/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/locks/test_locks_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 13:40:47,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 13:40:47,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 13:40:47,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 13:40:47,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 13:40:47,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 13:40:47,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 13:40:47,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 13:40:47,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 13:40:47,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 13:40:47,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 13:40:47,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 13:40:47,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 13:40:47,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 13:40:47,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 13:40:47,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 13:40:47,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 13:40:47,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 13:40:47,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 13:40:47,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 13:40:47,234 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 13:40:47,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 13:40:47,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 13:40:47,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 13:40:47,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 13:40:47,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-06 13:40:47,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-06 13:40:47,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-06 13:40:47,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-06 13:40:47,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-06 13:40:47,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-06 13:40:47,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 13:40:47,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 13:40:47,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 13:40:47,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 13:40:47,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 13:40:47,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 13:40:47,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 13:40:47,253 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 13:40:47,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 13:40:47,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 13:40:47,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 13:40:47,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 13:40:47,283 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 13:40:47,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 13:40:47,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 13:40:47,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 13:40:47,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 13:40:47,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 13:40:47,285 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 13:40:47,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 13:40:47,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 13:40:47,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 13:40:47,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 13:40:47,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 13:40:47,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 13:40:47,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 13:40:47,286 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 13:40:47,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 13:40:47,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 13:40:47,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 13:40:47,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 13:40:47,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:40:47,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 13:40:47,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 13:40:47,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 13:40:47,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 13:40:47,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 13:40:47,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 13:40:47,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 13:40:47,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 13:40:47,289 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 13:40:47,289 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 13:40:47,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 13:40:47,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 13:40:47,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 13:40:47,460 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 13:40:47,461 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 13:40:47,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_13.c [2022-04-06 13:40:47,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6030aef/b5975d19af964abe8cdcd2ebf47745bd/FLAG2a2bcae1e [2022-04-06 13:40:47,817 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 13:40:47,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c [2022-04-06 13:40:47,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6030aef/b5975d19af964abe8cdcd2ebf47745bd/FLAG2a2bcae1e [2022-04-06 13:40:48,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d6030aef/b5975d19af964abe8cdcd2ebf47745bd [2022-04-06 13:40:48,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 13:40:48,250 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 13:40:48,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 13:40:48,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 13:40:48,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 13:40:48,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@647bd738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48, skipping insertion in model container [2022-04-06 13:40:48,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 13:40:48,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 13:40:48,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c[4936,4949] [2022-04-06 13:40:48,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:40:48,452 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 13:40:48,484 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_13.c[4936,4949] [2022-04-06 13:40:48,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 13:40:48,495 INFO L208 MainTranslator]: Completed translation [2022-04-06 13:40:48,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48 WrapperNode [2022-04-06 13:40:48,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 13:40:48,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 13:40:48,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 13:40:48,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 13:40:48,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 13:40:48,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 13:40:48,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 13:40:48,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 13:40:48,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 13:40:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 13:40:48,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 13:40:48,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 13:40:48,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 13:40:48,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 13:40:48,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 13:40:48,592 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 13:40:48,592 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 13:40:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 13:40:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 13:40:48,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 13:40:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 13:40:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 13:40:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 13:40:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 13:40:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 13:40:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 13:40:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 13:40:48,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 13:40:48,638 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 13:40:48,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 13:40:48,838 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 13:40:48,855 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 13:40:48,855 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 13:40:48,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:40:48 BoogieIcfgContainer [2022-04-06 13:40:48,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 13:40:48,857 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 13:40:48,857 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 13:40:48,858 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 13:40:48,860 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:40:48" (1/1) ... [2022-04-06 13:40:48,861 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 13:40:48,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:40:48 BasicIcfg [2022-04-06 13:40:48,879 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 13:40:48,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 13:40:48,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 13:40:48,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 13:40:48,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 01:40:48" (1/4) ... [2022-04-06 13:40:48,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41262d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:40:48, skipping insertion in model container [2022-04-06 13:40:48,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 01:40:48" (2/4) ... [2022-04-06 13:40:48,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41262d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 01:40:48, skipping insertion in model container [2022-04-06 13:40:48,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 01:40:48" (3/4) ... [2022-04-06 13:40:48,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41262d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 01:40:48, skipping insertion in model container [2022-04-06 13:40:48,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 01:40:48" (4/4) ... [2022-04-06 13:40:48,885 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_13.cqvasr [2022-04-06 13:40:48,888 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 13:40:48,888 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 13:40:48,938 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 13:40:48,945 INFO L340 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=FINITE_AUTOMATA, 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 [2022-04-06 13:40:48,945 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 13:40:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 13:40:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 13:40:48,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:48,966 INFO L499 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] [2022-04-06 13:40:48,967 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1381361359, now seen corresponding path program 1 times [2022-04-06 13:40:48,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:48,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792654757] [2022-04-06 13:40:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:48,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:49,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:49,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792654757] [2022-04-06 13:40:49,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792654757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:49,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:49,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:49,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447108495] [2022-04-06 13:40:49,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:49,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:49,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:49,221 INFO L87 Difference]: Start difference. First operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:49,384 INFO L93 Difference]: Finished difference Result 106 states and 187 transitions. [2022-04-06 13:40:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:49,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 13:40:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:49,391 INFO L225 Difference]: With dead ends: 106 [2022-04-06 13:40:49,391 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 13:40:49,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:49,395 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 225 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:49,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 107 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 13:40:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2022-04-06 13:40:49,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.88135593220339) internal successors, (111), 59 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2022-04-06 13:40:49,420 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 24 [2022-04-06 13:40:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:49,421 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2022-04-06 13:40:49,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2022-04-06 13:40:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 13:40:49,422 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:49,422 INFO L499 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] [2022-04-06 13:40:49,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 13:40:49,422 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1891895536, now seen corresponding path program 1 times [2022-04-06 13:40:49,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:49,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147879373] [2022-04-06 13:40:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:49,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:49,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147879373] [2022-04-06 13:40:49,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147879373] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:49,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:49,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156873161] [2022-04-06 13:40:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:49,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:49,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:49,470 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:49,583 INFO L93 Difference]: Finished difference Result 148 states and 273 transitions. [2022-04-06 13:40:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:49,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-06 13:40:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:49,585 INFO L225 Difference]: With dead ends: 148 [2022-04-06 13:40:49,586 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 13:40:49,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:49,587 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 193 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:49,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 119 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 13:40:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-04-06 13:40:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.8705882352941177) internal successors, (159), 85 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 162 transitions. [2022-04-06 13:40:49,598 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 162 transitions. Word has length 24 [2022-04-06 13:40:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:49,599 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 162 transitions. [2022-04-06 13:40:49,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 162 transitions. [2022-04-06 13:40:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 13:40:49,599 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:49,600 INFO L499 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] [2022-04-06 13:40:49,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 13:40:49,600 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 127502905, now seen corresponding path program 1 times [2022-04-06 13:40:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:49,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521047885] [2022-04-06 13:40:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:49,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:49,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:49,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521047885] [2022-04-06 13:40:49,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521047885] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:49,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:49,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:49,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550464090] [2022-04-06 13:40:49,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:49,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:49,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:49,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:49,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:49,670 INFO L87 Difference]: Start difference. First operand 89 states and 162 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:49,769 INFO L93 Difference]: Finished difference Result 136 states and 244 transitions. [2022-04-06 13:40:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 13:40:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:49,773 INFO L225 Difference]: With dead ends: 136 [2022-04-06 13:40:49,773 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 13:40:49,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:49,779 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:49,779 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:49,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 13:40:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-04-06 13:40:49,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.8295454545454546) internal successors, (161), 88 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 164 transitions. [2022-04-06 13:40:49,785 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 164 transitions. Word has length 25 [2022-04-06 13:40:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:49,785 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 164 transitions. [2022-04-06 13:40:49,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 164 transitions. [2022-04-06 13:40:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 13:40:49,786 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:49,786 INFO L499 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] [2022-04-06 13:40:49,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 13:40:49,786 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:49,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1480812602, now seen corresponding path program 1 times [2022-04-06 13:40:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:49,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876884140] [2022-04-06 13:40:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:49,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:49,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876884140] [2022-04-06 13:40:49,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876884140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:49,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:49,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:49,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058545736] [2022-04-06 13:40:49,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:49,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:49,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:49,855 INFO L87 Difference]: Start difference. First operand 92 states and 164 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:49,957 INFO L93 Difference]: Finished difference Result 173 states and 313 transitions. [2022-04-06 13:40:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 13:40:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:49,959 INFO L225 Difference]: With dead ends: 173 [2022-04-06 13:40:49,959 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 13:40:49,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:49,966 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 212 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:49,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 13:40:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 121. [2022-04-06 13:40:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.829059829059829) internal successors, (214), 117 states have internal predecessors, (214), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 217 transitions. [2022-04-06 13:40:49,979 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 217 transitions. Word has length 25 [2022-04-06 13:40:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:49,979 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 217 transitions. [2022-04-06 13:40:49,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 217 transitions. [2022-04-06 13:40:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 13:40:49,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:49,980 INFO L499 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] [2022-04-06 13:40:49,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 13:40:49,980 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash 970278425, now seen corresponding path program 1 times [2022-04-06 13:40:49,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:49,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517850865] [2022-04-06 13:40:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:49,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:50,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:50,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517850865] [2022-04-06 13:40:50,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517850865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:50,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:50,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:50,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199558473] [2022-04-06 13:40:50,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:50,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:50,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:50,052 INFO L87 Difference]: Start difference. First operand 121 states and 217 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:50,125 INFO L93 Difference]: Finished difference Result 285 states and 519 transitions. [2022-04-06 13:40:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:50,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 13:40:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:50,130 INFO L225 Difference]: With dead ends: 285 [2022-04-06 13:40:50,130 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 13:40:50,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:50,137 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:50,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 121 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 13:40:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-04-06 13:40:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.8203592814371257) internal successors, (304), 167 states have internal predecessors, (304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 307 transitions. [2022-04-06 13:40:50,150 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 307 transitions. Word has length 25 [2022-04-06 13:40:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:50,150 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 307 transitions. [2022-04-06 13:40:50,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 307 transitions. [2022-04-06 13:40:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 13:40:50,151 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:50,151 INFO L499 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] [2022-04-06 13:40:50,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 13:40:50,151 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1339417396, now seen corresponding path program 1 times [2022-04-06 13:40:50,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054025190] [2022-04-06 13:40:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:50,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:50,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:50,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054025190] [2022-04-06 13:40:50,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054025190] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:50,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:50,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:50,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16780033] [2022-04-06 13:40:50,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:50,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:50,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:50,205 INFO L87 Difference]: Start difference. First operand 171 states and 307 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:50,280 INFO L93 Difference]: Finished difference Result 256 states and 458 transitions. [2022-04-06 13:40:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:50,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 13:40:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:50,281 INFO L225 Difference]: With dead ends: 256 [2022-04-06 13:40:50,282 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 13:40:50,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:50,282 INFO L913 BasicCegarLoop]: 133 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:50,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 140 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 13:40:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-04-06 13:40:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.7988165680473374) internal successors, (304), 169 states have internal predecessors, (304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 307 transitions. [2022-04-06 13:40:50,304 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 307 transitions. Word has length 26 [2022-04-06 13:40:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:50,305 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 307 transitions. [2022-04-06 13:40:50,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 307 transitions. [2022-04-06 13:40:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 13:40:50,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:50,306 INFO L499 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] [2022-04-06 13:40:50,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 13:40:50,306 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:50,306 INFO L85 PathProgramCache]: Analyzing trace with hash 13892301, now seen corresponding path program 1 times [2022-04-06 13:40:50,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:50,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528488494] [2022-04-06 13:40:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:50,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:50,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:50,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528488494] [2022-04-06 13:40:50,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528488494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:50,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:50,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:50,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023797884] [2022-04-06 13:40:50,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:50,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:50,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:50,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:50,362 INFO L87 Difference]: Start difference. First operand 173 states and 307 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:50,454 INFO L93 Difference]: Finished difference Result 493 states and 885 transitions. [2022-04-06 13:40:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:50,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 13:40:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:50,457 INFO L225 Difference]: With dead ends: 493 [2022-04-06 13:40:50,457 INFO L226 Difference]: Without dead ends: 331 [2022-04-06 13:40:50,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:50,460 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 209 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:50,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 98 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-04-06 13:40:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 329. [2022-04-06 13:40:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.7846153846153847) internal successors, (580), 325 states have internal predecessors, (580), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 583 transitions. [2022-04-06 13:40:50,478 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 583 transitions. Word has length 26 [2022-04-06 13:40:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:50,478 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 583 transitions. [2022-04-06 13:40:50,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 583 transitions. [2022-04-06 13:40:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 13:40:50,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:50,484 INFO L499 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] [2022-04-06 13:40:50,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 13:40:50,485 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash 524426478, now seen corresponding path program 1 times [2022-04-06 13:40:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:50,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059696315] [2022-04-06 13:40:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:50,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:50,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059696315] [2022-04-06 13:40:50,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059696315] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:50,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:50,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:50,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655253756] [2022-04-06 13:40:50,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:50,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:50,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:50,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:50,523 INFO L87 Difference]: Start difference. First operand 329 states and 583 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:50,578 INFO L93 Difference]: Finished difference Result 421 states and 753 transitions. [2022-04-06 13:40:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:50,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 13:40:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:50,580 INFO L225 Difference]: With dead ends: 421 [2022-04-06 13:40:50,580 INFO L226 Difference]: Without dead ends: 419 [2022-04-06 13:40:50,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:50,581 INFO L913 BasicCegarLoop]: 153 mSDtfsCounter, 135 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:50,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-04-06 13:40:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 329. [2022-04-06 13:40:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 325 states have (on average 1.7723076923076924) internal successors, (576), 325 states have internal predecessors, (576), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 579 transitions. [2022-04-06 13:40:50,590 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 579 transitions. Word has length 26 [2022-04-06 13:40:50,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:50,590 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 579 transitions. [2022-04-06 13:40:50,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,591 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 579 transitions. [2022-04-06 13:40:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 13:40:50,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:50,592 INFO L499 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] [2022-04-06 13:40:50,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 13:40:50,594 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash 430693653, now seen corresponding path program 1 times [2022-04-06 13:40:50,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:50,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787784494] [2022-04-06 13:40:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:50,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:50,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:50,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787784494] [2022-04-06 13:40:50,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787784494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:50,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:50,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:50,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766067582] [2022-04-06 13:40:50,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:50,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:50,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:50,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:50,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:50,643 INFO L87 Difference]: Start difference. First operand 329 states and 579 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:50,699 INFO L93 Difference]: Finished difference Result 617 states and 1101 transitions. [2022-04-06 13:40:50,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:50,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 13:40:50,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:50,702 INFO L225 Difference]: With dead ends: 617 [2022-04-06 13:40:50,702 INFO L226 Difference]: Without dead ends: 615 [2022-04-06 13:40:50,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:50,702 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 198 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:50,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-04-06 13:40:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 453. [2022-04-06 13:40:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 449 states have (on average 1.7461024498886415) internal successors, (784), 449 states have internal predecessors, (784), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 787 transitions. [2022-04-06 13:40:50,714 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 787 transitions. Word has length 27 [2022-04-06 13:40:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:50,715 INFO L478 AbstractCegarLoop]: Abstraction has 453 states and 787 transitions. [2022-04-06 13:40:50,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 787 transitions. [2022-04-06 13:40:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 13:40:50,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:50,716 INFO L499 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] [2022-04-06 13:40:50,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 13:40:50,716 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash -79840524, now seen corresponding path program 1 times [2022-04-06 13:40:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:50,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224176285] [2022-04-06 13:40:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:50,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:50,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224176285] [2022-04-06 13:40:50,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224176285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:50,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:50,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:50,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088942201] [2022-04-06 13:40:50,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:50,745 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:50,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:50,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:50,745 INFO L87 Difference]: Start difference. First operand 453 states and 787 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:50,806 INFO L93 Difference]: Finished difference Result 1081 states and 1893 transitions. [2022-04-06 13:40:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:50,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 13:40:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:50,808 INFO L225 Difference]: With dead ends: 1081 [2022-04-06 13:40:50,808 INFO L226 Difference]: Without dead ends: 639 [2022-04-06 13:40:50,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:50,809 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:50,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 125 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:50,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-04-06 13:40:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 637. [2022-04-06 13:40:50,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 633 states have (on average 1.7377567140600316) internal successors, (1100), 633 states have internal predecessors, (1100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1103 transitions. [2022-04-06 13:40:50,821 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1103 transitions. Word has length 27 [2022-04-06 13:40:50,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:50,821 INFO L478 AbstractCegarLoop]: Abstraction has 637 states and 1103 transitions. [2022-04-06 13:40:50,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,821 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1103 transitions. [2022-04-06 13:40:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:40:50,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:50,822 INFO L499 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] [2022-04-06 13:40:50,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 13:40:50,822 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:50,823 INFO L85 PathProgramCache]: Analyzing trace with hash 466633801, now seen corresponding path program 1 times [2022-04-06 13:40:50,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:50,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377710467] [2022-04-06 13:40:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:50,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:50,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:50,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377710467] [2022-04-06 13:40:50,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377710467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:50,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:50,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:50,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300468997] [2022-04-06 13:40:50,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:50,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:50,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:50,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:50,845 INFO L87 Difference]: Start difference. First operand 637 states and 1103 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:50,932 INFO L93 Difference]: Finished difference Result 961 states and 1661 transitions. [2022-04-06 13:40:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:50,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 13:40:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:50,935 INFO L225 Difference]: With dead ends: 961 [2022-04-06 13:40:50,935 INFO L226 Difference]: Without dead ends: 651 [2022-04-06 13:40:50,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:50,936 INFO L913 BasicCegarLoop]: 127 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:50,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 134 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-04-06 13:40:50,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 649. [2022-04-06 13:40:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 645 states have (on average 1.7178294573643411) internal successors, (1108), 645 states have internal predecessors, (1108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1111 transitions. [2022-04-06 13:40:50,948 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1111 transitions. Word has length 28 [2022-04-06 13:40:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:50,948 INFO L478 AbstractCegarLoop]: Abstraction has 649 states and 1111 transitions. [2022-04-06 13:40:50,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1111 transitions. [2022-04-06 13:40:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:40:50,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:50,949 INFO L499 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] [2022-04-06 13:40:50,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 13:40:50,949 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1819943498, now seen corresponding path program 1 times [2022-04-06 13:40:50,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:50,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104210953] [2022-04-06 13:40:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:50,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:50,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104210953] [2022-04-06 13:40:50,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104210953] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:50,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:50,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:50,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125644918] [2022-04-06 13:40:50,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:50,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:50,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:50,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:50,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:50,977 INFO L87 Difference]: Start difference. First operand 649 states and 1111 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:51,041 INFO L93 Difference]: Finished difference Result 1197 states and 2081 transitions. [2022-04-06 13:40:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 13:40:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:51,045 INFO L225 Difference]: With dead ends: 1197 [2022-04-06 13:40:51,045 INFO L226 Difference]: Without dead ends: 1195 [2022-04-06 13:40:51,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:51,046 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 191 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:51,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-04-06 13:40:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2022-04-06 13:40:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 901 states have (on average 1.6825749167591566) internal successors, (1516), 901 states have internal predecessors, (1516), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1519 transitions. [2022-04-06 13:40:51,063 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1519 transitions. Word has length 28 [2022-04-06 13:40:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:51,063 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1519 transitions. [2022-04-06 13:40:51,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1519 transitions. [2022-04-06 13:40:51,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 13:40:51,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:51,064 INFO L499 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] [2022-04-06 13:40:51,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 13:40:51,064 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1309409321, now seen corresponding path program 1 times [2022-04-06 13:40:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:51,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119027787] [2022-04-06 13:40:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:51,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:51,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119027787] [2022-04-06 13:40:51,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119027787] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:51,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:51,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:51,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905954751] [2022-04-06 13:40:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:51,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:51,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:51,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:51,087 INFO L87 Difference]: Start difference. First operand 905 states and 1519 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:51,154 INFO L93 Difference]: Finished difference Result 2141 states and 3617 transitions. [2022-04-06 13:40:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 13:40:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:51,158 INFO L225 Difference]: With dead ends: 2141 [2022-04-06 13:40:51,158 INFO L226 Difference]: Without dead ends: 1259 [2022-04-06 13:40:51,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:51,160 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:51,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 127 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-04-06 13:40:51,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1257. [2022-04-06 13:40:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1253 states have (on average 1.675977653631285) internal successors, (2100), 1253 states have internal predecessors, (2100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2103 transitions. [2022-04-06 13:40:51,182 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2103 transitions. Word has length 28 [2022-04-06 13:40:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:51,182 INFO L478 AbstractCegarLoop]: Abstraction has 1257 states and 2103 transitions. [2022-04-06 13:40:51,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2103 transitions. [2022-04-06 13:40:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 13:40:51,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:51,184 INFO L499 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] [2022-04-06 13:40:51,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 13:40:51,184 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:51,184 INFO L85 PathProgramCache]: Analyzing trace with hash 583706160, now seen corresponding path program 1 times [2022-04-06 13:40:51,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:51,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087435886] [2022-04-06 13:40:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:51,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:51,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087435886] [2022-04-06 13:40:51,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087435886] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:51,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:51,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:51,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594248150] [2022-04-06 13:40:51,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:51,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:51,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:51,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:51,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:51,208 INFO L87 Difference]: Start difference. First operand 1257 states and 2103 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:51,274 INFO L93 Difference]: Finished difference Result 1885 states and 3145 transitions. [2022-04-06 13:40:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:51,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 13:40:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:51,278 INFO L225 Difference]: With dead ends: 1885 [2022-04-06 13:40:51,278 INFO L226 Difference]: Without dead ends: 1275 [2022-04-06 13:40:51,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:51,279 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:51,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:51,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-04-06 13:40:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-04-06 13:40:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1269 states have (on average 1.6548463356973995) internal successors, (2100), 1269 states have internal predecessors, (2100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 2103 transitions. [2022-04-06 13:40:51,303 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 2103 transitions. Word has length 29 [2022-04-06 13:40:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:51,303 INFO L478 AbstractCegarLoop]: Abstraction has 1273 states and 2103 transitions. [2022-04-06 13:40:51,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 2103 transitions. [2022-04-06 13:40:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 13:40:51,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:51,305 INFO L499 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] [2022-04-06 13:40:51,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 13:40:51,305 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:51,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:51,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1937015857, now seen corresponding path program 1 times [2022-04-06 13:40:51,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:51,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443468501] [2022-04-06 13:40:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:51,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:51,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443468501] [2022-04-06 13:40:51,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443468501] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:51,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:51,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080621734] [2022-04-06 13:40:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:51,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:51,338 INFO L87 Difference]: Start difference. First operand 1273 states and 2103 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:51,408 INFO L93 Difference]: Finished difference Result 2317 states and 3897 transitions. [2022-04-06 13:40:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 13:40:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:51,414 INFO L225 Difference]: With dead ends: 2317 [2022-04-06 13:40:51,414 INFO L226 Difference]: Without dead ends: 2315 [2022-04-06 13:40:51,416 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:51,417 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:51,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-04-06 13:40:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1801. [2022-04-06 13:40:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1797 states have (on average 1.613800779076238) internal successors, (2900), 1797 states have internal predecessors, (2900), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2903 transitions. [2022-04-06 13:40:51,453 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2903 transitions. Word has length 29 [2022-04-06 13:40:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:51,453 INFO L478 AbstractCegarLoop]: Abstraction has 1801 states and 2903 transitions. [2022-04-06 13:40:51,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2903 transitions. [2022-04-06 13:40:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 13:40:51,455 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:51,455 INFO L499 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] [2022-04-06 13:40:51,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 13:40:51,456 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1426481680, now seen corresponding path program 1 times [2022-04-06 13:40:51,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:51,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790784667] [2022-04-06 13:40:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:51,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:51,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790784667] [2022-04-06 13:40:51,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790784667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:51,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:51,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:51,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730849775] [2022-04-06 13:40:51,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:51,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:51,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:51,490 INFO L87 Difference]: Start difference. First operand 1801 states and 2903 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:51,607 INFO L93 Difference]: Finished difference Result 4237 states and 6873 transitions. [2022-04-06 13:40:51,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:51,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 13:40:51,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:51,613 INFO L225 Difference]: With dead ends: 4237 [2022-04-06 13:40:51,614 INFO L226 Difference]: Without dead ends: 2475 [2022-04-06 13:40:51,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:51,616 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:51,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 129 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:51,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-04-06 13:40:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2473. [2022-04-06 13:40:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2469 states have (on average 1.608748481166464) internal successors, (3972), 2469 states have internal predecessors, (3972), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3975 transitions. [2022-04-06 13:40:51,656 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3975 transitions. Word has length 29 [2022-04-06 13:40:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:51,656 INFO L478 AbstractCegarLoop]: Abstraction has 2473 states and 3975 transitions. [2022-04-06 13:40:51,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3975 transitions. [2022-04-06 13:40:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 13:40:51,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:51,658 INFO L499 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] [2022-04-06 13:40:51,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-04-06 13:40:51,658 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash -82017883, now seen corresponding path program 1 times [2022-04-06 13:40:51,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:51,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146662878] [2022-04-06 13:40:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:51,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:51,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146662878] [2022-04-06 13:40:51,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146662878] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:51,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:51,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009495566] [2022-04-06 13:40:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:51,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:51,697 INFO L87 Difference]: Start difference. First operand 2473 states and 3975 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:51,778 INFO L93 Difference]: Finished difference Result 3709 states and 5945 transitions. [2022-04-06 13:40:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 13:40:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:51,785 INFO L225 Difference]: With dead ends: 3709 [2022-04-06 13:40:51,785 INFO L226 Difference]: Without dead ends: 2507 [2022-04-06 13:40:51,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:51,788 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:51,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 128 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-04-06 13:40:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2505. [2022-04-06 13:40:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2501 states have (on average 1.5881647341063574) internal successors, (3972), 2501 states have internal predecessors, (3972), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3975 transitions. [2022-04-06 13:40:51,832 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3975 transitions. Word has length 30 [2022-04-06 13:40:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:51,833 INFO L478 AbstractCegarLoop]: Abstraction has 2505 states and 3975 transitions. [2022-04-06 13:40:51,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3975 transitions. [2022-04-06 13:40:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 13:40:51,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:51,835 INFO L499 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] [2022-04-06 13:40:51,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-04-06 13:40:51,835 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:51,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1271291814, now seen corresponding path program 1 times [2022-04-06 13:40:51,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:51,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037992134] [2022-04-06 13:40:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:51,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:51,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:51,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037992134] [2022-04-06 13:40:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037992134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:51,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:51,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:51,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431261336] [2022-04-06 13:40:51,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:51,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:51,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:51,866 INFO L87 Difference]: Start difference. First operand 2505 states and 3975 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:51,950 INFO L93 Difference]: Finished difference Result 4493 states and 7273 transitions. [2022-04-06 13:40:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:51,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 13:40:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:51,961 INFO L225 Difference]: With dead ends: 4493 [2022-04-06 13:40:51,961 INFO L226 Difference]: Without dead ends: 4491 [2022-04-06 13:40:51,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:51,963 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:51,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-04-06 13:40:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 3593. [2022-04-06 13:40:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3589 states have (on average 1.5436054611312344) internal successors, (5540), 3589 states have internal predecessors, (5540), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 5543 transitions. [2022-04-06 13:40:52,024 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 5543 transitions. Word has length 30 [2022-04-06 13:40:52,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:52,024 INFO L478 AbstractCegarLoop]: Abstraction has 3593 states and 5543 transitions. [2022-04-06 13:40:52,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 5543 transitions. [2022-04-06 13:40:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 13:40:52,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:52,027 INFO L499 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] [2022-04-06 13:40:52,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-04-06 13:40:52,027 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:52,028 INFO L85 PathProgramCache]: Analyzing trace with hash 760757637, now seen corresponding path program 1 times [2022-04-06 13:40:52,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:52,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167360060] [2022-04-06 13:40:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:52,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:52,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:52,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167360060] [2022-04-06 13:40:52,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167360060] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:52,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:52,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:52,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136021489] [2022-04-06 13:40:52,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:52,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:52,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:52,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:52,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:52,046 INFO L87 Difference]: Start difference. First operand 3593 states and 5543 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:52,172 INFO L93 Difference]: Finished difference Result 8397 states and 13033 transitions. [2022-04-06 13:40:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 13:40:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:52,184 INFO L225 Difference]: With dead ends: 8397 [2022-04-06 13:40:52,184 INFO L226 Difference]: Without dead ends: 4875 [2022-04-06 13:40:52,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:52,189 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:52,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 131 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-04-06 13:40:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 4873. [2022-04-06 13:40:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4873 states, 4869 states have (on average 1.538714315054426) internal successors, (7492), 4869 states have internal predecessors, (7492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4873 states to 4873 states and 7495 transitions. [2022-04-06 13:40:52,284 INFO L78 Accepts]: Start accepts. Automaton has 4873 states and 7495 transitions. Word has length 30 [2022-04-06 13:40:52,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:52,285 INFO L478 AbstractCegarLoop]: Abstraction has 4873 states and 7495 transitions. [2022-04-06 13:40:52,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4873 states and 7495 transitions. [2022-04-06 13:40:52,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 13:40:52,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:52,289 INFO L499 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] [2022-04-06 13:40:52,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 13:40:52,289 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 755373388, now seen corresponding path program 1 times [2022-04-06 13:40:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:52,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110851047] [2022-04-06 13:40:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:52,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:52,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110851047] [2022-04-06 13:40:52,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110851047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:52,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:52,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:52,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104546261] [2022-04-06 13:40:52,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:52,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:52,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:52,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:52,310 INFO L87 Difference]: Start difference. First operand 4873 states and 7495 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:52,409 INFO L93 Difference]: Finished difference Result 7309 states and 11209 transitions. [2022-04-06 13:40:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 13:40:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:52,417 INFO L225 Difference]: With dead ends: 7309 [2022-04-06 13:40:52,417 INFO L226 Difference]: Without dead ends: 4939 [2022-04-06 13:40:52,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:52,421 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 164 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:52,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 125 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:52,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2022-04-06 13:40:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 4937. [2022-04-06 13:40:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4933 states have (on average 1.5187512669774985) internal successors, (7492), 4933 states have internal predecessors, (7492), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 7495 transitions. [2022-04-06 13:40:52,517 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 7495 transitions. Word has length 31 [2022-04-06 13:40:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:52,517 INFO L478 AbstractCegarLoop]: Abstraction has 4937 states and 7495 transitions. [2022-04-06 13:40:52,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 7495 transitions. [2022-04-06 13:40:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 13:40:52,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:52,521 INFO L499 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] [2022-04-06 13:40:52,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 13:40:52,522 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:52,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2108683085, now seen corresponding path program 1 times [2022-04-06 13:40:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:52,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306019054] [2022-04-06 13:40:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:52,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:52,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:52,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306019054] [2022-04-06 13:40:52,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306019054] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:52,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:52,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:52,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340796080] [2022-04-06 13:40:52,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:52,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:52,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:52,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:52,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:52,546 INFO L87 Difference]: Start difference. First operand 4937 states and 7495 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:52,658 INFO L93 Difference]: Finished difference Result 8717 states and 13513 transitions. [2022-04-06 13:40:52,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:52,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 13:40:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:52,671 INFO L225 Difference]: With dead ends: 8717 [2022-04-06 13:40:52,671 INFO L226 Difference]: Without dead ends: 8715 [2022-04-06 13:40:52,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:52,675 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:52,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8715 states. [2022-04-06 13:40:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8715 to 7177. [2022-04-06 13:40:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7173 states have (on average 1.4727450160323434) internal successors, (10564), 7173 states have internal predecessors, (10564), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 10567 transitions. [2022-04-06 13:40:52,832 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 10567 transitions. Word has length 31 [2022-04-06 13:40:52,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:52,832 INFO L478 AbstractCegarLoop]: Abstraction has 7177 states and 10567 transitions. [2022-04-06 13:40:52,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 10567 transitions. [2022-04-06 13:40:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 13:40:52,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:52,839 INFO L499 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] [2022-04-06 13:40:52,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-04-06 13:40:52,839 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1598148908, now seen corresponding path program 1 times [2022-04-06 13:40:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:52,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591281774] [2022-04-06 13:40:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:52,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:52,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591281774] [2022-04-06 13:40:52,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591281774] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:52,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:52,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:52,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251220183] [2022-04-06 13:40:52,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:52,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:52,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:52,866 INFO L87 Difference]: Start difference. First operand 7177 states and 10567 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:53,008 INFO L93 Difference]: Finished difference Result 16653 states and 24649 transitions. [2022-04-06 13:40:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:53,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 13:40:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:53,021 INFO L225 Difference]: With dead ends: 16653 [2022-04-06 13:40:53,021 INFO L226 Difference]: Without dead ends: 9611 [2022-04-06 13:40:53,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:53,033 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:53,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 133 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9611 states. [2022-04-06 13:40:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9611 to 9609. [2022-04-06 13:40:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9609 states, 9605 states have (on average 1.4663196251952109) internal successors, (14084), 9605 states have internal predecessors, (14084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9609 states to 9609 states and 14087 transitions. [2022-04-06 13:40:53,193 INFO L78 Accepts]: Start accepts. Automaton has 9609 states and 14087 transitions. Word has length 31 [2022-04-06 13:40:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:53,193 INFO L478 AbstractCegarLoop]: Abstraction has 9609 states and 14087 transitions. [2022-04-06 13:40:53,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 9609 states and 14087 transitions. [2022-04-06 13:40:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 13:40:53,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:53,200 INFO L499 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] [2022-04-06 13:40:53,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-04-06 13:40:53,200 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash 944699137, now seen corresponding path program 1 times [2022-04-06 13:40:53,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:53,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649409576] [2022-04-06 13:40:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:53,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:53,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:53,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:53,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649409576] [2022-04-06 13:40:53,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649409576] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:53,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:53,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:53,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776655496] [2022-04-06 13:40:53,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:53,222 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:53,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:53,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:53,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:53,223 INFO L87 Difference]: Start difference. First operand 9609 states and 14087 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:53,400 INFO L93 Difference]: Finished difference Result 14413 states and 21065 transitions. [2022-04-06 13:40:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:53,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 13:40:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:53,411 INFO L225 Difference]: With dead ends: 14413 [2022-04-06 13:40:53,411 INFO L226 Difference]: Without dead ends: 9739 [2022-04-06 13:40:53,418 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:53,419 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:53,419 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 122 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9739 states. [2022-04-06 13:40:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9739 to 9737. [2022-04-06 13:40:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9737 states, 9733 states have (on average 1.4470358573923765) internal successors, (14084), 9733 states have internal predecessors, (14084), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9737 states to 9737 states and 14087 transitions. [2022-04-06 13:40:53,586 INFO L78 Accepts]: Start accepts. Automaton has 9737 states and 14087 transitions. Word has length 32 [2022-04-06 13:40:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:53,586 INFO L478 AbstractCegarLoop]: Abstraction has 9737 states and 14087 transitions. [2022-04-06 13:40:53,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 9737 states and 14087 transitions. [2022-04-06 13:40:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 13:40:53,594 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:53,595 INFO L499 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] [2022-04-06 13:40:53,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-04-06 13:40:53,595 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:53,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1996958462, now seen corresponding path program 1 times [2022-04-06 13:40:53,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:53,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751076999] [2022-04-06 13:40:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:53,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:53,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:53,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:53,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751076999] [2022-04-06 13:40:53,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751076999] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:53,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:53,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:53,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824297716] [2022-04-06 13:40:53,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:53,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:53,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:53,623 INFO L87 Difference]: Start difference. First operand 9737 states and 14087 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:53,812 INFO L93 Difference]: Finished difference Result 16909 states and 24969 transitions. [2022-04-06 13:40:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 13:40:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:53,842 INFO L225 Difference]: With dead ends: 16909 [2022-04-06 13:40:53,842 INFO L226 Difference]: Without dead ends: 16907 [2022-04-06 13:40:53,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:53,851 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 163 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:53,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16907 states. [2022-04-06 13:40:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16907 to 14345. [2022-04-06 13:40:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14345 states, 14341 states have (on average 1.4015759012621156) internal successors, (20100), 14341 states have internal predecessors, (20100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14345 states to 14345 states and 20103 transitions. [2022-04-06 13:40:54,155 INFO L78 Accepts]: Start accepts. Automaton has 14345 states and 20103 transitions. Word has length 32 [2022-04-06 13:40:54,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:54,155 INFO L478 AbstractCegarLoop]: Abstraction has 14345 states and 20103 transitions. [2022-04-06 13:40:54,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:54,155 INFO L276 IsEmpty]: Start isEmpty. Operand 14345 states and 20103 transitions. [2022-04-06 13:40:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 13:40:54,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:54,170 INFO L499 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] [2022-04-06 13:40:54,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-04-06 13:40:54,170 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1787474657, now seen corresponding path program 1 times [2022-04-06 13:40:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:54,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523176019] [2022-04-06 13:40:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:54,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:54,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523176019] [2022-04-06 13:40:54,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523176019] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:54,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:54,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:54,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618087528] [2022-04-06 13:40:54,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:54,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:54,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:54,194 INFO L87 Difference]: Start difference. First operand 14345 states and 20103 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:54,464 INFO L93 Difference]: Finished difference Result 33037 states and 46473 transitions. [2022-04-06 13:40:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:54,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 13:40:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:54,489 INFO L225 Difference]: With dead ends: 33037 [2022-04-06 13:40:54,489 INFO L226 Difference]: Without dead ends: 18955 [2022-04-06 13:40:54,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:54,510 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 145 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:54,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 135 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18955 states. [2022-04-06 13:40:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18955 to 18953. [2022-04-06 13:40:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18953 states, 18949 states have (on average 1.3917357116470526) internal successors, (26372), 18949 states have internal predecessors, (26372), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18953 states to 18953 states and 26375 transitions. [2022-04-06 13:40:54,857 INFO L78 Accepts]: Start accepts. Automaton has 18953 states and 26375 transitions. Word has length 32 [2022-04-06 13:40:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:54,858 INFO L478 AbstractCegarLoop]: Abstraction has 18953 states and 26375 transitions. [2022-04-06 13:40:54,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 18953 states and 26375 transitions. [2022-04-06 13:40:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 13:40:54,871 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:54,871 INFO L499 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] [2022-04-06 13:40:54,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-04-06 13:40:54,871 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1776137112, now seen corresponding path program 1 times [2022-04-06 13:40:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:54,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827917092] [2022-04-06 13:40:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:54,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:54,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:54,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827917092] [2022-04-06 13:40:54,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827917092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:54,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:54,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:54,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285057830] [2022-04-06 13:40:54,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:54,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:54,900 INFO L87 Difference]: Start difference. First operand 18953 states and 26375 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:55,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:55,155 INFO L93 Difference]: Finished difference Result 28429 states and 39433 transitions. [2022-04-06 13:40:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:55,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 13:40:55,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:55,181 INFO L225 Difference]: With dead ends: 28429 [2022-04-06 13:40:55,181 INFO L226 Difference]: Without dead ends: 19211 [2022-04-06 13:40:55,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:55,191 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 162 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:55,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19211 states. [2022-04-06 13:40:55,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19211 to 19209. [2022-04-06 13:40:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19209 states, 19205 states have (on average 1.37318406664931) internal successors, (26372), 19205 states have internal predecessors, (26372), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19209 states to 19209 states and 26375 transitions. [2022-04-06 13:40:55,467 INFO L78 Accepts]: Start accepts. Automaton has 19209 states and 26375 transitions. Word has length 33 [2022-04-06 13:40:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:55,467 INFO L478 AbstractCegarLoop]: Abstraction has 19209 states and 26375 transitions. [2022-04-06 13:40:55,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19209 states and 26375 transitions. [2022-04-06 13:40:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 13:40:55,486 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:55,486 INFO L499 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] [2022-04-06 13:40:55,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-04-06 13:40:55,487 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash -422827415, now seen corresponding path program 1 times [2022-04-06 13:40:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345020819] [2022-04-06 13:40:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:55,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:55,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345020819] [2022-04-06 13:40:55,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345020819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:55,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:55,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:55,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808113730] [2022-04-06 13:40:55,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:55,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:55,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:55,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:55,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:55,515 INFO L87 Difference]: Start difference. First operand 19209 states and 26375 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:55,815 INFO L93 Difference]: Finished difference Result 32781 states and 45833 transitions. [2022-04-06 13:40:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 13:40:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:55,858 INFO L225 Difference]: With dead ends: 32781 [2022-04-06 13:40:55,858 INFO L226 Difference]: Without dead ends: 32779 [2022-04-06 13:40:55,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:55,863 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:55,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32779 states. [2022-04-06 13:40:56,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32779 to 28681. [2022-04-06 13:40:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28681 states, 28677 states have (on average 1.3302646720368239) internal successors, (38148), 28677 states have internal predecessors, (38148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28681 states to 28681 states and 38151 transitions. [2022-04-06 13:40:56,221 INFO L78 Accepts]: Start accepts. Automaton has 28681 states and 38151 transitions. Word has length 33 [2022-04-06 13:40:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:56,222 INFO L478 AbstractCegarLoop]: Abstraction has 28681 states and 38151 transitions. [2022-04-06 13:40:56,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 28681 states and 38151 transitions. [2022-04-06 13:40:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 13:40:56,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:56,303 INFO L499 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] [2022-04-06 13:40:56,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-04-06 13:40:56,303 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -933361592, now seen corresponding path program 1 times [2022-04-06 13:40:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:56,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964397087] [2022-04-06 13:40:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:56,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:56,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:56,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:56,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964397087] [2022-04-06 13:40:56,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964397087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:56,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:56,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:56,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460781478] [2022-04-06 13:40:56,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:56,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:56,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:56,320 INFO L87 Difference]: Start difference. First operand 28681 states and 38151 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:56,633 INFO L93 Difference]: Finished difference Result 65549 states and 87305 transitions. [2022-04-06 13:40:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 13:40:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:56,679 INFO L225 Difference]: With dead ends: 65549 [2022-04-06 13:40:56,679 INFO L226 Difference]: Without dead ends: 37387 [2022-04-06 13:40:56,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:56,717 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:56,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 137 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37387 states. [2022-04-06 13:40:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37387 to 37385. [2022-04-06 13:40:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37381 states have (on average 1.3149995987266259) internal successors, (49156), 37381 states have internal predecessors, (49156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 49159 transitions. [2022-04-06 13:40:57,444 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 49159 transitions. Word has length 33 [2022-04-06 13:40:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:57,444 INFO L478 AbstractCegarLoop]: Abstraction has 37385 states and 49159 transitions. [2022-04-06 13:40:57,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 49159 transitions. [2022-04-06 13:40:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 13:40:57,461 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:57,461 INFO L499 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] [2022-04-06 13:40:57,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-04-06 13:40:57,461 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:57,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:57,462 INFO L85 PathProgramCache]: Analyzing trace with hash -222714787, now seen corresponding path program 1 times [2022-04-06 13:40:57,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:57,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125803464] [2022-04-06 13:40:57,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:57,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:57,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:57,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:57,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125803464] [2022-04-06 13:40:57,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125803464] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:57,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:57,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:57,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667909331] [2022-04-06 13:40:57,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:57,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:57,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:57,481 INFO L87 Difference]: Start difference. First operand 37385 states and 49159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:57,839 INFO L93 Difference]: Finished difference Result 56077 states and 73481 transitions. [2022-04-06 13:40:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 13:40:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:57,883 INFO L225 Difference]: With dead ends: 56077 [2022-04-06 13:40:57,884 INFO L226 Difference]: Without dead ends: 37899 [2022-04-06 13:40:57,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:57,911 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 161 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:57,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 116 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:40:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37899 states. [2022-04-06 13:40:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37899 to 37897. [2022-04-06 13:40:58,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37897 states, 37893 states have (on average 1.2972316786741616) internal successors, (49156), 37893 states have internal predecessors, (49156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37897 states to 37897 states and 49159 transitions. [2022-04-06 13:40:58,737 INFO L78 Accepts]: Start accepts. Automaton has 37897 states and 49159 transitions. Word has length 34 [2022-04-06 13:40:58,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:40:58,737 INFO L478 AbstractCegarLoop]: Abstraction has 37897 states and 49159 transitions. [2022-04-06 13:40:58,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 37897 states and 49159 transitions. [2022-04-06 13:40:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 13:40:58,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:40:58,753 INFO L499 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] [2022-04-06 13:40:58,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-04-06 13:40:58,753 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:40:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:40:58,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1130594910, now seen corresponding path program 1 times [2022-04-06 13:40:58,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:40:58,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128658229] [2022-04-06 13:40:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:40:58,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:40:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:58,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:40:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:40:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:40:58,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:40:58,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128658229] [2022-04-06 13:40:58,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128658229] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:40:58,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:40:58,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:40:58,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479776792] [2022-04-06 13:40:58,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:40:58,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:40:58,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:40:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:40:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:40:58,773 INFO L87 Difference]: Start difference. First operand 37897 states and 49159 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:40:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:40:59,411 INFO L93 Difference]: Finished difference Result 110605 states and 141321 transitions. [2022-04-06 13:40:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:40:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 13:40:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:40:59,602 INFO L225 Difference]: With dead ends: 110605 [2022-04-06 13:40:59,602 INFO L226 Difference]: Without dead ends: 73739 [2022-04-06 13:40:59,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:40:59,628 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 169 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:40:59,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 106 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:40:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73739 states. [2022-04-06 13:41:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73739 to 73737. [2022-04-06 13:41:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73737 states, 73733 states have (on average 1.2499694844913403) internal successors, (92164), 73733 states have internal predecessors, (92164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73737 states to 73737 states and 92167 transitions. [2022-04-06 13:41:00,846 INFO L78 Accepts]: Start accepts. Automaton has 73737 states and 92167 transitions. Word has length 34 [2022-04-06 13:41:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:41:00,846 INFO L478 AbstractCegarLoop]: Abstraction has 73737 states and 92167 transitions. [2022-04-06 13:41:00,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 73737 states and 92167 transitions. [2022-04-06 13:41:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 13:41:00,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:41:00,878 INFO L499 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] [2022-04-06 13:41:00,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-04-06 13:41:00,878 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:41:00,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:41:00,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1641129087, now seen corresponding path program 1 times [2022-04-06 13:41:00,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:41:00,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704842497] [2022-04-06 13:41:00,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:41:00,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:41:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:00,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:41:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:41:00,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:41:00,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704842497] [2022-04-06 13:41:00,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704842497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:41:00,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:41:00,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:41:00,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543830416] [2022-04-06 13:41:00,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:41:00,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:41:00,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:41:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:41:00,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:41:00,898 INFO L87 Difference]: Start difference. First operand 73737 states and 92167 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:41:01,693 INFO L93 Difference]: Finished difference Result 79885 states and 102409 transitions. [2022-04-06 13:41:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:41:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 13:41:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:41:01,777 INFO L225 Difference]: With dead ends: 79885 [2022-04-06 13:41:01,777 INFO L226 Difference]: Without dead ends: 79883 [2022-04-06 13:41:01,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:41:01,793 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 103 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 13:41:01,793 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 128 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 13:41:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-04-06 13:41:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 73737. [2022-04-06 13:41:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73737 states, 73733 states have (on average 1.2360815374391385) internal successors, (91140), 73733 states have internal predecessors, (91140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73737 states to 73737 states and 91143 transitions. [2022-04-06 13:41:03,010 INFO L78 Accepts]: Start accepts. Automaton has 73737 states and 91143 transitions. Word has length 34 [2022-04-06 13:41:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:41:03,010 INFO L478 AbstractCegarLoop]: Abstraction has 73737 states and 91143 transitions. [2022-04-06 13:41:03,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 73737 states and 91143 transitions. [2022-04-06 13:41:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 13:41:03,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:41:03,040 INFO L499 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] [2022-04-06 13:41:03,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-04-06 13:41:03,041 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:41:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:41:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash 688737156, now seen corresponding path program 1 times [2022-04-06 13:41:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:41:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006171290] [2022-04-06 13:41:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:41:03,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:41:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:03,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:41:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:41:03,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:41:03,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006171290] [2022-04-06 13:41:03,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006171290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:41:03,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:41:03,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:41:03,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388329437] [2022-04-06 13:41:03,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:41:03,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:41:03,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:41:03,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:41:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:41:03,062 INFO L87 Difference]: Start difference. First operand 73737 states and 91143 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:41:04,298 INFO L93 Difference]: Finished difference Result 121869 states and 151561 transitions. [2022-04-06 13:41:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:41:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 13:41:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:41:04,432 INFO L225 Difference]: With dead ends: 121869 [2022-04-06 13:41:04,432 INFO L226 Difference]: Without dead ends: 121867 [2022-04-06 13:41:04,453 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:41:04,454 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 13:41:04,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 13:41:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121867 states. [2022-04-06 13:41:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121867 to 113673. [2022-04-06 13:41:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113673 states, 113669 states have (on average 1.2071892952344088) internal successors, (137220), 113669 states have internal predecessors, (137220), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113673 states to 113673 states and 137223 transitions. [2022-04-06 13:41:06,302 INFO L78 Accepts]: Start accepts. Automaton has 113673 states and 137223 transitions. Word has length 35 [2022-04-06 13:41:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:41:06,303 INFO L478 AbstractCegarLoop]: Abstraction has 113673 states and 137223 transitions. [2022-04-06 13:41:06,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 113673 states and 137223 transitions. [2022-04-06 13:41:06,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 13:41:06,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:41:06,357 INFO L499 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] [2022-04-06 13:41:06,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-04-06 13:41:06,357 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:41:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:41:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash 178202979, now seen corresponding path program 1 times [2022-04-06 13:41:06,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:41:06,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065391221] [2022-04-06 13:41:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:41:06,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:41:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:06,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:41:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:41:06,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:41:06,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065391221] [2022-04-06 13:41:06,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065391221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:41:06,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:41:06,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:41:06,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033609426] [2022-04-06 13:41:06,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:41:06,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:41:06,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:41:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:41:06,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:41:06,381 INFO L87 Difference]: Start difference. First operand 113673 states and 137223 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:07,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:41:07,845 INFO L93 Difference]: Finished difference Result 257037 states and 309257 transitions. [2022-04-06 13:41:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:41:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 13:41:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:41:08,015 INFO L225 Difference]: With dead ends: 257037 [2022-04-06 13:41:08,015 INFO L226 Difference]: Without dead ends: 144395 [2022-04-06 13:41:08,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:41:08,127 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:41:08,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 141 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:41:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144395 states. [2022-04-06 13:41:10,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144395 to 144393. [2022-04-06 13:41:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144393 states, 144389 states have (on average 1.1772918989673729) internal successors, (169988), 144389 states have internal predecessors, (169988), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144393 states to 144393 states and 169991 transitions. [2022-04-06 13:41:10,657 INFO L78 Accepts]: Start accepts. Automaton has 144393 states and 169991 transitions. Word has length 35 [2022-04-06 13:41:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:41:10,658 INFO L478 AbstractCegarLoop]: Abstraction has 144393 states and 169991 transitions. [2022-04-06 13:41:10,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 144393 states and 169991 transitions. [2022-04-06 13:41:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 13:41:10,734 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:41:10,734 INFO L499 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] [2022-04-06 13:41:10,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-04-06 13:41:10,735 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:41:10,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:41:10,735 INFO L85 PathProgramCache]: Analyzing trace with hash -123951206, now seen corresponding path program 1 times [2022-04-06 13:41:10,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:41:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491250140] [2022-04-06 13:41:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:41:10,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:41:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:10,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:41:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:41:10,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:41:10,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491250140] [2022-04-06 13:41:10,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491250140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:41:10,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:41:10,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:41:10,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754847018] [2022-04-06 13:41:10,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:41:10,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:41:10,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:41:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:41:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:41:10,760 INFO L87 Difference]: Start difference. First operand 144393 states and 169991 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:41:12,220 INFO L93 Difference]: Finished difference Result 218125 states and 257033 transitions. [2022-04-06 13:41:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:41:12,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 13:41:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:41:12,392 INFO L225 Difference]: With dead ends: 218125 [2022-04-06 13:41:12,392 INFO L226 Difference]: Without dead ends: 147467 [2022-04-06 13:41:12,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:41:12,476 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:41:12,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 110 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:41:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147467 states. [2022-04-06 13:41:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147467 to 147465. [2022-04-06 13:41:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147465 states, 147461 states have (on average 1.1666542340008546) internal successors, (172036), 147461 states have internal predecessors, (172036), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147465 states to 147465 states and 172039 transitions. [2022-04-06 13:41:15,065 INFO L78 Accepts]: Start accepts. Automaton has 147465 states and 172039 transitions. Word has length 36 [2022-04-06 13:41:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:41:15,065 INFO L478 AbstractCegarLoop]: Abstraction has 147465 states and 172039 transitions. [2022-04-06 13:41:15,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 147465 states and 172039 transitions. [2022-04-06 13:41:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 13:41:15,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:41:15,143 INFO L499 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] [2022-04-06 13:41:15,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-04-06 13:41:15,144 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:41:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:41:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1229358491, now seen corresponding path program 1 times [2022-04-06 13:41:15,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:41:15,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570420385] [2022-04-06 13:41:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:41:15,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:41:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:15,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:41:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:41:15,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:41:15,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570420385] [2022-04-06 13:41:15,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570420385] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:41:15,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:41:15,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:41:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819486080] [2022-04-06 13:41:15,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:41:15,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:41:15,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:41:15,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:41:15,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:41:15,163 INFO L87 Difference]: Start difference. First operand 147465 states and 172039 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:41:17,333 INFO L93 Difference]: Finished difference Result 237579 states and 274440 transitions. [2022-04-06 13:41:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:41:17,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 13:41:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:41:17,618 INFO L225 Difference]: With dead ends: 237579 [2022-04-06 13:41:17,618 INFO L226 Difference]: Without dead ends: 237577 [2022-04-06 13:41:17,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:41:17,665 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 134 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:41:17,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 83 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:41:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237577 states. [2022-04-06 13:41:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237577 to 229385. [2022-04-06 13:41:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229385 states, 229381 states have (on average 1.1428496693274508) internal successors, (262148), 229381 states have internal predecessors, (262148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229385 states to 229385 states and 262151 transitions. [2022-04-06 13:41:21,274 INFO L78 Accepts]: Start accepts. Automaton has 229385 states and 262151 transitions. Word has length 36 [2022-04-06 13:41:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:41:21,274 INFO L478 AbstractCegarLoop]: Abstraction has 229385 states and 262151 transitions. [2022-04-06 13:41:21,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 229385 states and 262151 transitions. [2022-04-06 13:41:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 13:41:21,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 13:41:21,678 INFO L499 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] [2022-04-06 13:41:21,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-04-06 13:41:21,678 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 13:41:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 13:41:21,678 INFO L85 PathProgramCache]: Analyzing trace with hash 718824314, now seen corresponding path program 1 times [2022-04-06 13:41:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 13:41:21,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741728683] [2022-04-06 13:41:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 13:41:21,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 13:41:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:21,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 13:41:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 13:41:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 13:41:21,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 13:41:21,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741728683] [2022-04-06 13:41:21,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741728683] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 13:41:21,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 13:41:21,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 13:41:21,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761872226] [2022-04-06 13:41:21,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 13:41:21,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 13:41:21,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 13:41:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 13:41:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 13:41:21,707 INFO L87 Difference]: Start difference. First operand 229385 states and 262151 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 13:41:24,492 INFO L93 Difference]: Finished difference Result 512009 states and 577543 transitions. [2022-04-06 13:41:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 13:41:24,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-06 13:41:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 13:41:24,492 INFO L225 Difference]: With dead ends: 512009 [2022-04-06 13:41:24,492 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 13:41:25,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 13:41:25,013 INFO L913 BasicCegarLoop]: 135 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 13:41:25,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 142 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 13:41:25,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 13:41:25,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 13:41:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 13:41:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 13:41:25,015 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-04-06 13:41:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 13:41:25,015 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 13:41:25,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 13:41:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 13:41:25,016 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 13:41:25,018 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 13:41:25,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-04-06 13:41:25,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.