/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 08:36:37,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 08:36:37,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 08:36:37,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 08:36:37,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 08:36:37,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 08:36:37,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 08:36:37,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 08:36:37,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 08:36:37,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 08:36:37,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 08:36:37,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 08:36:37,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 08:36:37,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 08:36:37,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 08:36:37,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 08:36:37,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 08:36:37,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 08:36:37,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 08:36:37,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 08:36:37,230 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 08:36:37,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 08:36:37,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 08:36:37,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 08:36:37,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 08:36:37,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 08:36:37,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 08:36:37,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 08:36:37,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 08:36:37,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 08:36:37,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 08:36:37,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 08:36:37,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 08:36:37,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 08:36:37,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 08:36:37,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 08:36:37,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 08:36:37,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 08:36:37,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 08:36:37,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 08:36:37,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 08:36:37,252 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 08:36:37,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 08:36:37,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 08:36:37,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 08:36:37,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 08:36:37,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 08:36:37,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 08:36:37,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:36:37,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 08:36:37,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 08:36:37,254 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 08:36:37,254 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 08:36:37,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 08:36:37,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 08:36:37,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 08:36:37,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 08:36:37,469 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 08:36:37,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c [2022-04-06 08:36:37,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824d69fa9/5ac334c9da9b41b59cbfaafa35896a04/FLAG930d706bc [2022-04-06 08:36:37,801 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 08:36:37,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c [2022-04-06 08:36:37,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824d69fa9/5ac334c9da9b41b59cbfaafa35896a04/FLAG930d706bc [2022-04-06 08:36:38,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824d69fa9/5ac334c9da9b41b59cbfaafa35896a04 [2022-04-06 08:36:38,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 08:36:38,229 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 08:36:38,243 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 08:36:38,243 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 08:36:38,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 08:36:38,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a51a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38, skipping insertion in model container [2022-04-06 08:36:38,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 08:36:38,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 08:36:38,420 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c[43387,43400] [2022-04-06 08:36:38,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:36:38,427 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 08:36:38,476 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c[43387,43400] [2022-04-06 08:36:38,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:36:38,487 INFO L208 MainTranslator]: Completed translation [2022-04-06 08:36:38,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38 WrapperNode [2022-04-06 08:36:38,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 08:36:38,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 08:36:38,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 08:36:38,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 08:36:38,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 08:36:38,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 08:36:38,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 08:36:38,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 08:36:38,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (1/1) ... [2022-04-06 08:36:38,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:36:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:36:38,585 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 08:36:38,606 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 08:36:38,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 08:36:38,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 08:36:38,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 08:36:38,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2022-04-06 08:36:38,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR [2022-04-06 08:36:38,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 08:36:38,624 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 08:36:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 08:36:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 08:36:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 08:36:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 08:36:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 08:36:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-04-06 08:36:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure ERR [2022-04-06 08:36:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2022-04-06 08:36:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 08:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 08:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 08:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 08:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 08:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 08:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 08:36:38,740 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 08:36:38,742 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 08:36:38,832 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-04-06 08:36:39,089 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-04-06 08:36:39,090 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-04-06 08:36:39,095 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 08:36:39,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 08:36:39,101 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 08:36:39,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:36:39 BoogieIcfgContainer [2022-04-06 08:36:39,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 08:36:39,104 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 08:36:39,104 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 08:36:39,105 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 08:36:39,106 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:36:39" (1/1) ... [2022-04-06 08:36:39,108 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 08:36:39,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:36:39 BasicIcfg [2022-04-06 08:36:39,135 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 08:36:39,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 08:36:39,137 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 08:36:39,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 08:36:39,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:36:38" (1/4) ... [2022-04-06 08:36:39,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dd1bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:36:39, skipping insertion in model container [2022-04-06 08:36:39,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:36:38" (2/4) ... [2022-04-06 08:36:39,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dd1bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:36:39, skipping insertion in model container [2022-04-06 08:36:39,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:36:39" (3/4) ... [2022-04-06 08:36:39,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dd1bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:36:39, skipping insertion in model container [2022-04-06 08:36:39,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:36:39" (4/4) ... [2022-04-06 08:36:39,142 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1.cil-2.cJordan [2022-04-06 08:36:39,145 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 08:36:39,146 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 08:36:39,183 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 08:36:39,188 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 08:36:39,188 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 08:36:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 145 states have (on average 1.696551724137931) internal successors, (246), 147 states have internal predecessors, (246), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 08:36:39,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 08:36:39,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:39,215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:39,216 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:39,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash 270340497, now seen corresponding path program 1 times [2022-04-06 08:36:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:39,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366200078] [2022-04-06 08:36:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:39,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:39,502 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 08:36:39,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366200078] [2022-04-06 08:36:39,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366200078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:39,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:39,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:39,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592477582] [2022-04-06 08:36:39,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:39,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:39,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:39,535 INFO L87 Difference]: Start difference. First operand has 155 states, 145 states have (on average 1.696551724137931) internal successors, (246), 147 states have internal predecessors, (246), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:39,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:39,839 INFO L93 Difference]: Finished difference Result 283 states and 465 transitions. [2022-04-06 08:36:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:39,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 08:36:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:39,857 INFO L225 Difference]: With dead ends: 283 [2022-04-06 08:36:39,858 INFO L226 Difference]: Without dead ends: 256 [2022-04-06 08:36:39,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:36:39,862 INFO L913 BasicCegarLoop]: 242 mSDtfsCounter, 637 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:39,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 251 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-04-06 08:36:39,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-04-06 08:36:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.52) internal successors, (380), 250 states have internal predecessors, (380), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 385 transitions. [2022-04-06 08:36:39,909 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 385 transitions. Word has length 52 [2022-04-06 08:36:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:39,909 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 385 transitions. [2022-04-06 08:36:39,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 385 transitions. [2022-04-06 08:36:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 08:36:39,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:39,912 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:39,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 08:36:39,913 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1820054526, now seen corresponding path program 1 times [2022-04-06 08:36:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:39,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301730122] [2022-04-06 08:36:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:39,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:36:39,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:39,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301730122] [2022-04-06 08:36:39,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301730122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:39,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:39,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:39,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580088087] [2022-04-06 08:36:39,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:39,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:39,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:39,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:39,999 INFO L87 Difference]: Start difference. First operand 256 states and 385 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:40,226 INFO L93 Difference]: Finished difference Result 285 states and 422 transitions. [2022-04-06 08:36:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:40,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 08:36:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:40,233 INFO L225 Difference]: With dead ends: 285 [2022-04-06 08:36:40,233 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 08:36:40,233 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 08:36:40,236 INFO L913 BasicCegarLoop]: 217 mSDtfsCounter, 218 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:40,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 224 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 08:36:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 277. [2022-04-06 08:36:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 271 states have (on average 1.4981549815498154) internal successors, (406), 271 states have internal predecessors, (406), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 411 transitions. [2022-04-06 08:36:40,255 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 411 transitions. Word has length 68 [2022-04-06 08:36:40,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:40,255 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 411 transitions. [2022-04-06 08:36:40,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,256 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 411 transitions. [2022-04-06 08:36:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 08:36:40,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:40,258 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:40,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 08:36:40,259 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1118947656, now seen corresponding path program 1 times [2022-04-06 08:36:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:40,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702194563] [2022-04-06 08:36:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 08:36:40,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:40,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702194563] [2022-04-06 08:36:40,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702194563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:40,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:40,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747703162] [2022-04-06 08:36:40,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:40,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:40,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:40,341 INFO L87 Difference]: Start difference. First operand 277 states and 411 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:40,559 INFO L93 Difference]: Finished difference Result 369 states and 514 transitions. [2022-04-06 08:36:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:40,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 08:36:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:40,563 INFO L225 Difference]: With dead ends: 369 [2022-04-06 08:36:40,563 INFO L226 Difference]: Without dead ends: 369 [2022-04-06 08:36:40,564 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 08:36:40,567 INFO L913 BasicCegarLoop]: 218 mSDtfsCounter, 219 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:40,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 225 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-04-06 08:36:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 361. [2022-04-06 08:36:40,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 355 states have (on average 1.408450704225352) internal successors, (500), 355 states have internal predecessors, (500), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 505 transitions. [2022-04-06 08:36:40,576 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 505 transitions. Word has length 89 [2022-04-06 08:36:40,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:40,576 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 505 transitions. [2022-04-06 08:36:40,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 505 transitions. [2022-04-06 08:36:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 08:36:40,578 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:40,579 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:40,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 08:36:40,579 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2143641577, now seen corresponding path program 1 times [2022-04-06 08:36:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:40,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009928325] [2022-04-06 08:36:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:40,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 08:36:40,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:40,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009928325] [2022-04-06 08:36:40,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009928325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:40,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:40,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:40,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122691387] [2022-04-06 08:36:40,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:40,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:40,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:40,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:40,646 INFO L87 Difference]: Start difference. First operand 361 states and 505 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:40,830 INFO L93 Difference]: Finished difference Result 415 states and 571 transitions. [2022-04-06 08:36:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 08:36:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:40,832 INFO L225 Difference]: With dead ends: 415 [2022-04-06 08:36:40,832 INFO L226 Difference]: Without dead ends: 415 [2022-04-06 08:36:40,832 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 08:36:40,833 INFO L913 BasicCegarLoop]: 218 mSDtfsCounter, 217 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:40,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 225 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-04-06 08:36:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 407. [2022-04-06 08:36:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 401 states have (on average 1.3865336658354115) internal successors, (556), 401 states have internal predecessors, (556), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 561 transitions. [2022-04-06 08:36:40,840 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 561 transitions. Word has length 89 [2022-04-06 08:36:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:40,840 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 561 transitions. [2022-04-06 08:36:40,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 561 transitions. [2022-04-06 08:36:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 08:36:40,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:40,843 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:40,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 08:36:40,843 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:40,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:40,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1568616926, now seen corresponding path program 1 times [2022-04-06 08:36:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878108562] [2022-04-06 08:36:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:40,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:40,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 08:36:40,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:40,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878108562] [2022-04-06 08:36:40,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878108562] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:40,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:40,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587610980] [2022-04-06 08:36:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:40,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:40,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:40,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:40,904 INFO L87 Difference]: Start difference. First operand 407 states and 561 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:41,084 INFO L93 Difference]: Finished difference Result 483 states and 663 transitions. [2022-04-06 08:36:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:41,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-04-06 08:36:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:41,086 INFO L225 Difference]: With dead ends: 483 [2022-04-06 08:36:41,086 INFO L226 Difference]: Without dead ends: 483 [2022-04-06 08:36:41,086 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 08:36:41,087 INFO L913 BasicCegarLoop]: 217 mSDtfsCounter, 249 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:41,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 224 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-04-06 08:36:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 457. [2022-04-06 08:36:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 451 states have (on average 1.3658536585365855) internal successors, (616), 451 states have internal predecessors, (616), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 621 transitions. [2022-04-06 08:36:41,094 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 621 transitions. Word has length 110 [2022-04-06 08:36:41,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:41,094 INFO L478 AbstractCegarLoop]: Abstraction has 457 states and 621 transitions. [2022-04-06 08:36:41,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 621 transitions. [2022-04-06 08:36:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 08:36:41,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:41,096 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:41,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 08:36:41,096 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash 710803079, now seen corresponding path program 1 times [2022-04-06 08:36:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:41,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001959014] [2022-04-06 08:36:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:41,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:41,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 08:36:41,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001959014] [2022-04-06 08:36:41,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001959014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:41,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:41,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141922206] [2022-04-06 08:36:41,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:41,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:41,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:41,153 INFO L87 Difference]: Start difference. First operand 457 states and 621 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:41,318 INFO L93 Difference]: Finished difference Result 684 states and 927 transitions. [2022-04-06 08:36:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-04-06 08:36:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:41,320 INFO L225 Difference]: With dead ends: 684 [2022-04-06 08:36:41,320 INFO L226 Difference]: Without dead ends: 684 [2022-04-06 08:36:41,320 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 08:36:41,321 INFO L913 BasicCegarLoop]: 374 mSDtfsCounter, 334 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:41,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 381 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:36:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-04-06 08:36:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-04-06 08:36:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 678 states have (on average 1.359882005899705) internal successors, (922), 678 states have internal predecessors, (922), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 927 transitions. [2022-04-06 08:36:41,341 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 927 transitions. Word has length 129 [2022-04-06 08:36:41,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:41,341 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 927 transitions. [2022-04-06 08:36:41,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,341 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 927 transitions. [2022-04-06 08:36:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 08:36:41,343 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:41,343 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:41,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 08:36:41,344 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:41,345 INFO L85 PathProgramCache]: Analyzing trace with hash -989937400, now seen corresponding path program 1 times [2022-04-06 08:36:41,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:41,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179620502] [2022-04-06 08:36:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:41,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:41,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 08:36:41,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:41,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179620502] [2022-04-06 08:36:41,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179620502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:41,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:41,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101535566] [2022-04-06 08:36:41,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:41,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:41,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:41,400 INFO L87 Difference]: Start difference. First operand 684 states and 927 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:41,554 INFO L93 Difference]: Finished difference Result 913 states and 1236 transitions. [2022-04-06 08:36:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:41,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-04-06 08:36:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:41,557 INFO L225 Difference]: With dead ends: 913 [2022-04-06 08:36:41,558 INFO L226 Difference]: Without dead ends: 913 [2022-04-06 08:36:41,558 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 08:36:41,560 INFO L913 BasicCegarLoop]: 377 mSDtfsCounter, 336 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:41,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 384 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:36:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-04-06 08:36:41,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-04-06 08:36:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 907 states have (on average 1.3572216097023153) internal successors, (1231), 907 states have internal predecessors, (1231), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1236 transitions. [2022-04-06 08:36:41,573 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1236 transitions. Word has length 129 [2022-04-06 08:36:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:41,573 INFO L478 AbstractCegarLoop]: Abstraction has 913 states and 1236 transitions. [2022-04-06 08:36:41,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1236 transitions. [2022-04-06 08:36:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 08:36:41,575 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:41,575 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:41,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-04-06 08:36:41,576 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:41,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:41,576 INFO L85 PathProgramCache]: Analyzing trace with hash 178258855, now seen corresponding path program 1 times [2022-04-06 08:36:41,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:41,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312176137] [2022-04-06 08:36:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:41,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:41,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 08:36:41,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312176137] [2022-04-06 08:36:41,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312176137] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:41,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:41,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:41,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061679049] [2022-04-06 08:36:41,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:41,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:41,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:41,630 INFO L87 Difference]: Start difference. First operand 913 states and 1236 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:41,783 INFO L93 Difference]: Finished difference Result 937 states and 1265 transitions. [2022-04-06 08:36:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:41,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-04-06 08:36:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:41,786 INFO L225 Difference]: With dead ends: 937 [2022-04-06 08:36:41,786 INFO L226 Difference]: Without dead ends: 937 [2022-04-06 08:36:41,787 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 08:36:41,787 INFO L913 BasicCegarLoop]: 232 mSDtfsCounter, 210 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:41,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 239 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:36:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-04-06 08:36:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 937. [2022-04-06 08:36:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 931 states have (on average 1.3533834586466165) internal successors, (1260), 931 states have internal predecessors, (1260), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1265 transitions. [2022-04-06 08:36:41,798 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1265 transitions. Word has length 129 [2022-04-06 08:36:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:41,798 INFO L478 AbstractCegarLoop]: Abstraction has 937 states and 1265 transitions. [2022-04-06 08:36:41,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1265 transitions. [2022-04-06 08:36:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 08:36:41,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:41,800 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:41,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-04-06 08:36:41,801 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash 123134098, now seen corresponding path program 1 times [2022-04-06 08:36:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:41,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282051283] [2022-04-06 08:36:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:41,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 08:36:41,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:41,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282051283] [2022-04-06 08:36:41,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282051283] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:41,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:41,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256265174] [2022-04-06 08:36:41,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:41,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:41,869 INFO L87 Difference]: Start difference. First operand 937 states and 1265 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:42,068 INFO L93 Difference]: Finished difference Result 1106 states and 1473 transitions. [2022-04-06 08:36:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:42,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 08:36:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:42,072 INFO L225 Difference]: With dead ends: 1106 [2022-04-06 08:36:42,072 INFO L226 Difference]: Without dead ends: 1106 [2022-04-06 08:36:42,072 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 08:36:42,074 INFO L913 BasicCegarLoop]: 215 mSDtfsCounter, 242 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:42,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 222 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-04-06 08:36:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1060. [2022-04-06 08:36:42,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1054 states have (on average 1.3349146110056926) internal successors, (1407), 1054 states have internal predecessors, (1407), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1412 transitions. [2022-04-06 08:36:42,088 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1412 transitions. Word has length 167 [2022-04-06 08:36:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:42,089 INFO L478 AbstractCegarLoop]: Abstraction has 1060 states and 1412 transitions. [2022-04-06 08:36:42,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1412 transitions. [2022-04-06 08:36:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 08:36:42,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:42,091 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:42,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-04-06 08:36:42,092 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash -256620717, now seen corresponding path program 1 times [2022-04-06 08:36:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:42,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082442281] [2022-04-06 08:36:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-06 08:36:42,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:42,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082442281] [2022-04-06 08:36:42,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082442281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:42,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:42,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:42,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969277217] [2022-04-06 08:36:42,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:42,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:42,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:42,136 INFO L87 Difference]: Start difference. First operand 1060 states and 1412 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:42,325 INFO L93 Difference]: Finished difference Result 1289 states and 1778 transitions. [2022-04-06 08:36:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-04-06 08:36:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:42,329 INFO L225 Difference]: With dead ends: 1289 [2022-04-06 08:36:42,329 INFO L226 Difference]: Without dead ends: 1285 [2022-04-06 08:36:42,330 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 08:36:42,330 INFO L913 BasicCegarLoop]: 216 mSDtfsCounter, 338 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:42,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 223 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-04-06 08:36:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1264. [2022-04-06 08:36:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1258 states have (on average 1.3879173290937996) internal successors, (1746), 1258 states have internal predecessors, (1746), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1751 transitions. [2022-04-06 08:36:42,347 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1751 transitions. Word has length 181 [2022-04-06 08:36:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:42,347 INFO L478 AbstractCegarLoop]: Abstraction has 1264 states and 1751 transitions. [2022-04-06 08:36:42,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1751 transitions. [2022-04-06 08:36:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-04-06 08:36:42,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:42,350 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:42,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-04-06 08:36:42,350 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:42,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:42,351 INFO L85 PathProgramCache]: Analyzing trace with hash -863922344, now seen corresponding path program 1 times [2022-04-06 08:36:42,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:42,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351091099] [2022-04-06 08:36:42,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:42,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:42,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-04-06 08:36:42,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:42,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351091099] [2022-04-06 08:36:42,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351091099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:42,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:42,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:42,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506537960] [2022-04-06 08:36:42,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:42,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:42,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:42,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:42,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:42,403 INFO L87 Difference]: Start difference. First operand 1264 states and 1751 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:42,595 INFO L93 Difference]: Finished difference Result 1388 states and 1895 transitions. [2022-04-06 08:36:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:42,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-04-06 08:36:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:42,599 INFO L225 Difference]: With dead ends: 1388 [2022-04-06 08:36:42,599 INFO L226 Difference]: Without dead ends: 1388 [2022-04-06 08:36:42,599 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 08:36:42,600 INFO L913 BasicCegarLoop]: 205 mSDtfsCounter, 224 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:42,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 212 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-04-06 08:36:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1388. [2022-04-06 08:36:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1382 states have (on average 1.3675832127351664) internal successors, (1890), 1382 states have internal predecessors, (1890), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1895 transitions. [2022-04-06 08:36:42,616 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1895 transitions. Word has length 210 [2022-04-06 08:36:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:42,616 INFO L478 AbstractCegarLoop]: Abstraction has 1388 states and 1895 transitions. [2022-04-06 08:36:42,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1895 transitions. [2022-04-06 08:36:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 08:36:42,619 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:42,619 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:42,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-04-06 08:36:42,619 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1363637268, now seen corresponding path program 1 times [2022-04-06 08:36:42,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:42,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304858294] [2022-04-06 08:36:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:42,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:42,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-04-06 08:36:42,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304858294] [2022-04-06 08:36:42,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304858294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:42,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:42,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:42,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067968925] [2022-04-06 08:36:42,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:42,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:42,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:42,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:42,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:42,659 INFO L87 Difference]: Start difference. First operand 1388 states and 1895 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:42,860 INFO L93 Difference]: Finished difference Result 1556 states and 2079 transitions. [2022-04-06 08:36:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:42,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-04-06 08:36:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:42,864 INFO L225 Difference]: With dead ends: 1556 [2022-04-06 08:36:42,864 INFO L226 Difference]: Without dead ends: 1381 [2022-04-06 08:36:42,864 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 08:36:42,865 INFO L913 BasicCegarLoop]: 217 mSDtfsCounter, 209 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:42,865 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 224 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-04-06 08:36:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1381. [2022-04-06 08:36:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1375 states have (on average 1.3614545454545455) internal successors, (1872), 1375 states have internal predecessors, (1872), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1877 transitions. [2022-04-06 08:36:42,882 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1877 transitions. Word has length 239 [2022-04-06 08:36:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:42,882 INFO L478 AbstractCegarLoop]: Abstraction has 1381 states and 1877 transitions. [2022-04-06 08:36:42,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1877 transitions. [2022-04-06 08:36:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-04-06 08:36:42,885 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:42,885 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:42,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 08:36:42,885 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:42,886 INFO L85 PathProgramCache]: Analyzing trace with hash 667275459, now seen corresponding path program 1 times [2022-04-06 08:36:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:42,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015726722] [2022-04-06 08:36:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:42,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 08:36:42,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:42,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015726722] [2022-04-06 08:36:42,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015726722] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:42,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:42,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:42,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658249598] [2022-04-06 08:36:42,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:42,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:42,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:42,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:42,949 INFO L87 Difference]: Start difference. First operand 1381 states and 1877 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:43,105 INFO L93 Difference]: Finished difference Result 2603 states and 3556 transitions. [2022-04-06 08:36:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:43,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-04-06 08:36:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:43,109 INFO L225 Difference]: With dead ends: 2603 [2022-04-06 08:36:43,110 INFO L226 Difference]: Without dead ends: 1661 [2022-04-06 08:36:43,110 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 08:36:43,110 INFO L913 BasicCegarLoop]: 377 mSDtfsCounter, 320 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:43,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 384 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 08:36:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-04-06 08:36:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1660. [2022-04-06 08:36:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1654 states have (on average 1.3627569528415961) internal successors, (2254), 1654 states have internal predecessors, (2254), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2259 transitions. [2022-04-06 08:36:43,132 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2259 transitions. Word has length 279 [2022-04-06 08:36:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:43,132 INFO L478 AbstractCegarLoop]: Abstraction has 1660 states and 2259 transitions. [2022-04-06 08:36:43,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2259 transitions. [2022-04-06 08:36:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-04-06 08:36:43,136 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:43,136 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:43,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-04-06 08:36:43,137 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:43,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1950874894, now seen corresponding path program 1 times [2022-04-06 08:36:43,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:43,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725577259] [2022-04-06 08:36:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:43,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:43,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-04-06 08:36:43,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725577259] [2022-04-06 08:36:43,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725577259] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:43,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:43,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157909287] [2022-04-06 08:36:43,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:43,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:43,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:43,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:43,198 INFO L87 Difference]: Start difference. First operand 1660 states and 2259 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:43,380 INFO L93 Difference]: Finished difference Result 1835 states and 2484 transitions. [2022-04-06 08:36:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:43,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2022-04-06 08:36:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:43,385 INFO L225 Difference]: With dead ends: 1835 [2022-04-06 08:36:43,385 INFO L226 Difference]: Without dead ends: 1835 [2022-04-06 08:36:43,385 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 08:36:43,385 INFO L913 BasicCegarLoop]: 214 mSDtfsCounter, 227 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:43,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 221 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2022-04-06 08:36:43,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1795. [2022-04-06 08:36:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1789 states have (on average 1.349357182783678) internal successors, (2414), 1789 states have internal predecessors, (2414), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2419 transitions. [2022-04-06 08:36:43,407 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2419 transitions. Word has length 326 [2022-04-06 08:36:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:43,408 INFO L478 AbstractCegarLoop]: Abstraction has 1795 states and 2419 transitions. [2022-04-06 08:36:43,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2419 transitions. [2022-04-06 08:36:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-04-06 08:36:43,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:43,411 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:43,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 08:36:43,412 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:43,412 INFO L85 PathProgramCache]: Analyzing trace with hash -199601085, now seen corresponding path program 1 times [2022-04-06 08:36:43,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:43,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88706633] [2022-04-06 08:36:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:43,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:43,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-04-06 08:36:43,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:43,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88706633] [2022-04-06 08:36:43,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88706633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:43,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:43,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:43,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671959654] [2022-04-06 08:36:43,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:43,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:43,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:43,456 INFO L87 Difference]: Start difference. First operand 1795 states and 2419 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:43,687 INFO L93 Difference]: Finished difference Result 1950 states and 2599 transitions. [2022-04-06 08:36:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:43,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 349 [2022-04-06 08:36:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:43,694 INFO L225 Difference]: With dead ends: 1950 [2022-04-06 08:36:43,694 INFO L226 Difference]: Without dead ends: 1950 [2022-04-06 08:36:43,694 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 08:36:43,695 INFO L913 BasicCegarLoop]: 214 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:43,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 221 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-04-06 08:36:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1940. [2022-04-06 08:36:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1934 states have (on average 1.3360910031023785) internal successors, (2584), 1934 states have internal predecessors, (2584), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 2589 transitions. [2022-04-06 08:36:43,732 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 2589 transitions. Word has length 349 [2022-04-06 08:36:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:43,732 INFO L478 AbstractCegarLoop]: Abstraction has 1940 states and 2589 transitions. [2022-04-06 08:36:43,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 2589 transitions. [2022-04-06 08:36:43,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-04-06 08:36:43,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:43,736 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:43,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-04-06 08:36:43,736 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2033863307, now seen corresponding path program 1 times [2022-04-06 08:36:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:43,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544926253] [2022-04-06 08:36:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:43,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 906 proven. 26 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2022-04-06 08:36:43,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544926253] [2022-04-06 08:36:43,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544926253] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:36:43,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331566200] [2022-04-06 08:36:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:43,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:36:43,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:36:43,805 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:36:43,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 08:36:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2022-04-06 08:36:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:36:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 494 proven. 0 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2022-04-06 08:36:44,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:36:44,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331566200] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:44,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:36:44,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-04-06 08:36:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94295810] [2022-04-06 08:36:44,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:44,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 08:36:44,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:44,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 08:36:44,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:36:44,439 INFO L87 Difference]: Start difference. First operand 1940 states and 2589 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:44,461 INFO L93 Difference]: Finished difference Result 2726 states and 3636 transitions. [2022-04-06 08:36:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 08:36:44,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 383 [2022-04-06 08:36:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:44,468 INFO L225 Difference]: With dead ends: 2726 [2022-04-06 08:36:44,468 INFO L226 Difference]: Without dead ends: 2726 [2022-04-06 08:36:44,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:36:44,468 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 139 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:44,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 374 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:36:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-04-06 08:36:44,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2726. [2022-04-06 08:36:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2726 states, 2720 states have (on average 1.3349264705882353) internal successors, (3631), 2720 states have internal predecessors, (3631), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 3636 transitions. [2022-04-06 08:36:44,500 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 3636 transitions. Word has length 383 [2022-04-06 08:36:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:44,501 INFO L478 AbstractCegarLoop]: Abstraction has 2726 states and 3636 transitions. [2022-04-06 08:36:44,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 3636 transitions. [2022-04-06 08:36:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-04-06 08:36:44,505 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:44,505 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:44,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 08:36:44,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 08:36:44,720 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1809069780, now seen corresponding path program 1 times [2022-04-06 08:36:44,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:44,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850317654] [2022-04-06 08:36:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:44,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:44,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 1196 proven. 26 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-04-06 08:36:44,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:44,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850317654] [2022-04-06 08:36:44,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850317654] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:36:44,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670103874] [2022-04-06 08:36:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:44,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:36:44,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:36:44,785 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:36:44,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 08:36:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:44,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 08:36:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:36:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 867 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2022-04-06 08:36:45,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:36:45,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670103874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:45,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:36:45,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-04-06 08:36:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812584948] [2022-04-06 08:36:45,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:45,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 08:36:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 08:36:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:36:45,547 INFO L87 Difference]: Start difference. First operand 2726 states and 3636 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:45,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:45,558 INFO L93 Difference]: Finished difference Result 2313 states and 3093 transitions. [2022-04-06 08:36:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 08:36:45,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 454 [2022-04-06 08:36:45,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:45,564 INFO L225 Difference]: With dead ends: 2313 [2022-04-06 08:36:45,564 INFO L226 Difference]: Without dead ends: 2313 [2022-04-06 08:36:45,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:36:45,565 INFO L913 BasicCegarLoop]: 371 mSDtfsCounter, 100 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:45,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 560 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:36:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-04-06 08:36:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1968. [2022-04-06 08:36:45,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1962 states have (on average 1.3363914373088686) internal successors, (2622), 1962 states have internal predecessors, (2622), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2627 transitions. [2022-04-06 08:36:45,592 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2627 transitions. Word has length 454 [2022-04-06 08:36:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:45,593 INFO L478 AbstractCegarLoop]: Abstraction has 1968 states and 2627 transitions. [2022-04-06 08:36:45,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2627 transitions. [2022-04-06 08:36:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-04-06 08:36:45,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:45,598 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:45,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 08:36:45,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 08:36:45,805 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash 853548501, now seen corresponding path program 1 times [2022-04-06 08:36:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:45,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385568677] [2022-04-06 08:36:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:45,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 1196 proven. 26 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-04-06 08:36:45,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385568677] [2022-04-06 08:36:45,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385568677] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:36:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947884068] [2022-04-06 08:36:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:45,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:36:45,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:36:45,864 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:36:45,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 08:36:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:45,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 08:36:45,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:36:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 1196 proven. 26 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-04-06 08:36:46,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:36:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 1196 proven. 26 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-04-06 08:36:46,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947884068] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:36:46,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 08:36:46,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-04-06 08:36:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152306710] [2022-04-06 08:36:46,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 08:36:46,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 08:36:46,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 08:36:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 08:36:46,996 INFO L87 Difference]: Start difference. First operand 1968 states and 2627 transitions. Second operand has 7 states, 7 states have (on average 35.714285714285715) internal successors, (250), 6 states have internal predecessors, (250), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:47,516 INFO L93 Difference]: Finished difference Result 2702 states and 3562 transitions. [2022-04-06 08:36:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 08:36:47,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.714285714285715) internal successors, (250), 6 states have internal predecessors, (250), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 454 [2022-04-06 08:36:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:47,522 INFO L225 Difference]: With dead ends: 2702 [2022-04-06 08:36:47,522 INFO L226 Difference]: Without dead ends: 2569 [2022-04-06 08:36:47,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 923 GetRequests, 913 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-04-06 08:36:47,523 INFO L913 BasicCegarLoop]: 304 mSDtfsCounter, 733 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:47,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 321 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 08:36:47,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-04-06 08:36:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1987. [2022-04-06 08:36:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1981 states have (on average 1.331145885916204) internal successors, (2637), 1981 states have internal predecessors, (2637), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2642 transitions. [2022-04-06 08:36:47,544 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2642 transitions. Word has length 454 [2022-04-06 08:36:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:47,544 INFO L478 AbstractCegarLoop]: Abstraction has 1987 states and 2642 transitions. [2022-04-06 08:36:47,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.714285714285715) internal successors, (250), 6 states have internal predecessors, (250), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2642 transitions. [2022-04-06 08:36:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-04-06 08:36:47,549 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:47,549 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 15, 12, 9, 9, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:47,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 08:36:47,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 08:36:47,767 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash -402012141, now seen corresponding path program 1 times [2022-04-06 08:36:47,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:47,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005671615] [2022-04-06 08:36:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:47,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:47,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4562 backedges. 2170 proven. 0 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2022-04-06 08:36:47,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005671615] [2022-04-06 08:36:47,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005671615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:47,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:47,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:47,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420504510] [2022-04-06 08:36:47,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:47,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:47,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:47,845 INFO L87 Difference]: Start difference. First operand 1987 states and 2642 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:48,033 INFO L93 Difference]: Finished difference Result 2203 states and 2888 transitions. [2022-04-06 08:36:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:48,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 663 [2022-04-06 08:36:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:48,039 INFO L225 Difference]: With dead ends: 2203 [2022-04-06 08:36:48,039 INFO L226 Difference]: Without dead ends: 2203 [2022-04-06 08:36:48,039 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 08:36:48,039 INFO L913 BasicCegarLoop]: 212 mSDtfsCounter, 206 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:48,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 219 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2022-04-06 08:36:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2191. [2022-04-06 08:36:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2185 states have (on average 1.31395881006865) internal successors, (2871), 2185 states have internal predecessors, (2871), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2876 transitions. [2022-04-06 08:36:48,067 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2876 transitions. Word has length 663 [2022-04-06 08:36:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:48,068 INFO L478 AbstractCegarLoop]: Abstraction has 2191 states and 2876 transitions. [2022-04-06 08:36:48,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2876 transitions. [2022-04-06 08:36:48,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2022-04-06 08:36:48,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:48,074 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 21, 21, 20, 20, 19, 19, 18, 18, 18, 18, 15, 12, 12, 9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:48,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-04-06 08:36:48,074 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1249705316, now seen corresponding path program 1 times [2022-04-06 08:36:48,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:48,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693142451] [2022-04-06 08:36:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:48,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2953 proven. 0 refuted. 0 times theorem prover too weak. 3223 trivial. 0 not checked. [2022-04-06 08:36:48,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:48,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693142451] [2022-04-06 08:36:48,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693142451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:36:48,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:36:48,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:36:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98370341] [2022-04-06 08:36:48,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:36:48,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:36:48,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:36:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:36:48,151 INFO L87 Difference]: Start difference. First operand 2191 states and 2876 transitions. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:48,346 INFO L93 Difference]: Finished difference Result 2419 states and 3134 transitions. [2022-04-06 08:36:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:36:48,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 756 [2022-04-06 08:36:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:48,352 INFO L225 Difference]: With dead ends: 2419 [2022-04-06 08:36:48,352 INFO L226 Difference]: Without dead ends: 2419 [2022-04-06 08:36:48,352 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 08:36:48,353 INFO L913 BasicCegarLoop]: 212 mSDtfsCounter, 206 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:48,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 219 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 08:36:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2022-04-06 08:36:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2407. [2022-04-06 08:36:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2401 states have (on average 1.2982090795501875) internal successors, (3117), 2401 states have internal predecessors, (3117), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3122 transitions. [2022-04-06 08:36:48,372 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3122 transitions. Word has length 756 [2022-04-06 08:36:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:48,373 INFO L478 AbstractCegarLoop]: Abstraction has 2407 states and 3122 transitions. [2022-04-06 08:36:48,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3122 transitions. [2022-04-06 08:36:48,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2022-04-06 08:36:48,382 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:36:48,382 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 24, 24, 23, 23, 22, 22, 21, 21, 21, 21, 18, 15, 15, 12, 12, 9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:48,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-04-06 08:36:48,382 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:36:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:36:48,383 INFO L85 PathProgramCache]: Analyzing trace with hash -783438281, now seen corresponding path program 1 times [2022-04-06 08:36:48,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:36:48,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640535052] [2022-04-06 08:36:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:48,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:36:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:48,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:36:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8111 backedges. 4746 proven. 26 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2022-04-06 08:36:48,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:36:48,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640535052] [2022-04-06 08:36:48,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640535052] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 08:36:48,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680055928] [2022-04-06 08:36:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:36:48,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:36:48,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:36:48,517 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 08:36:48,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 08:36:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:36:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 08:36:48,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:36:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8111 backedges. 4746 proven. 26 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2022-04-06 08:36:49,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:36:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8111 backedges. 4746 proven. 26 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2022-04-06 08:36:50,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680055928] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:36:50,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 08:36:50,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-04-06 08:36:50,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178277587] [2022-04-06 08:36:50,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 08:36:50,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 08:36:50,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:36:50,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 08:36:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 08:36:50,434 INFO L87 Difference]: Start difference. First operand 2407 states and 3122 transitions. Second operand has 9 states, 9 states have (on average 39.111111111111114) internal successors, (352), 8 states have internal predecessors, (352), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:36:51,099 INFO L93 Difference]: Finished difference Result 1817 states and 2370 transitions. [2022-04-06 08:36:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 08:36:51,100 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 39.111111111111114) internal successors, (352), 8 states have internal predecessors, (352), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 855 [2022-04-06 08:36:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:36:51,100 INFO L225 Difference]: With dead ends: 1817 [2022-04-06 08:36:51,100 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 08:36:51,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1723 GetRequests, 1712 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-04-06 08:36:51,101 INFO L913 BasicCegarLoop]: 300 mSDtfsCounter, 414 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 08:36:51,101 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 322 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 08:36:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 08:36:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 08:36:51,101 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 08:36:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 08:36:51,102 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 855 [2022-04-06 08:36:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:36:51,102 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 08:36:51,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.111111111111114) internal successors, (352), 8 states have internal predecessors, (352), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:36:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 08:36:51,102 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 08:36:51,104 INFO L788 garLoopResultBuilder]: Registering result SAFE for location ERRErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 08:36:51,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 08:36:51,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:36:51,324 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:36:51,325 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 08:36:51,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:36:51 BasicIcfg [2022-04-06 08:36:51,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 08:36:51,327 INFO L158 Benchmark]: Toolchain (without parser) took 13098.02ms. Allocated memory was 190.8MB in the beginning and 314.6MB in the end (delta: 123.7MB). Free memory was 141.7MB in the beginning and 170.4MB in the end (delta: -28.7MB). Peak memory consumption was 94.2MB. Max. memory is 8.0GB. [2022-04-06 08:36:51,327 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 190.8MB. Free memory was 158.1MB in the beginning and 158.0MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 08:36:51,327 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.50ms. Allocated memory is still 190.8MB. Free memory was 141.4MB in the beginning and 162.1MB in the end (delta: -20.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 08:36:51,328 INFO L158 Benchmark]: Boogie Preprocessor took 32.57ms. Allocated memory is still 190.8MB. Free memory was 162.1MB in the beginning and 159.5MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-04-06 08:36:51,328 INFO L158 Benchmark]: RCFGBuilder took 581.76ms. Allocated memory is still 190.8MB. Free memory was 159.5MB in the beginning and 131.2MB in the end (delta: 28.3MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2022-04-06 08:36:51,328 INFO L158 Benchmark]: IcfgTransformer took 31.61ms. Allocated memory is still 190.8MB. Free memory was 131.2MB in the beginning and 128.0MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-04-06 08:36:51,328 INFO L158 Benchmark]: TraceAbstraction took 12190.25ms. Allocated memory was 190.8MB in the beginning and 314.6MB in the end (delta: 123.7MB). Free memory was 127.5MB in the beginning and 170.4MB in the end (delta: -42.9MB). Peak memory consumption was 82.0MB. Max. memory is 8.0GB. [2022-04-06 08:36:51,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 190.8MB. Free memory was 158.1MB in the beginning and 158.0MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 244.50ms. Allocated memory is still 190.8MB. Free memory was 141.4MB in the beginning and 162.1MB in the end (delta: -20.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.57ms. Allocated memory is still 190.8MB. Free memory was 162.1MB in the beginning and 159.5MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 581.76ms. Allocated memory is still 190.8MB. Free memory was 159.5MB in the beginning and 131.2MB in the end (delta: 28.3MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * IcfgTransformer took 31.61ms. Allocated memory is still 190.8MB. Free memory was 131.2MB in the beginning and 128.0MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * TraceAbstraction took 12190.25ms. Allocated memory was 190.8MB in the beginning and 314.6MB in the end (delta: 123.7MB). Free memory was 127.5MB in the beginning and 170.4MB in the end (delta: -42.9MB). Peak memory consumption was 82.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 630]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 155 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.1s, OverallIterations: 21, TraceHistogramMax: 26, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5988 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5986 mSDsluCounter, 5875 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 529 mSDsCounter, 534 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5886 IncrementalHoareTripleChecker+Invalid, 6420 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 534 mSolverCounterUnsat, 5346 mSDtfsCounter, 5886 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3611 GetRequests, 3531 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2726occurred in iteration=16, InterpolantAutomatonStates: 89, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 21 MinimizatonAttempts, 1119 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 8257 NumberOfCodeBlocks, 8257 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 9539 ConstructedInterpolants, 0 QuantifiedInterpolants, 13341 SizeOfPredicates, 2 NumberOfNonLiveVariables, 3597 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 27 InterpolantComputations, 19 PerfectInterpolantSequences, 52197/52405 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-06 08:36:51,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...