states have (on average 1.343616790694314) internal successors, (18597), 13841 states have internal predecessors, (18597), 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) [2021-11-09 10:36:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13842 states to 13842 states and 18597 transitions. [2021-11-09 10:36:08,650 INFO L78 Accepts]: Start accepts. Automaton has 13842 states and 18597 transitions. Word has length 66 [2021-11-09 10:36:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:08,651 INFO L470 AbstractCegarLoop]: Abstraction has 13842 states and 18597 transitions. [2021-11-09 10:36:08,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2021-11-09 10:36:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 13842 states and 18597 transitions. [2021-11-09 10:36:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 10:36:08,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:08,654 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] [2021-11-09 10:36:08,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:36:08,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 10:36:08,878 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:08,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1171004599, now seen corresponding path program 1 times [2021-11-09 10:36:08,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:08,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979720454] [2021-11-09 10:36:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:08,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 10:36:08,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:08,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979720454] [2021-11-09 10:36:08,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979720454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:08,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:08,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:36:08,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908419248] [2021-11-09 10:36:08,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:36:08,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:36:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:36:08,968 INFO L87 Difference]: Start difference. First operand 13842 states and 18597 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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) [2021-11-09 10:36:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:10,130 INFO L93 Difference]: Finished difference Result 24470 states and 33175 transitions. [2021-11-09 10:36:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:36:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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 66 [2021-11-09 10:36:10,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:10,158 INFO L225 Difference]: With dead ends: 24470 [2021-11-09 10:36:10,158 INFO L226 Difference]: Without dead ends: 10701 [2021-11-09 10:36:10,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:36:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10701 states. [2021-11-09 10:36:11,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10701 to 10701. [2021-11-09 10:36:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10701 states, 10700 states have (on average 1.3517757009345794) internal successors, (14464), 10700 states have internal predecessors, (14464), 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) [2021-11-09 10:36:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10701 states to 10701 states and 14464 transitions. [2021-11-09 10:36:11,173 INFO L78 Accepts]: Start accepts. Automaton has 10701 states and 14464 transitions. Word has length 66 [2021-11-09 10:36:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:11,174 INFO L470 AbstractCegarLoop]: Abstraction has 10701 states and 14464 transitions. [2021-11-09 10:36:11,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 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) [2021-11-09 10:36:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 10701 states and 14464 transitions. [2021-11-09 10:36:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:36:11,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:11,175 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:36:11,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:36:11,176 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:11,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash 325493921, now seen corresponding path program 1 times [2021-11-09 10:36:11,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:11,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446708524] [2021-11-09 10:36:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:11,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:11,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:11,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446708524] [2021-11-09 10:36:11,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446708524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:36:11,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568832310] [2021-11-09 10:36:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:11,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:36:11,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:36:11,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:36:11,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:36:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:11,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:36:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:36:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:13,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568832310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:36:13,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:36:13,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-09 10:36:13,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735211948] [2021-11-09 10:36:13,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:36:13,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:36:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:36:13,038 INFO L87 Difference]: Start difference. First operand 10701 states and 14464 transitions. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:36:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:19,477 INFO L93 Difference]: Finished difference Result 63280 states and 85445 transitions. [2021-11-09 10:36:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:36:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-09 10:36:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:19,615 INFO L225 Difference]: With dead ends: 63280 [2021-11-09 10:36:19,615 INFO L226 Difference]: Without dead ends: 53549 [2021-11-09 10:36:19,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=615, Invalid=1737, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:36:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53549 states. [2021-11-09 10:36:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53549 to 25232. [2021-11-09 10:36:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25232 states, 25231 states have (on average 1.3499663112837383) internal successors, (34061), 25231 states have internal predecessors, (34061), 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) [2021-11-09 10:36:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25232 states to 25232 states and 34061 transitions. [2021-11-09 10:36:22,800 INFO L78 Accepts]: Start accepts. Automaton has 25232 states and 34061 transitions. Word has length 67 [2021-11-09 10:36:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:22,800 INFO L470 AbstractCegarLoop]: Abstraction has 25232 states and 34061 transitions. [2021-11-09 10:36:22,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 16 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:36:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 25232 states and 34061 transitions. [2021-11-09 10:36:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:36:22,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:22,804 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] [2021-11-09 10:36:22,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:36:23,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:36:23,022 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:23,023 INFO L85 PathProgramCache]: Analyzing trace with hash 72303667, now seen corresponding path program 1 times [2021-11-09 10:36:23,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:23,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090585092] [2021-11-09 10:36:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:23,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:24,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:24,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090585092] [2021-11-09 10:36:24,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090585092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:36:24,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556315932] [2021-11-09 10:36:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:24,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:36:24,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:36:24,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:36:24,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:36:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:24,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 10:36:24,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:36:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:27,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556315932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:36:27,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:36:27,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-11-09 10:36:27,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283362065] [2021-11-09 10:36:27,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:36:27,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:27,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:36:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:36:27,533 INFO L87 Difference]: Start difference. First operand 25232 states and 34061 transitions. Second operand has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 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) [2021-11-09 10:36:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:50,670 INFO L93 Difference]: Finished difference Result 90483 states and 121797 transitions. [2021-11-09 10:36:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-09 10:36:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 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 67 [2021-11-09 10:36:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:50,828 INFO L225 Difference]: With dead ends: 90483 [2021-11-09 10:36:50,828 INFO L226 Difference]: Without dead ends: 77326 [2021-11-09 10:36:50,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1603, Invalid=10169, Unknown=0, NotChecked=0, Total=11772 [2021-11-09 10:36:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77326 states. [2021-11-09 10:36:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77326 to 41129. [2021-11-09 10:36:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41129 states, 41128 states have (on average 1.3455553394281268) internal successors, (55340), 41128 states have internal predecessors, (55340), 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) [2021-11-09 10:36:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41129 states to 41129 states and 55340 transitions. [2021-11-09 10:36:56,319 INFO L78 Accepts]: Start accepts. Automaton has 41129 states and 55340 transitions. Word has length 67 [2021-11-09 10:36:56,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:56,320 INFO L470 AbstractCegarLoop]: Abstraction has 41129 states and 55340 transitions. [2021-11-09 10:36:56,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8181818181818183) internal successors, (126), 33 states have internal predecessors, (126), 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) [2021-11-09 10:36:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 41129 states and 55340 transitions. [2021-11-09 10:36:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:36:56,323 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:56,323 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:36:56,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-09 10:36:56,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 10:36:56,538 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:56,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2019413495, now seen corresponding path program 1 times [2021-11-09 10:36:56,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:56,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806940076] [2021-11-09 10:36:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:56,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:56,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:56,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806940076] [2021-11-09 10:36:56,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806940076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:56,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:56,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:36:56,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201427449] [2021-11-09 10:36:56,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:36:56,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:36:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:36:56,604 INFO L87 Difference]: Start difference. First operand 41129 states and 55340 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-09 10:36:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:59,895 INFO L93 Difference]: Finished difference Result 63065 states and 85069 transitions. [2021-11-09 10:36:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:36:59,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-09 10:36:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:59,932 INFO L225 Difference]: With dead ends: 63065 [2021-11-09 10:36:59,933 INFO L226 Difference]: Without dead ends: 24313 [2021-11-09 10:36:59,971 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 [2021-11-09 10:36:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24313 states. [2021-11-09 10:37:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24313 to 24311. [2021-11-09 10:37:03,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24311 states, 24310 states have (on average 1.309214315096668) internal successors, (31827), 24310 states have internal predecessors, (31827), 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) [2021-11-09 10:37:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24311 states to 24311 states and 31827 transitions. [2021-11-09 10:37:03,227 INFO L78 Accepts]: Start accepts. Automaton has 24311 states and 31827 transitions. Word has length 67 [2021-11-09 10:37:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:03,228 INFO L470 AbstractCegarLoop]: Abstraction has 24311 states and 31827 transitions. [2021-11-09 10:37:03,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-09 10:37:03,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24311 states and 31827 transitions. [2021-11-09 10:37:03,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:37:03,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:03,230 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:37:03,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-09 10:37:03,230 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:03,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:03,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1578662397, now seen corresponding path program 1 times [2021-11-09 10:37:03,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:03,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65256662] [2021-11-09 10:37:03,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:03,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-09 10:37:03,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:03,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65256662] [2021-11-09 10:37:03,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65256662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:37:03,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:37:03,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:37:03,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384446485] [2021-11-09 10:37:03,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:37:03,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:37:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:37:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:37:03,301 INFO L87 Difference]: Start difference. First operand 24311 states and 31827 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 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) [2021-11-09 10:37:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:37:05,624 INFO L93 Difference]: Finished difference Result 39297 states and 51548 transitions. [2021-11-09 10:37:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:37:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 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 67 [2021-11-09 10:37:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:05,646 INFO L225 Difference]: With dead ends: 39297 [2021-11-09 10:37:05,646 INFO L226 Difference]: Without dead ends: 15085 [2021-11-09 10:37:05,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:37:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15085 states. [2021-11-09 10:37:07,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15085 to 15085. [2021-11-09 10:37:08,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15085 states, 15084 states have (on average 1.2999867409175285) internal successors, (19609), 15084 states have internal predecessors, (19609), 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) [2021-11-09 10:37:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15085 states to 15085 states and 19609 transitions. [2021-11-09 10:37:08,022 INFO L78 Accepts]: Start accepts. Automaton has 15085 states and 19609 transitions. Word has length 67 [2021-11-09 10:37:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:08,023 INFO L470 AbstractCegarLoop]: Abstraction has 15085 states and 19609 transitions. [2021-11-09 10:37:08,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 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) [2021-11-09 10:37:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 15085 states and 19609 transitions. [2021-11-09 10:37:08,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:37:08,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:08,024 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:37:08,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 10:37:08,025 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:08,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1933567940, now seen corresponding path program 1 times [2021-11-09 10:37:08,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:08,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898061825] [2021-11-09 10:37:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:08,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 10:37:08,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:08,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898061825] [2021-11-09 10:37:08,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898061825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:37:08,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:37:08,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:37:08,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584442676] [2021-11-09 10:37:08,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:37:08,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:37:08,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:37:08,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:37:08,098 INFO L87 Difference]: Start difference. First operand 15085 states and 19609 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 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) [2021-11-09 10:37:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:37:10,422 INFO L93 Difference]: Finished difference Result 27846 states and 36233 transitions. [2021-11-09 10:37:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:37:10,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 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 68 [2021-11-09 10:37:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:10,442 INFO L225 Difference]: With dead ends: 27846 [2021-11-09 10:37:10,442 INFO L226 Difference]: Without dead ends: 12840 [2021-11-09 10:37:10,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:37:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12840 states. [2021-11-09 10:37:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12840 to 12840. [2021-11-09 10:37:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12840 states, 12839 states have (on average 1.2846016044863307) internal successors, (16493), 12839 states have internal predecessors, (16493), 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) [2021-11-09 10:37:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12840 states to 12840 states and 16493 transitions. [2021-11-09 10:37:12,545 INFO L78 Accepts]: Start accepts. Automaton has 12840 states and 16493 transitions. Word has length 68 [2021-11-09 10:37:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:12,546 INFO L470 AbstractCegarLoop]: Abstraction has 12840 states and 16493 transitions. [2021-11-09 10:37:12,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 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) [2021-11-09 10:37:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 12840 states and 16493 transitions. [2021-11-09 10:37:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 10:37:12,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:12,548 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:37:12,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 10:37:12,549 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1605928119, now seen corresponding path program 1 times [2021-11-09 10:37:12,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:12,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535618318] [2021-11-09 10:37:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:12,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:37:14,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:14,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535618318] [2021-11-09 10:37:14,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535618318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:37:14,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759000370] [2021-11-09 10:37:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:14,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:37:14,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:37:14,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:37:14,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:37:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:37:14,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:37:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:37:18,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759000370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:37:18,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:37:18,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 32 [2021-11-09 10:37:18,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780026632] [2021-11-09 10:37:18,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 10:37:18,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:37:18,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 10:37:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-11-09 10:37:18,155 INFO L87 Difference]: Start difference. First operand 12840 states and 16493 transitions. Second operand has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 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) [2021-11-09 10:37:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:37:39,447 INFO L93 Difference]: Finished difference Result 45245 states and 57885 transitions. [2021-11-09 10:37:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-09 10:37:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 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 69 [2021-11-09 10:37:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:39,512 INFO L225 Difference]: With dead ends: 45245 [2021-11-09 10:37:39,513 INFO L226 Difference]: Without dead ends: 39256 [2021-11-09 10:37:39,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4734 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=2220, Invalid=13032, Unknown=0, NotChecked=0, Total=15252 [2021-11-09 10:37:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39256 states. [2021-11-09 10:37:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39256 to 12727. [2021-11-09 10:37:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12727 states, 12726 states have (on average 1.2848499135627849) internal successors, (16351), 12726 states have internal predecessors, (16351), 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) [2021-11-09 10:37:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12727 states to 12727 states and 16351 transitions. [2021-11-09 10:37:41,628 INFO L78 Accepts]: Start accepts. Automaton has 12727 states and 16351 transitions. Word has length 69 [2021-11-09 10:37:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:41,628 INFO L470 AbstractCegarLoop]: Abstraction has 12727 states and 16351 transitions. [2021-11-09 10:37:41,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 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) [2021-11-09 10:37:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 12727 states and 16351 transitions. [2021-11-09 10:37:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-09 10:37:41,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:41,631 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:37:41,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:37:41,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 10:37:41,832 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2125531955, now seen corresponding path program 1 times [2021-11-09 10:37:41,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:41,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075167015] [2021-11-09 10:37:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:41,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:37:41,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:41,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075167015] [2021-11-09 10:37:41,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075167015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:37:41,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651033638] [2021-11-09 10:37:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:41,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:37:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:37:41,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:37:41,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:37:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:42,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:37:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:37:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:37:43,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651033638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:37:43,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:37:43,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 10:37:43,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268568499] [2021-11-09 10:37:43,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:37:43,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:37:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:37:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:37:43,328 INFO L87 Difference]: Start difference. First operand 12727 states and 16351 transitions. Second operand has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 10 states have internal predecessors, (156), 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) [2021-11-09 10:37:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:37:45,255 INFO L93 Difference]: Finished difference Result 20799 states and 26742 transitions. [2021-11-09 10:37:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:37:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 10 states have internal predecessors, (156), 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 88 [2021-11-09 10:37:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:45,271 INFO L225 Difference]: With dead ends: 20799 [2021-11-09 10:37:45,271 INFO L226 Difference]: Without dead ends: 11695 [2021-11-09 10:37:45,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:37:45,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11695 states. [2021-11-09 10:37:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11695 to 10591. [2021-11-09 10:37:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10591 states, 10590 states have (on average 1.270349386213409) internal successors, (13453), 10590 states have internal predecessors, (13453), 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) [2021-11-09 10:37:46,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10591 states to 10591 states and 13453 transitions. [2021-11-09 10:37:46,836 INFO L78 Accepts]: Start accepts. Automaton has 10591 states and 13453 transitions. Word has length 88 [2021-11-09 10:37:46,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:46,837 INFO L470 AbstractCegarLoop]: Abstraction has 10591 states and 13453 transitions. [2021-11-09 10:37:46,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.181818181818182) internal successors, (156), 10 states have internal predecessors, (156), 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) [2021-11-09 10:37:46,837 INFO L276 IsEmpty]: Start isEmpty. Operand 10591 states and 13453 transitions. [2021-11-09 10:37:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-09 10:37:46,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:46,843 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:37:46,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:37:47,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 10:37:47,058 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:47,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:47,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2126200137, now seen corresponding path program 1 times [2021-11-09 10:37:47,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:47,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204932077] [2021-11-09 10:37:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:47,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:47,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 75 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 10:37:47,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:47,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204932077] [2021-11-09 10:37:47,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204932077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:37:47,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097668091] [2021-11-09 10:37:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:47,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:37:47,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:37:47,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:37:47,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:37:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:48,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:37:48,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:37:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 10:37:48,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097668091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:37:48,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:37:48,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-09 10:37:48,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292701191] [2021-11-09 10:37:48,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:37:48,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:37:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:37:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:37:48,745 INFO L87 Difference]: Start difference. First operand 10591 states and 13453 transitions. Second operand has 10 states, 10 states have (on average 19.1) internal successors, (191), 10 states have internal predecessors, (191), 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) [2021-11-09 10:37:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:37:50,251 INFO L93 Difference]: Finished difference Result 19247 states and 24516 transitions. [2021-11-09 10:37:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:37:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 19.1) internal successors, (191), 10 states have internal predecessors, (191), 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 110 [2021-11-09 10:37:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:50,262 INFO L225 Difference]: With dead ends: 19247 [2021-11-09 10:37:50,262 INFO L226 Difference]: Without dead ends: 9137 [2021-11-09 10:37:50,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:37:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9137 states. [2021-11-09 10:37:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9137 to 6917. [2021-11-09 10:37:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 1.25) internal successors, (8645), 6916 states have internal predecessors, (8645), 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) [2021-11-09 10:37:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 8645 transitions. [2021-11-09 10:37:51,347 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 8645 transitions. Word has length 110 [2021-11-09 10:37:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:51,348 INFO L470 AbstractCegarLoop]: Abstraction has 6917 states and 8645 transitions. [2021-11-09 10:37:51,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.1) internal successors, (191), 10 states have internal predecessors, (191), 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) [2021-11-09 10:37:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 8645 transitions. [2021-11-09 10:37:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-09 10:37:51,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:51,352 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:37:51,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:37:51,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 10:37:51,582 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1960527463, now seen corresponding path program 1 times [2021-11-09 10:37:51,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:51,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125422683] [2021-11-09 10:37:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:51,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 10:37:51,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:51,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125422683] [2021-11-09 10:37:51,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125422683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:37:51,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:37:51,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:37:51,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860247072] [2021-11-09 10:37:51,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:37:51,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:37:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:37:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:37:51,636 INFO L87 Difference]: Start difference. First operand 6917 states and 8645 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-11-09 10:37:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:37:52,264 INFO L93 Difference]: Finished difference Result 10383 states and 13097 transitions. [2021-11-09 10:37:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:37:52,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 110 [2021-11-09 10:37:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:37:52,268 INFO L225 Difference]: With dead ends: 10383 [2021-11-09 10:37:52,269 INFO L226 Difference]: Without dead ends: 3755 [2021-11-09 10:37:52,272 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 [2021-11-09 10:37:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2021-11-09 10:37:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3753. [2021-11-09 10:37:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 1.2446695095948828) internal successors, (4670), 3752 states have internal predecessors, (4670), 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) [2021-11-09 10:37:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 4670 transitions. [2021-11-09 10:37:52,810 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 4670 transitions. Word has length 110 [2021-11-09 10:37:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:37:52,811 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 4670 transitions. [2021-11-09 10:37:52,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-11-09 10:37:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 4670 transitions. [2021-11-09 10:37:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-09 10:37:52,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:37:52,814 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:37:52,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 10:37:52,815 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:37:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:37:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1445084205, now seen corresponding path program 1 times [2021-11-09 10:37:52,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:37:52,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900152846] [2021-11-09 10:37:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:52,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:37:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:37:53,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:37:53,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900152846] [2021-11-09 10:37:53,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900152846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:37:53,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578428029] [2021-11-09 10:37:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:37:53,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:37:53,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:37:53,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:37:53,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c2ea466-6f66-430f-83d4-3a6ca8689161/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:37:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:37:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 10:37:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:38:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:38:21,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578428029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:38:21,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:38:21,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-09 10:38:21,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765737280] [2021-11-09 10:38:21,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:38:21,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:38:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:38:21,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=311, Unknown=12, NotChecked=0, Total=380 [2021-11-09 10:38:21,156 INFO L87 Difference]: Start difference. First operand 3753 states and 4670 transitions. Second operand has 20 states, 20 states have (on average 9.5) internal successors, (190), 19 states have internal predecessors, (190), 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)