./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c5be25d34b5f565c0e61b447a9da3cd9d228084b5ddd898e062981f46972caa8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:14:51,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:14:51,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:14:51,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:14:51,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:14:51,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:14:51,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:14:51,905 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:14:51,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:14:51,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:14:51,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:14:51,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:14:51,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:14:51,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:14:51,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:14:51,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:14:51,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:14:51,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:14:51,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:14:51,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:14:51,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:14:51,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:14:51,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:14:51,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:14:51,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:14:51,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:14:51,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:14:51,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:14:51,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:14:51,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:14:51,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:14:51,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:14:51,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:14:51,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:14:51,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:14:51,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:14:51,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:14:51,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:14:51,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:14:51,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:14:51,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:14:51,985 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:14:52,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:14:52,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:14:52,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:14:52,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:14:52,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:14:52,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:14:52,020 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:14:52,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:14:52,021 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:14:52,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:14:52,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:14:52,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:14:52,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:14:52,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:14:52,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:14:52,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:14:52,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:14:52,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:14:52,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:14:52,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:14:52,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:14:52,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:14:52,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:14:52,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:14:52,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:14:52,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:14:52,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:14:52,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:14:52,027 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:14:52,027 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:14:52,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:14:52,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:14:52,028 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_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5be25d34b5f565c0e61b447a9da3cd9d228084b5ddd898e062981f46972caa8 [2021-11-07 08:14:52,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:14:52,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:14:52,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:14:52,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:14:52,380 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:14:52,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-11-07 08:14:52,478 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/data/12c0e3bf5/ec4158867cc744f69861b6a21b68a4eb/FLAG0eb2f77a4 [2021-11-07 08:14:53,277 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:14:53,278 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-11-07 08:14:53,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/data/12c0e3bf5/ec4158867cc744f69861b6a21b68a4eb/FLAG0eb2f77a4 [2021-11-07 08:14:53,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/data/12c0e3bf5/ec4158867cc744f69861b6a21b68a4eb [2021-11-07 08:14:53,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:14:53,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:14:53,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:14:53,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:14:53,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:14:53,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:14:53" (1/1) ... [2021-11-07 08:14:53,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd1357c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:53, skipping insertion in model container [2021-11-07 08:14:53,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:14:53" (1/1) ... [2021-11-07 08:14:53,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:14:53,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:14:53,954 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_658f56c9-43b7-48c7-919a-bdef653641bd/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c[9280,9293] [2021-11-07 08:14:53,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:14:53,972 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:14:54,075 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_658f56c9-43b7-48c7-919a-bdef653641bd/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c[9280,9293] [2021-11-07 08:14:54,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:14:54,096 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:14:54,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54 WrapperNode [2021-11-07 08:14:54,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:14:54,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:14:54,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:14:54,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:14:54,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:14:54,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:14:54,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:14:54,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:14:54,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:14:54,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:14:54,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:14:54,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:14:54,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (1/1) ... [2021-11-07 08:14:54,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:14:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:54,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:14:54,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:14:54,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:14:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:14:54,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:14:54,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:14:55,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:14:55,224 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-11-07 08:14:55,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:14:55 BoogieIcfgContainer [2021-11-07 08:14:55,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:14:55,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:14:55,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:14:55,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:14:55,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:14:53" (1/3) ... [2021-11-07 08:14:55,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126dbd88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:14:55, skipping insertion in model container [2021-11-07 08:14:55,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:14:54" (2/3) ... [2021-11-07 08:14:55,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126dbd88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:14:55, skipping insertion in model container [2021-11-07 08:14:55,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:14:55" (3/3) ... [2021-11-07 08:14:55,245 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c [2021-11-07 08:14:55,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:14:55,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:14:55,338 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:14:55,350 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:14:55,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:14:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 95 states have (on average 1.694736842105263) internal successors, (161), 96 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:14:55,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:55,408 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] [2021-11-07 08:14:55,409 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1799424214, now seen corresponding path program 1 times [2021-11-07 08:14:55,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:55,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255041428] [2021-11-07 08:14:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:55,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:55,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:55,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255041428] [2021-11-07 08:14:55,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255041428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:55,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:55,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 08:14:55,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381719372] [2021-11-07 08:14:55,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:14:55,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:55,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:14:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:14:55,846 INFO L87 Difference]: Start difference. First operand has 97 states, 95 states have (on average 1.694736842105263) internal successors, (161), 96 states have internal predecessors, (161), 0 states have call successors, (0), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:55,902 INFO L93 Difference]: Finished difference Result 165 states and 268 transitions. [2021-11-07 08:14:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:14:55,904 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-11-07 08:14:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:55,920 INFO L225 Difference]: With dead ends: 165 [2021-11-07 08:14:55,920 INFO L226 Difference]: Without dead ends: 93 [2021-11-07 08:14:55,925 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 [2021-11-07 08:14:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-07 08:14:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-07 08:14:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.673913043478261) internal successors, (154), 92 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 154 transitions. [2021-11-07 08:14:56,024 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 154 transitions. Word has length 29 [2021-11-07 08:14:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:56,026 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 154 transitions. [2021-11-07 08:14:56,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 154 transitions. [2021-11-07 08:14:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:14:56,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:56,033 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] [2021-11-07 08:14:56,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:14:56,034 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:56,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1665410708, now seen corresponding path program 1 times [2021-11-07 08:14:56,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:56,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559007270] [2021-11-07 08:14:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:56,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:56,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:56,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559007270] [2021-11-07 08:14:56,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559007270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:56,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:56,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:14:56,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359793361] [2021-11-07 08:14:56,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:14:56,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:14:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:14:56,270 INFO L87 Difference]: Start difference. First operand 93 states and 154 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:56,459 INFO L93 Difference]: Finished difference Result 223 states and 358 transitions. [2021-11-07 08:14:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:14:56,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-11-07 08:14:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:56,466 INFO L225 Difference]: With dead ends: 223 [2021-11-07 08:14:56,469 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 08:14:56,471 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 [2021-11-07 08:14:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 08:14:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 93. [2021-11-07 08:14:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4130434782608696) internal successors, (130), 92 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 130 transitions. [2021-11-07 08:14:56,490 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 130 transitions. Word has length 29 [2021-11-07 08:14:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:56,491 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 130 transitions. [2021-11-07 08:14:56,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 130 transitions. [2021-11-07 08:14:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:14:56,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:56,505 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:56,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:14:56,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:56,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1640520051, now seen corresponding path program 1 times [2021-11-07 08:14:56,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:56,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554139784] [2021-11-07 08:14:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:56,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:56,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:56,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554139784] [2021-11-07 08:14:56,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554139784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:56,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:56,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:56,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847091591] [2021-11-07 08:14:56,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:56,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:56,637 INFO L87 Difference]: Start difference. First operand 93 states and 130 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:56,673 INFO L93 Difference]: Finished difference Result 207 states and 310 transitions. [2021-11-07 08:14:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 08:14:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:56,680 INFO L225 Difference]: With dead ends: 207 [2021-11-07 08:14:56,681 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 08:14:56,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 08:14:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-11-07 08:14:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.475177304964539) internal successors, (208), 141 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 208 transitions. [2021-11-07 08:14:56,702 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 208 transitions. Word has length 52 [2021-11-07 08:14:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:56,702 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 208 transitions. [2021-11-07 08:14:56,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 208 transitions. [2021-11-07 08:14:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:14:56,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:56,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:56,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:14:56,705 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash -609394571, now seen corresponding path program 1 times [2021-11-07 08:14:56,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:56,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088741476] [2021-11-07 08:14:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:56,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:56,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:56,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088741476] [2021-11-07 08:14:56,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088741476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:56,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:56,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:56,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031902925] [2021-11-07 08:14:56,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:56,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:56,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:56,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:56,869 INFO L87 Difference]: Start difference. First operand 142 states and 208 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:56,913 INFO L93 Difference]: Finished difference Result 342 states and 524 transitions. [2021-11-07 08:14:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:56,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 08:14:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:56,918 INFO L225 Difference]: With dead ends: 342 [2021-11-07 08:14:56,919 INFO L226 Difference]: Without dead ends: 230 [2021-11-07 08:14:56,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-07 08:14:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2021-11-07 08:14:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 227 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 343 transitions. [2021-11-07 08:14:56,963 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 343 transitions. Word has length 53 [2021-11-07 08:14:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:56,964 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 343 transitions. [2021-11-07 08:14:56,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 343 transitions. [2021-11-07 08:14:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:14:56,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:56,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:56,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:14:56,967 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:56,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1908001763, now seen corresponding path program 1 times [2021-11-07 08:14:56,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:56,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150883972] [2021-11-07 08:14:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:56,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:57,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:57,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150883972] [2021-11-07 08:14:57,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150883972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:57,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:57,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:57,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700727601] [2021-11-07 08:14:57,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:57,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:57,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:57,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:57,047 INFO L87 Difference]: Start difference. First operand 228 states and 343 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:57,082 INFO L93 Difference]: Finished difference Result 576 states and 889 transitions. [2021-11-07 08:14:57,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:57,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 08:14:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:57,092 INFO L225 Difference]: With dead ends: 576 [2021-11-07 08:14:57,093 INFO L226 Difference]: Without dead ends: 378 [2021-11-07 08:14:57,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-07 08:14:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2021-11-07 08:14:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.5226666666666666) internal successors, (571), 375 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 571 transitions. [2021-11-07 08:14:57,133 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 571 transitions. Word has length 54 [2021-11-07 08:14:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:57,134 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 571 transitions. [2021-11-07 08:14:57,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 571 transitions. [2021-11-07 08:14:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:14:57,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:57,136 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:57,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:14:57,137 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash 553512453, now seen corresponding path program 1 times [2021-11-07 08:14:57,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:57,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339479077] [2021-11-07 08:14:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:57,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:57,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:57,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339479077] [2021-11-07 08:14:57,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339479077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:57,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:57,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:14:57,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884086997] [2021-11-07 08:14:57,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:14:57,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:57,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:14:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:57,379 INFO L87 Difference]: Start difference. First operand 376 states and 571 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:57,658 INFO L93 Difference]: Finished difference Result 1628 states and 2507 transitions. [2021-11-07 08:14:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:14:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 08:14:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:57,676 INFO L225 Difference]: With dead ends: 1628 [2021-11-07 08:14:57,676 INFO L226 Difference]: Without dead ends: 1282 [2021-11-07 08:14:57,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-11-07 08:14:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1276. [2021-11-07 08:14:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 1.5333333333333334) internal successors, (1955), 1275 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1955 transitions. [2021-11-07 08:14:57,765 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1955 transitions. Word has length 55 [2021-11-07 08:14:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:57,766 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1955 transitions. [2021-11-07 08:14:57,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1955 transitions. [2021-11-07 08:14:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:14:57,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:57,769 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:57,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:14:57,769 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:57,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2103455071, now seen corresponding path program 1 times [2021-11-07 08:14:57,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:57,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852826457] [2021-11-07 08:14:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:57,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:57,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:57,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852826457] [2021-11-07 08:14:57,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852826457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:57,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:57,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:14:57,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14200582] [2021-11-07 08:14:57,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:14:57,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:14:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:57,875 INFO L87 Difference]: Start difference. First operand 1276 states and 1955 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:58,029 INFO L93 Difference]: Finished difference Result 3480 states and 5325 transitions. [2021-11-07 08:14:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:14:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 08:14:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:58,048 INFO L225 Difference]: With dead ends: 3480 [2021-11-07 08:14:58,048 INFO L226 Difference]: Without dead ends: 2234 [2021-11-07 08:14:58,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:14:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-11-07 08:14:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2232. [2021-11-07 08:14:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 1.5091887046167638) internal successors, (3367), 2231 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 3367 transitions. [2021-11-07 08:14:58,217 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 3367 transitions. Word has length 55 [2021-11-07 08:14:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:58,218 INFO L470 AbstractCegarLoop]: Abstraction has 2232 states and 3367 transitions. [2021-11-07 08:14:58,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 3367 transitions. [2021-11-07 08:14:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:14:58,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:58,220 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:58,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:14:58,221 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:58,223 INFO L85 PathProgramCache]: Analyzing trace with hash 205170536, now seen corresponding path program 1 times [2021-11-07 08:14:58,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:58,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791545742] [2021-11-07 08:14:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:58,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:58,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:58,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791545742] [2021-11-07 08:14:58,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791545742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:58,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:58,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:14:58,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141164829] [2021-11-07 08:14:58,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:14:58,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:14:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:14:58,471 INFO L87 Difference]: Start difference. First operand 2232 states and 3367 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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) [2021-11-07 08:14:59,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:59,093 INFO L93 Difference]: Finished difference Result 10066 states and 15244 transitions. [2021-11-07 08:14:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:14:59,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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 56 [2021-11-07 08:14:59,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:59,157 INFO L225 Difference]: With dead ends: 10066 [2021-11-07 08:14:59,157 INFO L226 Difference]: Without dead ends: 7864 [2021-11-07 08:14:59,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:14:59,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7864 states. [2021-11-07 08:14:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7864 to 4432. [2021-11-07 08:14:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 1.4838636876551567) internal successors, (6575), 4431 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6575 transitions. [2021-11-07 08:14:59,568 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6575 transitions. Word has length 56 [2021-11-07 08:14:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:59,569 INFO L470 AbstractCegarLoop]: Abstraction has 4432 states and 6575 transitions. [2021-11-07 08:14:59,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 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) [2021-11-07 08:14:59,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6575 transitions. [2021-11-07 08:14:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 08:14:59,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:59,573 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:59,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:14:59,575 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:59,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1681995988, now seen corresponding path program 1 times [2021-11-07 08:14:59,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:59,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488575253] [2021-11-07 08:14:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:59,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:59,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:59,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488575253] [2021-11-07 08:14:59,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488575253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:14:59,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:14:59,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:14:59,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186299622] [2021-11-07 08:14:59,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:14:59,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:14:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:14:59,764 INFO L87 Difference]: Start difference. First operand 4432 states and 6575 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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) [2021-11-07 08:15:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:00,497 INFO L93 Difference]: Finished difference Result 9346 states and 13632 transitions. [2021-11-07 08:15:00,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:15:00,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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 57 [2021-11-07 08:15:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:00,558 INFO L225 Difference]: With dead ends: 9346 [2021-11-07 08:15:00,558 INFO L226 Difference]: Without dead ends: 9344 [2021-11-07 08:15:00,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:15:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-11-07 08:15:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 4816. [2021-11-07 08:15:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4816 states, 4815 states have (on average 1.44527518172378) internal successors, (6959), 4815 states have internal predecessors, (6959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6959 transitions. [2021-11-07 08:15:01,078 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6959 transitions. Word has length 57 [2021-11-07 08:15:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:01,079 INFO L470 AbstractCegarLoop]: Abstraction has 4816 states and 6959 transitions. [2021-11-07 08:15:01,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 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) [2021-11-07 08:15:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6959 transitions. [2021-11-07 08:15:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:15:01,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:01,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:01,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:15:01,081 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash 654846656, now seen corresponding path program 1 times [2021-11-07 08:15:01,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:01,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523106727] [2021-11-07 08:15:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:01,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:01,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:01,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523106727] [2021-11-07 08:15:01,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523106727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:01,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:01,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:01,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710987332] [2021-11-07 08:15:01,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:01,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:01,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:01,131 INFO L87 Difference]: Start difference. First operand 4816 states and 6959 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:01,615 INFO L93 Difference]: Finished difference Result 11534 states and 16675 transitions. [2021-11-07 08:15:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 08:15:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:01,655 INFO L225 Difference]: With dead ends: 11534 [2021-11-07 08:15:01,655 INFO L226 Difference]: Without dead ends: 6748 [2021-11-07 08:15:01,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2021-11-07 08:15:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6746. [2021-11-07 08:15:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6746 states, 6745 states have (on average 1.4364714603409934) internal successors, (9689), 6745 states have internal predecessors, (9689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 9689 transitions. [2021-11-07 08:15:02,238 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 9689 transitions. Word has length 58 [2021-11-07 08:15:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:02,239 INFO L470 AbstractCegarLoop]: Abstraction has 6746 states and 9689 transitions. [2021-11-07 08:15:02,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:02,239 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 9689 transitions. [2021-11-07 08:15:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 08:15:02,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:02,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:02,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:15:02,249 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2133316492, now seen corresponding path program 1 times [2021-11-07 08:15:02,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:02,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979964408] [2021-11-07 08:15:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:02,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:02,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:15:02,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:02,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979964408] [2021-11-07 08:15:02,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979964408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:02,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501185490] [2021-11-07 08:15:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:02,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:02,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:02,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:02,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:15:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:02,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:15:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:15:03,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501185490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:03,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:03,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-11-07 08:15:03,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530813919] [2021-11-07 08:15:03,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:15:03,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:15:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:15:03,184 INFO L87 Difference]: Start difference. First operand 6746 states and 9689 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:04,341 INFO L93 Difference]: Finished difference Result 16729 states and 24154 transitions. [2021-11-07 08:15:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:15:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 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 81 [2021-11-07 08:15:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:04,392 INFO L225 Difference]: With dead ends: 16729 [2021-11-07 08:15:04,392 INFO L226 Difference]: Without dead ends: 11943 [2021-11-07 08:15:04,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:15:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11943 states. [2021-11-07 08:15:05,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11943 to 11178. [2021-11-07 08:15:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11178 states, 11177 states have (on average 1.4294533416838149) internal successors, (15977), 11177 states have internal predecessors, (15977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11178 states to 11178 states and 15977 transitions. [2021-11-07 08:15:05,263 INFO L78 Accepts]: Start accepts. Automaton has 11178 states and 15977 transitions. Word has length 81 [2021-11-07 08:15:05,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:05,264 INFO L470 AbstractCegarLoop]: Abstraction has 11178 states and 15977 transitions. [2021-11-07 08:15:05,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 11178 states and 15977 transitions. [2021-11-07 08:15:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:15:05,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:05,277 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:05,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:05,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:05,505 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:05,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash -963170832, now seen corresponding path program 1 times [2021-11-07 08:15:05,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:05,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496445361] [2021-11-07 08:15:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:05,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:15:05,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:05,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496445361] [2021-11-07 08:15:05,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496445361] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:05,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:05,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:15:05,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207977837] [2021-11-07 08:15:05,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:15:05,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:15:05,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:15:05,697 INFO L87 Difference]: Start difference. First operand 11178 states and 15977 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:06,921 INFO L93 Difference]: Finished difference Result 23588 states and 33990 transitions. [2021-11-07 08:15:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:15:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 08:15:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:06,982 INFO L225 Difference]: With dead ends: 23588 [2021-11-07 08:15:06,982 INFO L226 Difference]: Without dead ends: 19110 [2021-11-07 08:15:06,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:15:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19110 states. [2021-11-07 08:15:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19110 to 15130. [2021-11-07 08:15:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15130 states, 15129 states have (on average 1.4285808711745653) internal successors, (21613), 15129 states have internal predecessors, (21613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15130 states to 15130 states and 21613 transitions. [2021-11-07 08:15:07,989 INFO L78 Accepts]: Start accepts. Automaton has 15130 states and 21613 transitions. Word has length 82 [2021-11-07 08:15:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:07,989 INFO L470 AbstractCegarLoop]: Abstraction has 15130 states and 21613 transitions. [2021-11-07 08:15:07,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 15130 states and 21613 transitions. [2021-11-07 08:15:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:15:07,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:07,997 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:07,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 08:15:07,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:07,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1851338368, now seen corresponding path program 1 times [2021-11-07 08:15:07,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:07,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049947666] [2021-11-07 08:15:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:07,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:08,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:08,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049947666] [2021-11-07 08:15:08,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049947666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:08,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:08,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:08,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842397488] [2021-11-07 08:15:08,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:08,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:08,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:08,067 INFO L87 Difference]: Start difference. First operand 15130 states and 21613 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:09,160 INFO L93 Difference]: Finished difference Result 30442 states and 43476 transitions. [2021-11-07 08:15:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:09,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 08:15:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:09,222 INFO L225 Difference]: With dead ends: 30442 [2021-11-07 08:15:09,222 INFO L226 Difference]: Without dead ends: 21536 [2021-11-07 08:15:09,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21536 states. [2021-11-07 08:15:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21536 to 19950. [2021-11-07 08:15:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19950 states, 19949 states have (on average 1.4112988119705248) internal successors, (28154), 19949 states have internal predecessors, (28154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19950 states to 19950 states and 28154 transitions. [2021-11-07 08:15:10,318 INFO L78 Accepts]: Start accepts. Automaton has 19950 states and 28154 transitions. Word has length 82 [2021-11-07 08:15:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:10,318 INFO L470 AbstractCegarLoop]: Abstraction has 19950 states and 28154 transitions. [2021-11-07 08:15:10,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 19950 states and 28154 transitions. [2021-11-07 08:15:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:15:10,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:10,327 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:10,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:15:10,328 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:10,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2016282864, now seen corresponding path program 1 times [2021-11-07 08:15:10,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:10,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791197631] [2021-11-07 08:15:10,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:10,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:10,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:10,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791197631] [2021-11-07 08:15:10,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791197631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:10,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:10,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:10,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524055921] [2021-11-07 08:15:10,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:10,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:10,387 INFO L87 Difference]: Start difference. First operand 19950 states and 28154 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:11,701 INFO L93 Difference]: Finished difference Result 31903 states and 44784 transitions. [2021-11-07 08:15:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:11,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 08:15:11,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:11,753 INFO L225 Difference]: With dead ends: 31903 [2021-11-07 08:15:11,753 INFO L226 Difference]: Without dead ends: 20905 [2021-11-07 08:15:11,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20905 states. [2021-11-07 08:15:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20905 to 20101. [2021-11-07 08:15:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20101 states, 20100 states have (on average 1.3820398009950248) internal successors, (27779), 20100 states have internal predecessors, (27779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20101 states to 20101 states and 27779 transitions. [2021-11-07 08:15:12,838 INFO L78 Accepts]: Start accepts. Automaton has 20101 states and 27779 transitions. Word has length 82 [2021-11-07 08:15:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:12,839 INFO L470 AbstractCegarLoop]: Abstraction has 20101 states and 27779 transitions. [2021-11-07 08:15:12,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 20101 states and 27779 transitions. [2021-11-07 08:15:12,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:15:12,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:12,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:12,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 08:15:12,849 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash 990402630, now seen corresponding path program 1 times [2021-11-07 08:15:12,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:12,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003207485] [2021-11-07 08:15:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:12,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:12,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:12,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003207485] [2021-11-07 08:15:12,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003207485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:12,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:12,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:12,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889686178] [2021-11-07 08:15:12,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:12,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:12,903 INFO L87 Difference]: Start difference. First operand 20101 states and 27779 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:14,656 INFO L93 Difference]: Finished difference Result 54066 states and 74617 transitions. [2021-11-07 08:15:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 08:15:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:14,755 INFO L225 Difference]: With dead ends: 54066 [2021-11-07 08:15:14,755 INFO L226 Difference]: Without dead ends: 36407 [2021-11-07 08:15:14,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36407 states. [2021-11-07 08:15:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36407 to 36291. [2021-11-07 08:15:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36291 states, 36290 states have (on average 1.3642325709561862) internal successors, (49508), 36290 states have internal predecessors, (49508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36291 states to 36291 states and 49508 transitions. [2021-11-07 08:15:17,121 INFO L78 Accepts]: Start accepts. Automaton has 36291 states and 49508 transitions. Word has length 82 [2021-11-07 08:15:17,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:17,121 INFO L470 AbstractCegarLoop]: Abstraction has 36291 states and 49508 transitions. [2021-11-07 08:15:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 36291 states and 49508 transitions. [2021-11-07 08:15:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:15:17,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:17,137 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:17,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 08:15:17,138 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash -634913072, now seen corresponding path program 1 times [2021-11-07 08:15:17,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:17,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921825915] [2021-11-07 08:15:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:17,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 08:15:17,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:17,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921825915] [2021-11-07 08:15:17,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921825915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:17,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:17,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:15:17,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059384941] [2021-11-07 08:15:17,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:15:17,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:17,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:15:17,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:15:17,251 INFO L87 Difference]: Start difference. First operand 36291 states and 49508 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:20,694 INFO L93 Difference]: Finished difference Result 62880 states and 86766 transitions. [2021-11-07 08:15:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:15:20,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 08:15:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:20,800 INFO L225 Difference]: With dead ends: 62880 [2021-11-07 08:15:20,801 INFO L226 Difference]: Without dead ends: 57030 [2021-11-07 08:15:20,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:15:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57030 states. [2021-11-07 08:15:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57030 to 41851. [2021-11-07 08:15:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41851 states, 41850 states have (on average 1.3661170848267623) internal successors, (57172), 41850 states have internal predecessors, (57172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41851 states to 41851 states and 57172 transitions. [2021-11-07 08:15:23,279 INFO L78 Accepts]: Start accepts. Automaton has 41851 states and 57172 transitions. Word has length 82 [2021-11-07 08:15:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:23,279 INFO L470 AbstractCegarLoop]: Abstraction has 41851 states and 57172 transitions. [2021-11-07 08:15:23,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 41851 states and 57172 transitions. [2021-11-07 08:15:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:15:23,294 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:23,295 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:23,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 08:15:23,295 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:23,296 INFO L85 PathProgramCache]: Analyzing trace with hash 620499738, now seen corresponding path program 1 times [2021-11-07 08:15:23,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:23,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691224974] [2021-11-07 08:15:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:23,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:15:23,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:23,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691224974] [2021-11-07 08:15:23,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691224974] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:23,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:23,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:15:23,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579448850] [2021-11-07 08:15:23,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:15:23,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:15:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:15:23,409 INFO L87 Difference]: Start difference. First operand 41851 states and 57172 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:27,294 INFO L93 Difference]: Finished difference Result 71227 states and 98334 transitions. [2021-11-07 08:15:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:15:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 08:15:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:27,391 INFO L225 Difference]: With dead ends: 71227 [2021-11-07 08:15:27,391 INFO L226 Difference]: Without dead ends: 62435 [2021-11-07 08:15:27,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:15:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62435 states. [2021-11-07 08:15:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62435 to 50171. [2021-11-07 08:15:30,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50171 states, 50170 states have (on average 1.3674307354993023) internal successors, (68604), 50170 states have internal predecessors, (68604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50171 states to 50171 states and 68604 transitions. [2021-11-07 08:15:30,811 INFO L78 Accepts]: Start accepts. Automaton has 50171 states and 68604 transitions. Word has length 82 [2021-11-07 08:15:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:30,812 INFO L470 AbstractCegarLoop]: Abstraction has 50171 states and 68604 transitions. [2021-11-07 08:15:30,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand 50171 states and 68604 transitions. [2021-11-07 08:15:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 08:15:30,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:30,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:30,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 08:15:30,826 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1892417630, now seen corresponding path program 1 times [2021-11-07 08:15:30,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:30,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836936297] [2021-11-07 08:15:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:30,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:15:30,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:30,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836936297] [2021-11-07 08:15:30,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836936297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:30,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:30,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 08:15:30,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065807851] [2021-11-07 08:15:30,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:15:30,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:30,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:15:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:15:30,960 INFO L87 Difference]: Start difference. First operand 50171 states and 68604 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:35,509 INFO L93 Difference]: Finished difference Result 81878 states and 112815 transitions. [2021-11-07 08:15:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:15:35,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 08:15:35,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:35,627 INFO L225 Difference]: With dead ends: 81878 [2021-11-07 08:15:35,627 INFO L226 Difference]: Without dead ends: 73241 [2021-11-07 08:15:35,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:15:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73241 states. [2021-11-07 08:15:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73241 to 57379. [2021-11-07 08:15:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57379 states, 57378 states have (on average 1.3662205026316707) internal successors, (78391), 57378 states have internal predecessors, (78391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57379 states to 57379 states and 78391 transitions. [2021-11-07 08:15:39,679 INFO L78 Accepts]: Start accepts. Automaton has 57379 states and 78391 transitions. Word has length 83 [2021-11-07 08:15:39,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:39,679 INFO L470 AbstractCegarLoop]: Abstraction has 57379 states and 78391 transitions. [2021-11-07 08:15:39,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:39,680 INFO L276 IsEmpty]: Start isEmpty. Operand 57379 states and 78391 transitions. [2021-11-07 08:15:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:15:39,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:39,695 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:39,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 08:15:39,695 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1564512682, now seen corresponding path program 1 times [2021-11-07 08:15:39,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:39,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839782986] [2021-11-07 08:15:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:39,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:39,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:39,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839782986] [2021-11-07 08:15:39,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839782986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:39,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:39,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:39,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978375972] [2021-11-07 08:15:39,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:39,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:39,749 INFO L87 Difference]: Start difference. First operand 57379 states and 78391 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:45,591 INFO L93 Difference]: Finished difference Result 153324 states and 208444 transitions. [2021-11-07 08:15:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-11-07 08:15:45,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:45,761 INFO L225 Difference]: With dead ends: 153324 [2021-11-07 08:15:45,762 INFO L226 Difference]: Without dead ends: 98055 [2021-11-07 08:15:45,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98055 states. [2021-11-07 08:15:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98055 to 93407. [2021-11-07 08:15:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93407 states, 93406 states have (on average 1.3431042973684775) internal successors, (125454), 93406 states have internal predecessors, (125454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93407 states to 93407 states and 125454 transitions. [2021-11-07 08:15:52,814 INFO L78 Accepts]: Start accepts. Automaton has 93407 states and 125454 transitions. Word has length 85 [2021-11-07 08:15:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:52,814 INFO L470 AbstractCegarLoop]: Abstraction has 93407 states and 125454 transitions. [2021-11-07 08:15:52,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 93407 states and 125454 transitions. [2021-11-07 08:15:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 08:15:52,840 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:52,841 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:52,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 08:15:52,841 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:52,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1950885767, now seen corresponding path program 1 times [2021-11-07 08:15:52,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:52,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804485622] [2021-11-07 08:15:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:52,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:52,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:52,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804485622] [2021-11-07 08:15:52,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804485622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:52,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297851455] [2021-11-07 08:15:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:52,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:52,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:52,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:52,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_658f56c9-43b7-48c7-919a-bdef653641bd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:15:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:15:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:53,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297851455] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:53,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:53,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 08:15:53,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612165754] [2021-11-07 08:15:53,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:15:53,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:53,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:15:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:15:53,966 INFO L87 Difference]: Start difference. First operand 93407 states and 125454 transitions. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)