/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/nla-digbench-scaling/dijkstra-u_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 06:08:58,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 06:08:58,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 06:08:58,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 06:08:58,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 06:08:58,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 06:08:58,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 06:08:58,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 06:08:58,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 06:08:58,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 06:08:58,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 06:08:58,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 06:08:58,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 06:08:58,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 06:08:58,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 06:08:58,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 06:08:58,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 06:08:58,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 06:08:58,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 06:08:58,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 06:08:58,113 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 06:08:58,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 06:08:58,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 06:08:58,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 06:08:58,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 06:08:58,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 06:08:58,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-06 06:08:58,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-06 06:08:58,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-06 06:08:58,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-06 06:08:58,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-06 06:08:58,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-06 06:08:58,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-06 06:08:58,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-06 06:08:58,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 06:08:58,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 06:08:58,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 06:08:58,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 06:08:58,134 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 06:08:58,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 06:08:58,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 06:08:58,135 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 06:08:58,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 06:08:58,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 06:08:58,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 06:08:58,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 06:08:58,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 06:08:58,136 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 06:08:58,136 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 06:08:58,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 06:08:58,136 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 06:08:58,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 06:08:58,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 06:08:58,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 06:08:58,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 06:08:58,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 06:08:58,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:08:58,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 06:08:58,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 06:08:58,138 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 06:08:58,138 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 06:08:58,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 06:08:58,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 06:08:58,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 06:08:58,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 06:08:58,326 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 06:08:58,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2022-04-06 06:08:58,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007c3da27/2e51ecf5f9c74e02856fd7584e61df6d/FLAG4e7f9d8fb [2022-04-06 06:08:58,724 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 06:08:58,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2022-04-06 06:08:58,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007c3da27/2e51ecf5f9c74e02856fd7584e61df6d/FLAG4e7f9d8fb [2022-04-06 06:08:59,148 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/007c3da27/2e51ecf5f9c74e02856fd7584e61df6d [2022-04-06 06:08:59,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 06:08:59,150 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 06:08:59,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 06:08:59,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 06:08:59,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 06:08:59,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38abf3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59, skipping insertion in model container [2022-04-06 06:08:59,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 06:08:59,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 06:08:59,279 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c[525,538] [2022-04-06 06:08:59,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:08:59,321 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 06:08:59,330 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c[525,538] [2022-04-06 06:08:59,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 06:08:59,350 INFO L208 MainTranslator]: Completed translation [2022-04-06 06:08:59,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59 WrapperNode [2022-04-06 06:08:59,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 06:08:59,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 06:08:59,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 06:08:59,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 06:08:59,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 06:08:59,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 06:08:59,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 06:08:59,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 06:08:59,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 06:08:59,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:08:59,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 06:08:59,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 06:08:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 06:08:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 06:08:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 06:08:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 06:08:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 06:08:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 06:08:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 06:08:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 06:08:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 06:08:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 06:08:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 06:08:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 06:08:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 06:08:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 06:08:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 06:08:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 06:08:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 06:08:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 06:08:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 06:08:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 06:08:59,473 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 06:08:59,474 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 06:08:59,617 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 06:08:59,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 06:08:59,621 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 06:08:59,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:59 BoogieIcfgContainer [2022-04-06 06:08:59,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 06:08:59,622 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 06:08:59,623 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 06:08:59,623 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 06:08:59,625 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:59" (1/1) ... [2022-04-06 06:08:59,626 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 06:08:59,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:59 BasicIcfg [2022-04-06 06:08:59,647 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 06:08:59,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 06:08:59,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 06:08:59,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 06:08:59,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:08:59" (1/4) ... [2022-04-06 06:08:59,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd65c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:59, skipping insertion in model container [2022-04-06 06:08:59,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:08:59" (2/4) ... [2022-04-06 06:08:59,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd65c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:08:59, skipping insertion in model container [2022-04-06 06:08:59,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:08:59" (3/4) ... [2022-04-06 06:08:59,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd65c55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:08:59, skipping insertion in model container [2022-04-06 06:08:59,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 06:08:59" (4/4) ... [2022-04-06 06:08:59,651 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.cJordan [2022-04-06 06:08:59,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 06:08:59,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 06:08:59,681 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 06:08:59,686 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 06:08:59,686 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 06:08:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 06:08:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 06:08:59,700 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:08:59,700 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:08:59,700 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:08:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:08:59,704 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-04-06 06:08:59,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:08:59,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174964707] [2022-04-06 06:08:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:08:59,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:08:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:59,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:08:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:59,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:08:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:59,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:08:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:08:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:08:59,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:08:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174964707] [2022-04-06 06:08:59,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174964707] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:08:59,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:08:59,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 06:08:59,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188597772] [2022-04-06 06:08:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:08:59,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 06:08:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:08:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 06:08:59,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:08:59,886 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:09:01,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:02,137 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-04-06 06:09:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 06:09:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 06:09:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:02,143 INFO L225 Difference]: With dead ends: 38 [2022-04-06 06:09:02,144 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 06:09:02,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 06:09:02,149 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:02,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 06:09:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 06:09:02,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 06:09:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 06:09:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-04-06 06:09:02,188 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-04-06 06:09:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:02,189 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-04-06 06:09:02,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 06:09:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-04-06 06:09:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 06:09:02,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:02,191 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:09:02,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 06:09:02,192 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-04-06 06:09:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:02,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640403830] [2022-04-06 06:09:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:02,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:09:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:02,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:09:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:02,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:09:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 06:09:02,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:02,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640403830] [2022-04-06 06:09:02,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640403830] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:02,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:02,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 06:09:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647446180] [2022-04-06 06:09:02,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:02,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 06:09:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 06:09:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:09:02,496 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:09:04,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:06,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:08,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:10,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:12,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:14,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:16,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:18,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:20,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:22,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:26,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:30,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:30,978 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-04-06 06:09:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 06:09:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-04-06 06:09:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:30,980 INFO L225 Difference]: With dead ends: 44 [2022-04-06 06:09:30,980 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 06:09:30,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:09:30,981 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 26 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:30,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 57 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 165 Invalid, 11 Unknown, 0 Unchecked, 28.4s Time] [2022-04-06 06:09:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 06:09:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-04-06 06:09:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 06:09:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-04-06 06:09:30,990 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2022-04-06 06:09:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:30,990 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-04-06 06:09:30,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:09:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-04-06 06:09:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 06:09:30,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:30,991 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 06:09:30,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 06:09:30,991 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-04-06 06:09:30,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:30,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553727987] [2022-04-06 06:09:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:30,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:31,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 06:09:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:31,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 06:09:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:31,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 06:09:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 06:09:31,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:31,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553727987] [2022-04-06 06:09:31,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553727987] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:31,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:31,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 06:09:31,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105766102] [2022-04-06 06:09:31,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:31,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 06:09:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 06:09:31,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 06:09:31,109 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:09:34,653 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:36,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:38,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:43,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-06 06:09:46,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:46,835 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2022-04-06 06:09:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 06:09:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-04-06 06:09:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:46,837 INFO L225 Difference]: With dead ends: 68 [2022-04-06 06:09:46,837 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 06:09:46,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 06:09:46,838 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 69 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:46,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 53 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 235 Invalid, 4 Unknown, 0 Unchecked, 15.7s Time] [2022-04-06 06:09:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 06:09:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-04-06 06:09:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 28 states have call successors, (28), 6 states have call predecessors, (28), 5 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 06:09:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 91 transitions. [2022-04-06 06:09:46,846 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 91 transitions. Word has length 26 [2022-04-06 06:09:46,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:46,846 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 91 transitions. [2022-04-06 06:09:46,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 06:09:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 91 transitions. [2022-04-06 06:09:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 06:09:46,847 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:46,847 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 06:09:46,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 06:09:46,847 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:46,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-04-06 06:09:46,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:46,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314402669] [2022-04-06 06:09:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:46,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:46,870 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:46,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263608451] [2022-04-06 06:09:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:46,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:46,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:46,882 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:09:46,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 06:09:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 06:09:46,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 06:09:47,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:09:47,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:47,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314402669] [2022-04-06 06:09:47,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:09:47,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263608451] [2022-04-06 06:09:47,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263608451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:47,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:47,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:09:47,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241668226] [2022-04-06 06:09:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:47,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:09:47,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:09:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:09:47,088 INFO L87 Difference]: Start difference. First operand 64 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:09:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:47,592 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2022-04-06 06:09:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:09:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 06:09:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:47,593 INFO L225 Difference]: With dead ends: 80 [2022-04-06 06:09:47,593 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 06:09:47,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:09:47,594 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:47,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 147 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 06:09:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 06:09:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-04-06 06:09:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 06:09:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2022-04-06 06:09:47,603 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 34 [2022-04-06 06:09:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:47,604 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2022-04-06 06:09:47,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:09:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2022-04-06 06:09:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 06:09:47,604 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:47,604 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 06:09:47,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 06:09:47,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:47,809 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-04-06 06:09:47,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:47,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454616076] [2022-04-06 06:09:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:47,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:47,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103384692] [2022-04-06 06:09:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:47,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:47,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:47,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:09:47,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 06:09:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:47,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:09:47,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 06:09:47,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:09:47,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:47,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454616076] [2022-04-06 06:09:47,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:09:47,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103384692] [2022-04-06 06:09:47,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103384692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:47,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:47,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:09:47,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954722365] [2022-04-06 06:09:47,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:47,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:09:47,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:47,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:09:47,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:09:47,964 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:09:50,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:50,240 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2022-04-06 06:09:50,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:09:50,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 06:09:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:50,241 INFO L225 Difference]: With dead ends: 90 [2022-04-06 06:09:50,241 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 06:09:50,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:09:50,242 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:50,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 06:09:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 06:09:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-04-06 06:09:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 43 states have (on average 1.186046511627907) internal successors, (51), 47 states have internal predecessors, (51), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 06:09:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2022-04-06 06:09:50,248 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 36 [2022-04-06 06:09:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:50,249 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2022-04-06 06:09:50,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 06:09:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2022-04-06 06:09:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 06:09:50,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:50,250 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2022-04-06 06:09:50,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 06:09:50,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:50,451 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:50,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1303539417, now seen corresponding path program 1 times [2022-04-06 06:09:50,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:50,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740444729] [2022-04-06 06:09:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:50,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:50,460 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:50,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359994939] [2022-04-06 06:09:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:50,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:50,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:50,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:09:50,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 06:09:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 06:09:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 06:09:50,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 06:09:50,685 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 06:09:50,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 06:09:50,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 06:09:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740444729] [2022-04-06 06:09:50,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 06:09:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359994939] [2022-04-06 06:09:50,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359994939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 06:09:50,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 06:09:50,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 06:09:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634966156] [2022-04-06 06:09:50,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 06:09:50,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 06:09:50,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 06:09:50,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 06:09:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 06:09:50,687 INFO L87 Difference]: Start difference. First operand 88 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 06:09:53,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 06:09:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 06:09:53,150 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2022-04-06 06:09:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 06:09:53,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-04-06 06:09:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 06:09:53,152 INFO L225 Difference]: With dead ends: 100 [2022-04-06 06:09:53,152 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 06:09:53,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 06:09:53,153 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 06:09:53,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 132 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 06:09:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 06:09:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-04-06 06:09:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 26 states have call successors, (26), 8 states have call predecessors, (26), 7 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 06:09:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2022-04-06 06:09:53,158 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 60 [2022-04-06 06:09:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 06:09:53,158 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2022-04-06 06:09:53,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 06:09:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2022-04-06 06:09:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 06:09:53,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 06:09:53,159 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-06 06:09:53,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 06:09:53,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:53,376 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 06:09:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 06:09:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-04-06 06:09:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 06:09:53,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412623109] [2022-04-06 06:09:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:53,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 06:09:53,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 06:09:53,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608725057] [2022-04-06 06:09:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 06:09:53,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 06:09:53,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 06:09:53,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 06:09:53,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process