/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-b030c9e [2022-03-20 07:28:07,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 07:28:07,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 07:28:07,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 07:28:07,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 07:28:07,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 07:28:07,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 07:28:07,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 07:28:07,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 07:28:07,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 07:28:07,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 07:28:07,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 07:28:07,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 07:28:07,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 07:28:07,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 07:28:07,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 07:28:07,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 07:28:07,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 07:28:07,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 07:28:07,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 07:28:07,390 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 07:28:07,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 07:28:07,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 07:28:07,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 07:28:07,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 07:28:07,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-20 07:28:07,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-20 07:28:07,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-20 07:28:07,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-20 07:28:07,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-20 07:28:07,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-20 07:28:07,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-20 07:28:07,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-20 07:28:07,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-20 07:28:07,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-20 07:28:07,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-20 07:28:07,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-20 07:28:07,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-20 07:28:07,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-20 07:28:07,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 07:28:07,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 07:28:07,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 07:28:07,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 07:28:07,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 07:28:07,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 07:28:07,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 07:28:07,418 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 07:28:07,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 07:28:07,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 07:28:07,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 07:28:07,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 07:28:07,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 07:28:07,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 07:28:07,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:28:07,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 07:28:07,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 07:28:07,421 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 07:28:07,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 07:28:07,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 07:28:07,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 07:28:07,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 07:28:07,606 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 07:28:07,607 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 07:28:07,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c [2022-03-20 07:28:07,663 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d087d61c/33871abb15d94966aff89da4000a2f32/FLAG47dbf347e [2022-03-20 07:28:07,955 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 07:28:07,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/openssl-simplified/s3_srvr_1.cil-2.c [2022-03-20 07:28:07,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d087d61c/33871abb15d94966aff89da4000a2f32/FLAG47dbf347e [2022-03-20 07:28:08,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d087d61c/33871abb15d94966aff89da4000a2f32 [2022-03-20 07:28:08,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 07:28:08,380 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 07:28:08,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 07:28:08,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 07:28:08,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 07:28:08,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3065fce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08, skipping insertion in model container [2022-03-20 07:28:08,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 07:28:08,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 07:28:08,604 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] [2022-03-20 07:28:08,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:28:08,612 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 07:28:08,663 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] [2022-03-20 07:28:08,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:28:08,672 INFO L208 MainTranslator]: Completed translation [2022-03-20 07:28:08,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08 WrapperNode [2022-03-20 07:28:08,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 07:28:08,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 07:28:08,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 07:28:08,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 07:28:08,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 07:28:08,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 07:28:08,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 07:28:08,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 07:28:08,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (1/1) ... [2022-03-20 07:28:08,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:28:08,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:28:08,751 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) [2022-03-20 07:28:08,756 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 [2022-03-20 07:28:08,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 07:28:08,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 07:28:08,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 07:28:08,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2022-03-20 07:28:08,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR [2022-03-20 07:28:08,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 07:28:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 07:28:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 07:28:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 07:28:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 07:28:08,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure ERR [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 07:28:08,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 07:28:08,893 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 07:28:08,894 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 07:28:08,956 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-03-20 07:28:09,261 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-03-20 07:28:09,261 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-03-20 07:28:09,272 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 07:28:09,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 07:28:09,278 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 07:28:09,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:28:09 BoogieIcfgContainer [2022-03-20 07:28:09,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 07:28:09,280 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 07:28:09,280 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 07:28:09,288 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 07:28:09,290 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:28:09" (1/1) ... [2022-03-20 07:28:09,291 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 07:28:09,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:28:09 BasicIcfg [2022-03-20 07:28:09,324 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 07:28:09,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 07:28:09,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 07:28:09,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 07:28:09,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:28:08" (1/4) ... [2022-03-20 07:28:09,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc3e014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:28:09, skipping insertion in model container [2022-03-20 07:28:09,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:08" (2/4) ... [2022-03-20 07:28:09,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc3e014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:28:09, skipping insertion in model container [2022-03-20 07:28:09,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:28:09" (3/4) ... [2022-03-20 07:28:09,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc3e014 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:28:09, skipping insertion in model container [2022-03-20 07:28:09,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:28:09" (4/4) ... [2022-03-20 07:28:09,329 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1.cil-2.cJordan [2022-03-20 07:28:09,332 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 07:28:09,332 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 07:28:09,389 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 07:28:09,397 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 [2022-03-20 07:28:09,397 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 07:28:09,411 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) [2022-03-20 07:28:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 07:28:09,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:09,426 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] [2022-03-20 07:28:09,427 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 270340497, now seen corresponding path program 1 times [2022-03-20 07:28:09,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:09,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846941404] [2022-03-20 07:28:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:09,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:09,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:09,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:09,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846941404] [2022-03-20 07:28:09,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846941404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:09,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:09,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968424151] [2022-03-20 07:28:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:09,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:09,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:09,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:09,758 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) [2022-03-20 07:28:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:10,094 INFO L93 Difference]: Finished difference Result 283 states and 465 transitions. [2022-03-20 07:28:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:10,096 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 [2022-03-20 07:28:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:10,117 INFO L225 Difference]: With dead ends: 283 [2022-03-20 07:28:10,117 INFO L226 Difference]: Without dead ends: 256 [2022-03-20 07:28:10,118 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 [2022-03-20 07:28:10,120 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:10,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 251 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 07:28:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-20 07:28:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-03-20 07:28:10,170 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) [2022-03-20 07:28:10,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 385 transitions. [2022-03-20 07:28:10,172 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 385 transitions. Word has length 52 [2022-03-20 07:28:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:10,173 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 385 transitions. [2022-03-20 07:28:10,173 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) [2022-03-20 07:28:10,173 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 385 transitions. [2022-03-20 07:28:10,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 07:28:10,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:10,177 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] [2022-03-20 07:28:10,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 07:28:10,178 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:10,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1820054526, now seen corresponding path program 1 times [2022-03-20 07:28:10,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:10,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401690306] [2022-03-20 07:28:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:10,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:10,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:10,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401690306] [2022-03-20 07:28:10,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401690306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:10,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:10,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:10,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878608350] [2022-03-20 07:28:10,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:10,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:10,267 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) [2022-03-20 07:28:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:10,490 INFO L93 Difference]: Finished difference Result 285 states and 422 transitions. [2022-03-20 07:28:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:10,491 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 [2022-03-20 07:28:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:10,493 INFO L225 Difference]: With dead ends: 285 [2022-03-20 07:28:10,493 INFO L226 Difference]: Without dead ends: 285 [2022-03-20 07:28:10,496 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 [2022-03-20 07:28:10,498 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 [2022-03-20 07:28:10,498 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] [2022-03-20 07:28:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-20 07:28:10,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 277. [2022-03-20 07:28:10,521 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) [2022-03-20 07:28:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 411 transitions. [2022-03-20 07:28:10,522 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 411 transitions. Word has length 68 [2022-03-20 07:28:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:10,523 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 411 transitions. [2022-03-20 07:28:10,523 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) [2022-03-20 07:28:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 411 transitions. [2022-03-20 07:28:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 07:28:10,525 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:10,525 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] [2022-03-20 07:28:10,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 07:28:10,526 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:10,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1118947656, now seen corresponding path program 1 times [2022-03-20 07:28:10,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:10,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715163759] [2022-03-20 07:28:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:10,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:10,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 07:28:10,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:10,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715163759] [2022-03-20 07:28:10,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715163759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:10,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:10,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336200968] [2022-03-20 07:28:10,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:10,585 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:10,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:10,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:10,586 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) [2022-03-20 07:28:10,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:10,795 INFO L93 Difference]: Finished difference Result 369 states and 514 transitions. [2022-03-20 07:28:10,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:10,795 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 [2022-03-20 07:28:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:10,798 INFO L225 Difference]: With dead ends: 369 [2022-03-20 07:28:10,798 INFO L226 Difference]: Without dead ends: 369 [2022-03-20 07:28:10,801 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 [2022-03-20 07:28:10,804 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 [2022-03-20 07:28:10,804 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] [2022-03-20 07:28:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-20 07:28:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 361. [2022-03-20 07:28:10,811 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) [2022-03-20 07:28:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 505 transitions. [2022-03-20 07:28:10,812 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 505 transitions. Word has length 89 [2022-03-20 07:28:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:10,812 INFO L478 AbstractCegarLoop]: Abstraction has 361 states and 505 transitions. [2022-03-20 07:28:10,812 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) [2022-03-20 07:28:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 505 transitions. [2022-03-20 07:28:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 07:28:10,815 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:10,820 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] [2022-03-20 07:28:10,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 07:28:10,821 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2143641577, now seen corresponding path program 1 times [2022-03-20 07:28:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:10,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606847304] [2022-03-20 07:28:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:10,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 07:28:10,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606847304] [2022-03-20 07:28:10,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606847304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:10,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:10,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:10,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838674036] [2022-03-20 07:28:10,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:10,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:10,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:10,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:10,870 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) [2022-03-20 07:28:11,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:11,053 INFO L93 Difference]: Finished difference Result 415 states and 571 transitions. [2022-03-20 07:28:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:11,053 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 [2022-03-20 07:28:11,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:11,055 INFO L225 Difference]: With dead ends: 415 [2022-03-20 07:28:11,055 INFO L226 Difference]: Without dead ends: 415 [2022-03-20 07:28:11,055 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 [2022-03-20 07:28:11,056 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 [2022-03-20 07:28:11,056 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] [2022-03-20 07:28:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-20 07:28:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 407. [2022-03-20 07:28:11,067 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) [2022-03-20 07:28:11,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 561 transitions. [2022-03-20 07:28:11,068 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 561 transitions. Word has length 89 [2022-03-20 07:28:11,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:11,069 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 561 transitions. [2022-03-20 07:28:11,069 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) [2022-03-20 07:28:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 561 transitions. [2022-03-20 07:28:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 07:28:11,076 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:11,076 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] [2022-03-20 07:28:11,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 07:28:11,076 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1568616926, now seen corresponding path program 1 times [2022-03-20 07:28:11,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:11,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757561338] [2022-03-20 07:28:11,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:11,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:11,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 07:28:11,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:11,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757561338] [2022-03-20 07:28:11,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757561338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:11,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:11,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:11,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813919082] [2022-03-20 07:28:11,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:11,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:11,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:11,139 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) [2022-03-20 07:28:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:11,352 INFO L93 Difference]: Finished difference Result 483 states and 663 transitions. [2022-03-20 07:28:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:11,355 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 [2022-03-20 07:28:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:11,360 INFO L225 Difference]: With dead ends: 483 [2022-03-20 07:28:11,361 INFO L226 Difference]: Without dead ends: 483 [2022-03-20 07:28:11,361 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 [2022-03-20 07:28:11,361 INFO L913 BasicCegarLoop]: 217 mSDtfsCounter, 249 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 07:28:11,362 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] [2022-03-20 07:28:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-20 07:28:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 457. [2022-03-20 07:28:11,368 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) [2022-03-20 07:28:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 621 transitions. [2022-03-20 07:28:11,369 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 621 transitions. Word has length 110 [2022-03-20 07:28:11,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:11,370 INFO L478 AbstractCegarLoop]: Abstraction has 457 states and 621 transitions. [2022-03-20 07:28:11,370 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) [2022-03-20 07:28:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 621 transitions. [2022-03-20 07:28:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 07:28:11,372 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:11,372 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] [2022-03-20 07:28:11,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 07:28:11,372 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:11,372 INFO L85 PathProgramCache]: Analyzing trace with hash 710803079, now seen corresponding path program 1 times [2022-03-20 07:28:11,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:11,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266181546] [2022-03-20 07:28:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:11,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:11,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 07:28:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:11,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266181546] [2022-03-20 07:28:11,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266181546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:11,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:11,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:11,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144963324] [2022-03-20 07:28:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:11,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:11,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:11,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:11,470 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) [2022-03-20 07:28:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:11,814 INFO L93 Difference]: Finished difference Result 684 states and 927 transitions. [2022-03-20 07:28:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:11,814 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 [2022-03-20 07:28:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:11,817 INFO L225 Difference]: With dead ends: 684 [2022-03-20 07:28:11,817 INFO L226 Difference]: Without dead ends: 684 [2022-03-20 07:28:11,817 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 [2022-03-20 07:28:11,820 INFO L913 BasicCegarLoop]: 374 mSDtfsCounter, 334 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:11,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 381 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 07:28:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-20 07:28:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-03-20 07:28:11,831 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) [2022-03-20 07:28:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 927 transitions. [2022-03-20 07:28:11,832 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 927 transitions. Word has length 129 [2022-03-20 07:28:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:11,833 INFO L478 AbstractCegarLoop]: Abstraction has 684 states and 927 transitions. [2022-03-20 07:28:11,833 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) [2022-03-20 07:28:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 927 transitions. [2022-03-20 07:28:11,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 07:28:11,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:11,835 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] [2022-03-20 07:28:11,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 07:28:11,835 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash -989937400, now seen corresponding path program 1 times [2022-03-20 07:28:11,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:11,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442079780] [2022-03-20 07:28:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:11,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-20 07:28:11,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:11,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442079780] [2022-03-20 07:28:11,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442079780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:11,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:11,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:11,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830207730] [2022-03-20 07:28:11,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:11,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:11,903 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) [2022-03-20 07:28:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:12,058 INFO L93 Difference]: Finished difference Result 913 states and 1236 transitions. [2022-03-20 07:28:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:12,058 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 [2022-03-20 07:28:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:12,061 INFO L225 Difference]: With dead ends: 913 [2022-03-20 07:28:12,061 INFO L226 Difference]: Without dead ends: 913 [2022-03-20 07:28:12,061 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 [2022-03-20 07:28:12,062 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 [2022-03-20 07:28:12,062 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] [2022-03-20 07:28:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-03-20 07:28:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-03-20 07:28:12,072 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) [2022-03-20 07:28:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1236 transitions. [2022-03-20 07:28:12,075 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1236 transitions. Word has length 129 [2022-03-20 07:28:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:12,075 INFO L478 AbstractCegarLoop]: Abstraction has 913 states and 1236 transitions. [2022-03-20 07:28:12,075 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) [2022-03-20 07:28:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1236 transitions. [2022-03-20 07:28:12,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 07:28:12,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:12,077 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] [2022-03-20 07:28:12,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 07:28:12,077 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:12,078 INFO L85 PathProgramCache]: Analyzing trace with hash 178258855, now seen corresponding path program 1 times [2022-03-20 07:28:12,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:12,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32370916] [2022-03-20 07:28:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:12,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:12,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-20 07:28:12,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:12,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32370916] [2022-03-20 07:28:12,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32370916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:12,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:12,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:12,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135695274] [2022-03-20 07:28:12,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:12,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:12,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:12,130 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) [2022-03-20 07:28:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:12,282 INFO L93 Difference]: Finished difference Result 937 states and 1265 transitions. [2022-03-20 07:28:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:12,282 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 [2022-03-20 07:28:12,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:12,285 INFO L225 Difference]: With dead ends: 937 [2022-03-20 07:28:12,285 INFO L226 Difference]: Without dead ends: 937 [2022-03-20 07:28:12,285 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 [2022-03-20 07:28:12,286 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 [2022-03-20 07:28:12,286 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] [2022-03-20 07:28:12,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-03-20 07:28:12,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 937. [2022-03-20 07:28:12,296 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) [2022-03-20 07:28:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1265 transitions. [2022-03-20 07:28:12,298 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1265 transitions. Word has length 129 [2022-03-20 07:28:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:12,299 INFO L478 AbstractCegarLoop]: Abstraction has 937 states and 1265 transitions. [2022-03-20 07:28:12,299 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) [2022-03-20 07:28:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1265 transitions. [2022-03-20 07:28:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 07:28:12,301 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:12,301 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] [2022-03-20 07:28:12,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 07:28:12,301 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash 123134098, now seen corresponding path program 1 times [2022-03-20 07:28:12,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:12,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364116821] [2022-03-20 07:28:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:12,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:12,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-03-20 07:28:12,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:12,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364116821] [2022-03-20 07:28:12,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364116821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:12,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:12,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:12,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235531744] [2022-03-20 07:28:12,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:12,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:12,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:12,339 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) [2022-03-20 07:28:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:12,546 INFO L93 Difference]: Finished difference Result 1106 states and 1473 transitions. [2022-03-20 07:28:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:12,547 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 [2022-03-20 07:28:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:12,550 INFO L225 Difference]: With dead ends: 1106 [2022-03-20 07:28:12,550 INFO L226 Difference]: Without dead ends: 1106 [2022-03-20 07:28:12,550 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 [2022-03-20 07:28:12,550 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 [2022-03-20 07:28:12,550 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] [2022-03-20 07:28:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-03-20 07:28:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1060. [2022-03-20 07:28:12,562 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) [2022-03-20 07:28:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1412 transitions. [2022-03-20 07:28:12,564 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1412 transitions. Word has length 167 [2022-03-20 07:28:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:12,564 INFO L478 AbstractCegarLoop]: Abstraction has 1060 states and 1412 transitions. [2022-03-20 07:28:12,564 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) [2022-03-20 07:28:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1412 transitions. [2022-03-20 07:28:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 07:28:12,566 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:12,567 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] [2022-03-20 07:28:12,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 07:28:12,567 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash -256620717, now seen corresponding path program 1 times [2022-03-20 07:28:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:12,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780910449] [2022-03-20 07:28:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:12,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:12,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 07:28:12,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780910449] [2022-03-20 07:28:12,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780910449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:12,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:12,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:12,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084857845] [2022-03-20 07:28:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:12,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:12,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:12,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:12,601 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) [2022-03-20 07:28:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:12,759 INFO L93 Difference]: Finished difference Result 1289 states and 1778 transitions. [2022-03-20 07:28:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:12,759 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 [2022-03-20 07:28:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:12,763 INFO L225 Difference]: With dead ends: 1289 [2022-03-20 07:28:12,764 INFO L226 Difference]: Without dead ends: 1285 [2022-03-20 07:28:12,764 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 [2022-03-20 07:28:12,764 INFO L913 BasicCegarLoop]: 216 mSDtfsCounter, 338 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:12,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 223 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:12,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-03-20 07:28:12,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1264. [2022-03-20 07:28:12,779 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) [2022-03-20 07:28:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1751 transitions. [2022-03-20 07:28:12,782 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1751 transitions. Word has length 181 [2022-03-20 07:28:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:12,782 INFO L478 AbstractCegarLoop]: Abstraction has 1264 states and 1751 transitions. [2022-03-20 07:28:12,782 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) [2022-03-20 07:28:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1751 transitions. [2022-03-20 07:28:12,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-03-20 07:28:12,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:12,785 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] [2022-03-20 07:28:12,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 07:28:12,785 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:12,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash -863922344, now seen corresponding path program 1 times [2022-03-20 07:28:12,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:12,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237714080] [2022-03-20 07:28:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:12,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:12,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-03-20 07:28:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:12,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237714080] [2022-03-20 07:28:12,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237714080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:12,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:12,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674396859] [2022-03-20 07:28:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:12,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:12,836 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) [2022-03-20 07:28:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:13,023 INFO L93 Difference]: Finished difference Result 1388 states and 1895 transitions. [2022-03-20 07:28:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:13,024 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 [2022-03-20 07:28:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:13,028 INFO L225 Difference]: With dead ends: 1388 [2022-03-20 07:28:13,028 INFO L226 Difference]: Without dead ends: 1388 [2022-03-20 07:28:13,028 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 [2022-03-20 07:28:13,029 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 [2022-03-20 07:28:13,029 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] [2022-03-20 07:28:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-03-20 07:28:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1388. [2022-03-20 07:28:13,045 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) [2022-03-20 07:28:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1895 transitions. [2022-03-20 07:28:13,048 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1895 transitions. Word has length 210 [2022-03-20 07:28:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:13,048 INFO L478 AbstractCegarLoop]: Abstraction has 1388 states and 1895 transitions. [2022-03-20 07:28:13,048 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) [2022-03-20 07:28:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1895 transitions. [2022-03-20 07:28:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-20 07:28:13,051 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:13,052 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] [2022-03-20 07:28:13,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 07:28:13,052 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:13,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:13,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1363637268, now seen corresponding path program 1 times [2022-03-20 07:28:13,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:13,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315041515] [2022-03-20 07:28:13,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:13,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:13,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-03-20 07:28:13,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:13,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315041515] [2022-03-20 07:28:13,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315041515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:13,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:13,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:13,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471823041] [2022-03-20 07:28:13,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:13,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:13,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:13,112 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) [2022-03-20 07:28:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:13,323 INFO L93 Difference]: Finished difference Result 1556 states and 2079 transitions. [2022-03-20 07:28:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:13,323 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 [2022-03-20 07:28:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:13,327 INFO L225 Difference]: With dead ends: 1556 [2022-03-20 07:28:13,327 INFO L226 Difference]: Without dead ends: 1381 [2022-03-20 07:28:13,327 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 [2022-03-20 07:28:13,327 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 [2022-03-20 07:28:13,328 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] [2022-03-20 07:28:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2022-03-20 07:28:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1381. [2022-03-20 07:28:13,342 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) [2022-03-20 07:28:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 1877 transitions. [2022-03-20 07:28:13,345 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 1877 transitions. Word has length 239 [2022-03-20 07:28:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:13,345 INFO L478 AbstractCegarLoop]: Abstraction has 1381 states and 1877 transitions. [2022-03-20 07:28:13,345 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) [2022-03-20 07:28:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 1877 transitions. [2022-03-20 07:28:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-03-20 07:28:13,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:13,348 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] [2022-03-20 07:28:13,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 07:28:13,348 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 667275459, now seen corresponding path program 1 times [2022-03-20 07:28:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:13,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216007837] [2022-03-20 07:28:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:13,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-20 07:28:13,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:13,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216007837] [2022-03-20 07:28:13,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216007837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:13,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:13,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:13,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167741289] [2022-03-20 07:28:13,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:13,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:13,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:13,404 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) [2022-03-20 07:28:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:13,567 INFO L93 Difference]: Finished difference Result 2603 states and 3556 transitions. [2022-03-20 07:28:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:13,567 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 [2022-03-20 07:28:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:13,573 INFO L225 Difference]: With dead ends: 2603 [2022-03-20 07:28:13,573 INFO L226 Difference]: Without dead ends: 1661 [2022-03-20 07:28:13,574 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 [2022-03-20 07:28:13,575 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 [2022-03-20 07:28:13,575 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] [2022-03-20 07:28:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-03-20 07:28:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1660. [2022-03-20 07:28:13,597 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) [2022-03-20 07:28:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2259 transitions. [2022-03-20 07:28:13,601 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2259 transitions. Word has length 279 [2022-03-20 07:28:13,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:13,601 INFO L478 AbstractCegarLoop]: Abstraction has 1660 states and 2259 transitions. [2022-03-20 07:28:13,601 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) [2022-03-20 07:28:13,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2259 transitions. [2022-03-20 07:28:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-03-20 07:28:13,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:13,605 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] [2022-03-20 07:28:13,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 07:28:13,605 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:13,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:13,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1950874894, now seen corresponding path program 1 times [2022-03-20 07:28:13,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:13,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003375460] [2022-03-20 07:28:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:13,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:13,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-03-20 07:28:13,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003375460] [2022-03-20 07:28:13,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003375460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:13,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:13,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2378575] [2022-03-20 07:28:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:13,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:13,662 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) [2022-03-20 07:28:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:13,845 INFO L93 Difference]: Finished difference Result 1835 states and 2484 transitions. [2022-03-20 07:28:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:13,845 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 [2022-03-20 07:28:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:13,850 INFO L225 Difference]: With dead ends: 1835 [2022-03-20 07:28:13,850 INFO L226 Difference]: Without dead ends: 1835 [2022-03-20 07:28:13,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:13,850 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 [2022-03-20 07:28:13,851 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] [2022-03-20 07:28:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2022-03-20 07:28:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1795. [2022-03-20 07:28:13,871 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) [2022-03-20 07:28:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 2419 transitions. [2022-03-20 07:28:13,875 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 2419 transitions. Word has length 326 [2022-03-20 07:28:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:13,876 INFO L478 AbstractCegarLoop]: Abstraction has 1795 states and 2419 transitions. [2022-03-20 07:28:13,876 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) [2022-03-20 07:28:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 2419 transitions. [2022-03-20 07:28:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-03-20 07:28:13,879 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:13,879 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] [2022-03-20 07:28:13,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 07:28:13,880 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -199601085, now seen corresponding path program 1 times [2022-03-20 07:28:13,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:13,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932476631] [2022-03-20 07:28:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:13,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:13,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-03-20 07:28:13,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932476631] [2022-03-20 07:28:13,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932476631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:13,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:13,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122754842] [2022-03-20 07:28:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:13,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:13,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:13,943 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) [2022-03-20 07:28:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:14,121 INFO L93 Difference]: Finished difference Result 1950 states and 2599 transitions. [2022-03-20 07:28:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:14,121 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 [2022-03-20 07:28:14,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:14,126 INFO L225 Difference]: With dead ends: 1950 [2022-03-20 07:28:14,126 INFO L226 Difference]: Without dead ends: 1950 [2022-03-20 07:28:14,128 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 [2022-03-20 07:28:14,129 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 [2022-03-20 07:28:14,129 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] [2022-03-20 07:28:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-03-20 07:28:14,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1940. [2022-03-20 07:28:14,155 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) [2022-03-20 07:28:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 2589 transitions. [2022-03-20 07:28:14,163 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 2589 transitions. Word has length 349 [2022-03-20 07:28:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:14,164 INFO L478 AbstractCegarLoop]: Abstraction has 1940 states and 2589 transitions. [2022-03-20 07:28:14,164 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) [2022-03-20 07:28:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 2589 transitions. [2022-03-20 07:28:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-03-20 07:28:14,168 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:14,168 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] [2022-03-20 07:28:14,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 07:28:14,168 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:14,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2033863307, now seen corresponding path program 1 times [2022-03-20 07:28:14,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:14,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494495241] [2022-03-20 07:28:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:14,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:14,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 906 proven. 26 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2022-03-20 07:28:14,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494495241] [2022-03-20 07:28:14,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494495241] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:28:14,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099193554] [2022-03-20 07:28:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:14,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:28:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:28:14,236 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) [2022-03-20 07:28:14,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 07:28:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2022-03-20 07:28:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:28:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 494 proven. 0 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2022-03-20 07:28:14,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 07:28:14,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099193554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:14,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:28:14,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-03-20 07:28:14,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741319352] [2022-03-20 07:28:14,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:14,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 07:28:14,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:14,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 07:28:14,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 07:28:14,883 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) [2022-03-20 07:28:14,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:14,906 INFO L93 Difference]: Finished difference Result 2726 states and 3636 transitions. [2022-03-20 07:28:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 07:28:14,906 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 [2022-03-20 07:28:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:14,914 INFO L225 Difference]: With dead ends: 2726 [2022-03-20 07:28:14,914 INFO L226 Difference]: Without dead ends: 2726 [2022-03-20 07:28:14,914 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 [2022-03-20 07:28:14,914 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 [2022-03-20 07:28:14,915 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] [2022-03-20 07:28:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-03-20 07:28:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2726. [2022-03-20 07:28:14,944 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) [2022-03-20 07:28:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 3636 transitions. [2022-03-20 07:28:14,969 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 3636 transitions. Word has length 383 [2022-03-20 07:28:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:14,970 INFO L478 AbstractCegarLoop]: Abstraction has 2726 states and 3636 transitions. [2022-03-20 07:28:14,970 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) [2022-03-20 07:28:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 3636 transitions. [2022-03-20 07:28:14,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-03-20 07:28:14,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:14,976 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] [2022-03-20 07:28:15,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 07:28:15,192 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 [2022-03-20 07:28:15,192 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:15,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1809069780, now seen corresponding path program 1 times [2022-03-20 07:28:15,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:15,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353418340] [2022-03-20 07:28:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 1196 proven. 26 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-03-20 07:28:15,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:15,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353418340] [2022-03-20 07:28:15,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353418340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:28:15,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334888967] [2022-03-20 07:28:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:15,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:28:15,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:28:15,257 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) [2022-03-20 07:28:15,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 07:28:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 07:28:15,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:28:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 867 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2022-03-20 07:28:15,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 07:28:15,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334888967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:15,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:28:15,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-03-20 07:28:15,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320034421] [2022-03-20 07:28:15,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:15,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 07:28:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 07:28:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 07:28:15,919 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) [2022-03-20 07:28:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:15,932 INFO L93 Difference]: Finished difference Result 2313 states and 3093 transitions. [2022-03-20 07:28:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 07:28:15,932 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 [2022-03-20 07:28:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:15,939 INFO L225 Difference]: With dead ends: 2313 [2022-03-20 07:28:15,939 INFO L226 Difference]: Without dead ends: 2313 [2022-03-20 07:28:15,939 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 [2022-03-20 07:28:15,939 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 [2022-03-20 07:28:15,940 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] [2022-03-20 07:28:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-03-20 07:28:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1968. [2022-03-20 07:28:15,963 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) [2022-03-20 07:28:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2627 transitions. [2022-03-20 07:28:15,966 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2627 transitions. Word has length 454 [2022-03-20 07:28:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:15,967 INFO L478 AbstractCegarLoop]: Abstraction has 1968 states and 2627 transitions. [2022-03-20 07:28:15,967 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) [2022-03-20 07:28:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2627 transitions. [2022-03-20 07:28:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2022-03-20 07:28:15,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:15,973 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] [2022-03-20 07:28:15,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 07:28:16,195 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 [2022-03-20 07:28:16,195 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash 853548501, now seen corresponding path program 1 times [2022-03-20 07:28:16,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:16,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291139103] [2022-03-20 07:28:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:16,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 1196 proven. 26 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-03-20 07:28:16,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:16,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291139103] [2022-03-20 07:28:16,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291139103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:28:16,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729391133] [2022-03-20 07:28:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:16,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:28:16,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:28:16,298 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) [2022-03-20 07:28:16,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 07:28:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 07:28:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:28:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 1196 proven. 26 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-03-20 07:28:16,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:28:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 1196 proven. 26 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-03-20 07:28:17,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729391133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 07:28:17,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 07:28:17,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-20 07:28:17,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093835516] [2022-03-20 07:28:17,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 07:28:17,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 07:28:17,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 07:28:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 07:28:17,523 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) [2022-03-20 07:28:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:18,028 INFO L93 Difference]: Finished difference Result 2702 states and 3562 transitions. [2022-03-20 07:28:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 07:28:18,028 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 [2022-03-20 07:28:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:18,034 INFO L225 Difference]: With dead ends: 2702 [2022-03-20 07:28:18,034 INFO L226 Difference]: Without dead ends: 2569 [2022-03-20 07:28:18,035 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 [2022-03-20 07:28:18,035 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:18,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 321 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 07:28:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-03-20 07:28:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1987. [2022-03-20 07:28:18,074 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) [2022-03-20 07:28:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 2642 transitions. [2022-03-20 07:28:18,078 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 2642 transitions. Word has length 454 [2022-03-20 07:28:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:18,078 INFO L478 AbstractCegarLoop]: Abstraction has 1987 states and 2642 transitions. [2022-03-20 07:28:18,079 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) [2022-03-20 07:28:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 2642 transitions. [2022-03-20 07:28:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-03-20 07:28:18,083 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:18,084 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] [2022-03-20 07:28:18,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 07:28:18,292 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 [2022-03-20 07:28:18,292 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash -402012141, now seen corresponding path program 1 times [2022-03-20 07:28:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036543865] [2022-03-20 07:28:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:18,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:18,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4562 backedges. 2170 proven. 0 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2022-03-20 07:28:18,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:18,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036543865] [2022-03-20 07:28:18,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036543865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:18,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:18,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:18,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733144333] [2022-03-20 07:28:18,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:18,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:18,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:18,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:18,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:18,368 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) [2022-03-20 07:28:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:18,544 INFO L93 Difference]: Finished difference Result 2203 states and 2888 transitions. [2022-03-20 07:28:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:18,544 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 [2022-03-20 07:28:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:18,549 INFO L225 Difference]: With dead ends: 2203 [2022-03-20 07:28:18,549 INFO L226 Difference]: Without dead ends: 2203 [2022-03-20 07:28:18,550 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 [2022-03-20 07:28:18,550 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 [2022-03-20 07:28:18,550 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] [2022-03-20 07:28:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2022-03-20 07:28:18,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 2191. [2022-03-20 07:28:18,572 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) [2022-03-20 07:28:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 2876 transitions. [2022-03-20 07:28:18,575 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 2876 transitions. Word has length 663 [2022-03-20 07:28:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:18,575 INFO L478 AbstractCegarLoop]: Abstraction has 2191 states and 2876 transitions. [2022-03-20 07:28:18,576 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) [2022-03-20 07:28:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 2876 transitions. [2022-03-20 07:28:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 757 [2022-03-20 07:28:18,581 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:18,582 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] [2022-03-20 07:28:18,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 07:28:18,582 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1249705316, now seen corresponding path program 1 times [2022-03-20 07:28:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:18,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029829509] [2022-03-20 07:28:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:18,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 2953 proven. 0 refuted. 0 times theorem prover too weak. 3223 trivial. 0 not checked. [2022-03-20 07:28:18,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:18,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029829509] [2022-03-20 07:28:18,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029829509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:18,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:18,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:18,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920984864] [2022-03-20 07:28:18,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:18,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:18,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:18,666 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) [2022-03-20 07:28:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:18,860 INFO L93 Difference]: Finished difference Result 2419 states and 3134 transitions. [2022-03-20 07:28:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:18,860 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 [2022-03-20 07:28:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:18,872 INFO L225 Difference]: With dead ends: 2419 [2022-03-20 07:28:18,872 INFO L226 Difference]: Without dead ends: 2419 [2022-03-20 07:28:18,872 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 [2022-03-20 07:28:18,873 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 [2022-03-20 07:28:18,873 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] [2022-03-20 07:28:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2022-03-20 07:28:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2407. [2022-03-20 07:28:18,905 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) [2022-03-20 07:28:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3122 transitions. [2022-03-20 07:28:18,910 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3122 transitions. Word has length 756 [2022-03-20 07:28:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:18,910 INFO L478 AbstractCegarLoop]: Abstraction has 2407 states and 3122 transitions. [2022-03-20 07:28:18,911 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) [2022-03-20 07:28:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3122 transitions. [2022-03-20 07:28:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2022-03-20 07:28:18,920 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:18,921 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] [2022-03-20 07:28:18,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 07:28:18,921 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ERRErr0ASSERT_VIOLATIONERROR_FUNCTION === [ERRErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:18,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:18,921 INFO L85 PathProgramCache]: Analyzing trace with hash -783438281, now seen corresponding path program 1 times [2022-03-20 07:28:18,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:18,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401073889] [2022-03-20 07:28:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:18,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:19,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8111 backedges. 4746 proven. 26 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2022-03-20 07:28:19,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401073889] [2022-03-20 07:28:19,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401073889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 07:28:19,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692574671] [2022-03-20 07:28:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:19,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:28:19,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:28:19,046 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) [2022-03-20 07:28:19,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 07:28:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:19,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1330 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 07:28:19,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:28:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8111 backedges. 4746 proven. 26 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2022-03-20 07:28:20,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:28:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8111 backedges. 4746 proven. 26 refuted. 0 times theorem prover too weak. 3339 trivial. 0 not checked. [2022-03-20 07:28:20,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692574671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 07:28:20,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 07:28:20,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-20 07:28:20,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368908662] [2022-03-20 07:28:20,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 07:28:20,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 07:28:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:20,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 07:28:20,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-20 07:28:20,929 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) [2022-03-20 07:28:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:21,542 INFO L93 Difference]: Finished difference Result 1817 states and 2370 transitions. [2022-03-20 07:28:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 07:28:21,543 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 [2022-03-20 07:28:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:21,543 INFO L225 Difference]: With dead ends: 1817 [2022-03-20 07:28:21,543 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 07:28:21,544 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 [2022-03-20 07:28:21,544 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 [2022-03-20 07:28:21,544 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] [2022-03-20 07:28:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 07:28:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 07:28:21,545 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) [2022-03-20 07:28:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 07:28:21,545 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 855 [2022-03-20 07:28:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:21,545 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 07:28:21,545 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) [2022-03-20 07:28:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 07:28:21,545 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 07:28:21,547 INFO L788 garLoopResultBuilder]: Registering result SAFE for location ERRErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 07:28:21,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 07:28:21,755 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 [2022-03-20 07:28:21,758 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] [2022-03-20 07:28:21,758 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 07:28:21,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:28:21 BasicIcfg [2022-03-20 07:28:21,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 07:28:21,760 INFO L158 Benchmark]: Toolchain (without parser) took 13379.93ms. Allocated memory was 198.2MB in the beginning and 354.4MB in the end (delta: 156.2MB). Free memory was 147.0MB in the beginning and 173.5MB in the end (delta: -26.5MB). Peak memory consumption was 129.0MB. Max. memory is 8.0GB. [2022-03-20 07:28:21,760 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 163.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 07:28:21,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 289.43ms. Allocated memory is still 198.2MB. Free memory was 146.9MB in the beginning and 169.1MB in the end (delta: -22.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 07:28:21,761 INFO L158 Benchmark]: Boogie Preprocessor took 40.89ms. Allocated memory is still 198.2MB. Free memory was 169.1MB in the beginning and 166.8MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-20 07:28:21,761 INFO L158 Benchmark]: RCFGBuilder took 564.67ms. Allocated memory is still 198.2MB. Free memory was 166.8MB in the beginning and 139.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-03-20 07:28:21,761 INFO L158 Benchmark]: IcfgTransformer took 43.66ms. Allocated memory is still 198.2MB. Free memory was 139.5MB in the beginning and 136.4MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-20 07:28:21,761 INFO L158 Benchmark]: TraceAbstraction took 12435.37ms. Allocated memory was 198.2MB in the beginning and 354.4MB in the end (delta: 156.2MB). Free memory was 135.8MB in the beginning and 173.5MB in the end (delta: -37.7MB). Peak memory consumption was 119.4MB. Max. memory is 8.0GB. [2022-03-20 07:28:21,762 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 198.2MB. Free memory is still 163.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 289.43ms. Allocated memory is still 198.2MB. Free memory was 146.9MB in the beginning and 169.1MB in the end (delta: -22.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.89ms. Allocated memory is still 198.2MB. Free memory was 169.1MB in the beginning and 166.8MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 564.67ms. Allocated memory is still 198.2MB. Free memory was 166.8MB in the beginning and 139.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * IcfgTransformer took 43.66ms. Allocated memory is still 198.2MB. Free memory was 139.5MB in the beginning and 136.4MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * TraceAbstraction took 12435.37ms. Allocated memory was 198.2MB in the beginning and 354.4MB in the end (delta: 156.2MB). Free memory was 135.8MB in the beginning and 173.5MB in the end (delta: -37.7MB). Peak memory consumption was 119.4MB. 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: 12.4s, OverallIterations: 21, TraceHistogramMax: 26, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5988 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5986 mSDsluCounter, 5875 SdHoareTripleChecker+Invalid, 3.4s 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: 0.5s 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! [2022-03-20 07:28:21,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...