/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/hard-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 17:14:22,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 17:14:22,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 17:14:22,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 17:14:22,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 17:14:22,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 17:14:22,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 17:14:22,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 17:14:22,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 17:14:22,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 17:14:22,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 17:14:22,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 17:14:22,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 17:14:22,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 17:14:22,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 17:14:22,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 17:14:22,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 17:14:22,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 17:14:22,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 17:14:22,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 17:14:22,760 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 17:14:22,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 17:14:22,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 17:14:22,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 17:14:22,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 17:14:22,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 17:14:22,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 17:14:22,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 17:14:22,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 17:14:22,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 17:14:22,788 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 17:14:22,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 17:14:22,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 17:14:22,790 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 17:14:22,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 17:14:22,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 17:14:22,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 17:14:22,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 17:14:22,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 17:14:22,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 17:14:22,791 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 17:14:22,791 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 17:14:22,791 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 17:14:22,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 17:14:22,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 17:14:22,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 17:14:22,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 17:14:22,792 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 17:14:22,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:14:22,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 17:14:22,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 17:14:22,792 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 17:14:22,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 17:14:22,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 17:14:22,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 17:14:22,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 17:14:22,978 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 17:14:22,979 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 17:14:22,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2022-03-17 17:14:23,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9476759a3/0aa36c50e077434e9fcfe47e4646be69/FLAG68ca5e648 [2022-03-17 17:14:23,397 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 17:14:23,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2022-03-17 17:14:23,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9476759a3/0aa36c50e077434e9fcfe47e4646be69/FLAG68ca5e648 [2022-03-17 17:14:23,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9476759a3/0aa36c50e077434e9fcfe47e4646be69 [2022-03-17 17:14:23,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 17:14:23,788 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 17:14:23,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 17:14:23,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 17:14:23,796 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 17:14:23,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:14:23" (1/1) ... [2022-03-17 17:14:23,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbe3651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:23, skipping insertion in model container [2022-03-17 17:14:23,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:14:23" (1/1) ... [2022-03-17 17:14:23,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 17:14:23,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 17:14:23,967 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/hard-ll_valuebound1.c[538,551] [2022-03-17 17:14:23,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:14:24,027 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 17:14:24,043 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/hard-ll_valuebound1.c[538,551] [2022-03-17 17:14:24,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:14:24,074 INFO L208 MainTranslator]: Completed translation [2022-03-17 17:14:24,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24 WrapperNode [2022-03-17 17:14:24,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 17:14:24,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 17:14:24,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 17:14:24,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 17:14:24,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 17:14:24,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 17:14:24,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 17:14:24,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 17:14:24,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:14:24,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:24,145 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) [2022-03-17 17:14:24,167 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 [2022-03-17 17:14:24,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 17:14:24,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 17:14:24,178 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 17:14:24,178 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 17:14:24,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 17:14:24,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 17:14:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 17:14:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 17:14:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 17:14:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 17:14:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 17:14:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 17:14:24,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 17:14:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 17:14:24,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 17:14:24,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 17:14:24,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 17:14:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 17:14:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 17:14:24,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 17:14:24,226 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 17:14:24,227 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 17:14:24,362 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 17:14:24,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 17:14:24,366 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 17:14:24,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:14:24 BoogieIcfgContainer [2022-03-17 17:14:24,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 17:14:24,368 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 17:14:24,368 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 17:14:24,377 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 17:14:24,380 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:14:24" (1/1) ... [2022-03-17 17:14:24,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:14:24 BasicIcfg [2022-03-17 17:14:24,411 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 17:14:24,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 17:14:24,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 17:14:24,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 17:14:24,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 05:14:23" (1/4) ... [2022-03-17 17:14:24,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7bf47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:14:24, skipping insertion in model container [2022-03-17 17:14:24,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:14:24" (2/4) ... [2022-03-17 17:14:24,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7bf47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:14:24, skipping insertion in model container [2022-03-17 17:14:24,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:14:24" (3/4) ... [2022-03-17 17:14:24,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7bf47a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:14:24, skipping insertion in model container [2022-03-17 17:14:24,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:14:24" (4/4) ... [2022-03-17 17:14:24,419 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound1.cJordan [2022-03-17 17:14:24,423 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 17:14:24,423 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 17:14:24,458 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 17:14:24,464 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 [2022-03-17 17:14:24,464 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 17:14:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 17:14:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 17:14:24,482 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:24,482 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:14:24,483 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:24,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2022-03-17 17:14:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:24,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61258922] [2022-03-17 17:14:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:14:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:14:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 17:14:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 17:14:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:14:24,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:24,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61258922] [2022-03-17 17:14:24,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61258922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:14:24,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:14:24,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 17:14:24,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012928329] [2022-03-17 17:14:24,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:14:24,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 17:14:24,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 17:14:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:14:24,743 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:14:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:24,822 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-03-17 17:14:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 17:14:24,824 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 17:14:24,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:24,831 INFO L225 Difference]: With dead ends: 38 [2022-03-17 17:14:24,831 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 17:14:24,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:14:24,835 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:24,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:14:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 17:14:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-17 17:14:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 17:14:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-17 17:14:24,862 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-17 17:14:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:24,863 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-17 17:14:24,863 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 17:14:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-17 17:14:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 17:14:24,865 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:24,865 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:14:24,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 17:14:24,866 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2022-03-17 17:14:24,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:24,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482729903] [2022-03-17 17:14:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:24,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:14:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:14:24,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 17:14:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 17:14:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:14:24,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:24,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482729903] [2022-03-17 17:14:24,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482729903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:14:24,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:14:24,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:14:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416188208] [2022-03-17 17:14:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:14:24,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:14:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:14:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:14:24,979 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 17:14:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:25,142 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-03-17 17:14:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 17:14:25,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-17 17:14:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:25,144 INFO L225 Difference]: With dead ends: 44 [2022-03-17 17:14:25,144 INFO L226 Difference]: Without dead ends: 44 [2022-03-17 17:14:25,144 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:14:25,145 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:25,145 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:14:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-17 17:14:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-17 17:14:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 17:14:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-17 17:14:25,151 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-17 17:14:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:25,152 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-17 17:14:25,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-17 17:14:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-17 17:14:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 17:14:25,152 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:25,153 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:14:25,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 17:14:25,153 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:25,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2022-03-17 17:14:25,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:25,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491007643] [2022-03-17 17:14:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:25,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:25,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:14:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:25,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:14:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:25,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 17:14:25,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:25,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 17:14:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:25,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-17 17:14:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:14:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491007643] [2022-03-17 17:14:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491007643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:14:25,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:14:25,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:14:25,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786380758] [2022-03-17 17:14:25,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:14:25,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:14:25,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:14:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:14:25,230 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:14:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:25,408 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-03-17 17:14:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 17:14:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2022-03-17 17:14:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:25,409 INFO L225 Difference]: With dead ends: 48 [2022-03-17 17:14:25,409 INFO L226 Difference]: Without dead ends: 48 [2022-03-17 17:14:25,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:14:25,411 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:25,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:14:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-17 17:14:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-17 17:14:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 17:14:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-17 17:14:25,416 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-17 17:14:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:25,416 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-17 17:14:25,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:14:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-17 17:14:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 17:14:25,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:25,417 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 17:14:25,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 17:14:25,417 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:25,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2022-03-17 17:14:25,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:25,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710794803] [2022-03-17 17:14:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:25,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:25,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:25,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845416298] [2022-03-17 17:14:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:25,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:25,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:25,451 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) [2022-03-17 17:14:25,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 17:14:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 17:14:25,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-17 17:14:25,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:14:25,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:25,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710794803] [2022-03-17 17:14:25,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:25,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845416298] [2022-03-17 17:14:25,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845416298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:14:25,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:14:25,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-17 17:14:25,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666909124] [2022-03-17 17:14:25,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:14:25,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 17:14:25,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 17:14:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:14:25,755 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 17:14:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:25,853 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2022-03-17 17:14:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 17:14:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2022-03-17 17:14:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:25,857 INFO L225 Difference]: With dead ends: 56 [2022-03-17 17:14:25,857 INFO L226 Difference]: Without dead ends: 55 [2022-03-17 17:14:25,858 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:14:25,864 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:25,865 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 225 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:14:25,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-17 17:14:25,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-17 17:14:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 17:14:25,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-17 17:14:25,874 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-17 17:14:25,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:25,875 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-17 17:14:25,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 17:14:25,875 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-17 17:14:25,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 17:14:25,876 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:25,876 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:14:25,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 17:14:26,076 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 [2022-03-17 17:14:26,077 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2022-03-17 17:14:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852074848] [2022-03-17 17:14:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:26,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:26,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:26,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766040547] [2022-03-17 17:14:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:26,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:26,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:26,088 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) [2022-03-17 17:14:26,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 17:14:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 17:14:26,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 17:14:26,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:14:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 17:14:26,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:26,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852074848] [2022-03-17 17:14:26,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:26,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766040547] [2022-03-17 17:14:26,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766040547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:14:26,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:14:26,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-03-17 17:14:26,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425545210] [2022-03-17 17:14:26,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:14:26,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 17:14:26,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 17:14:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 17:14:26,669 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-17 17:14:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:26,835 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-03-17 17:14:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 17:14:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2022-03-17 17:14:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:26,837 INFO L225 Difference]: With dead ends: 74 [2022-03-17 17:14:26,837 INFO L226 Difference]: Without dead ends: 69 [2022-03-17 17:14:26,837 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-17 17:14:26,837 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:26,838 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 232 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:14:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-17 17:14:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-03-17 17:14:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-17 17:14:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-03-17 17:14:26,842 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 45 [2022-03-17 17:14:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:26,843 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-03-17 17:14:26,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-17 17:14:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-03-17 17:14:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-17 17:14:26,844 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:26,844 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-03-17 17:14:26,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 17:14:27,061 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 [2022-03-17 17:14:27,061 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:27,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2022-03-17 17:14:27,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:27,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266291617] [2022-03-17 17:14:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:27,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:27,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:27,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21090249] [2022-03-17 17:14:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:27,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:27,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:27,071 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) [2022-03-17 17:14:27,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 17:14:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:27,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 17:14:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-17 17:14:27,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:14:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-17 17:14:27,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:27,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266291617] [2022-03-17 17:14:27,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:27,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21090249] [2022-03-17 17:14:27,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21090249] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:14:27,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:14:27,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-17 17:14:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40076090] [2022-03-17 17:14:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:14:27,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:14:27,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:14:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:14:27,438 INFO L87 Difference]: Start difference. First operand 67 states and 78 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:14:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:27,475 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-03-17 17:14:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:14:27,484 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-17 17:14:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:27,485 INFO L225 Difference]: With dead ends: 77 [2022-03-17 17:14:27,485 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 17:14:27,485 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-17 17:14:27,486 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:27,486 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:14:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 17:14:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-03-17 17:14:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 17:14:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-03-17 17:14:27,491 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 55 [2022-03-17 17:14:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:27,491 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-03-17 17:14:27,491 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:14:27,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-03-17 17:14:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-17 17:14:27,492 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:27,492 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2022-03-17 17:14:27,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 17:14:27,711 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 [2022-03-17 17:14:27,712 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash -920366345, now seen corresponding path program 1 times [2022-03-17 17:14:27,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:27,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355357203] [2022-03-17 17:14:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:27,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:27,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:27,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882382323] [2022-03-17 17:14:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:27,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:27,741 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) [2022-03-17 17:14:27,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 17:14:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:27,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 17:14:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-17 17:14:27,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:14:27,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:28,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355357203] [2022-03-17 17:14:28,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:28,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882382323] [2022-03-17 17:14:28,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882382323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:14:28,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:14:28,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 17:14:28,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139427260] [2022-03-17 17:14:28,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:14:28,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 17:14:28,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:28,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 17:14:28,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:14:28,023 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-17 17:14:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:28,052 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-03-17 17:14:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 17:14:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2022-03-17 17:14:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:28,054 INFO L225 Difference]: With dead ends: 75 [2022-03-17 17:14:28,054 INFO L226 Difference]: Without dead ends: 75 [2022-03-17 17:14:28,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-17 17:14:28,055 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:28,055 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 111 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:14:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-17 17:14:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-17 17:14:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 17:14:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2022-03-17 17:14:28,060 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 73 [2022-03-17 17:14:28,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:28,061 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2022-03-17 17:14:28,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-03-17 17:14:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2022-03-17 17:14:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 17:14:28,062 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:28,062 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-17 17:14:28,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 17:14:28,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:28,265 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1689231171, now seen corresponding path program 1 times [2022-03-17 17:14:28,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:28,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963883751] [2022-03-17 17:14:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:28,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:28,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120688119] [2022-03-17 17:14:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:28,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:28,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:28,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:14:28,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 17:14:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:28,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-17 17:14:28,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-17 17:14:29,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:14:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-17 17:14:31,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:31,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963883751] [2022-03-17 17:14:31,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:31,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120688119] [2022-03-17 17:14:31,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120688119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:14:31,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:14:31,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-03-17 17:14:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524245386] [2022-03-17 17:14:31,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:14:31,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 17:14:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 17:14:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-17 17:14:31,386 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-17 17:14:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:32,366 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-03-17 17:14:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 17:14:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 75 [2022-03-17 17:14:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:32,368 INFO L225 Difference]: With dead ends: 104 [2022-03-17 17:14:32,368 INFO L226 Difference]: Without dead ends: 104 [2022-03-17 17:14:32,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-17 17:14:32,369 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:32,369 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 289 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 17:14:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-17 17:14:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2022-03-17 17:14:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-17 17:14:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2022-03-17 17:14:32,374 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 75 [2022-03-17 17:14:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:32,374 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2022-03-17 17:14:32,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-17 17:14:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2022-03-17 17:14:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-17 17:14:32,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:32,375 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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] [2022-03-17 17:14:32,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 17:14:32,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:32,592 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:32,592 INFO L85 PathProgramCache]: Analyzing trace with hash -102783885, now seen corresponding path program 1 times [2022-03-17 17:14:32,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:32,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116307949] [2022-03-17 17:14:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:32,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:32,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:32,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125690122] [2022-03-17 17:14:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:32,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:32,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:32,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:14:32,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 17:14:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:32,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-17 17:14:32,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-03-17 17:14:34,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:14:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-17 17:14:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:37,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116307949] [2022-03-17 17:14:37,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:37,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125690122] [2022-03-17 17:14:37,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125690122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:14:37,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:14:37,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-03-17 17:14:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765718775] [2022-03-17 17:14:37,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:14:37,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 17:14:37,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 17:14:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-17 17:14:37,897 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-03-17 17:14:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:42,645 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2022-03-17 17:14:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 17:14:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 86 [2022-03-17 17:14:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:42,647 INFO L225 Difference]: With dead ends: 137 [2022-03-17 17:14:42,647 INFO L226 Difference]: Without dead ends: 137 [2022-03-17 17:14:42,647 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2022-03-17 17:14:42,647 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 61 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:42,648 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 407 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-17 17:14:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-17 17:14:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2022-03-17 17:14:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 74 states have internal predecessors, (82), 31 states have call successors, (31), 16 states have call predecessors, (31), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-17 17:14:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2022-03-17 17:14:42,654 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 86 [2022-03-17 17:14:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:42,654 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2022-03-17 17:14:42,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 12 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-03-17 17:14:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2022-03-17 17:14:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 17:14:42,655 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:42,655 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 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] [2022-03-17 17:14:42,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 17:14:42,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:42,892 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:42,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:42,892 INFO L85 PathProgramCache]: Analyzing trace with hash 966352941, now seen corresponding path program 1 times [2022-03-17 17:14:42,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:42,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332309450] [2022-03-17 17:14:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:42,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:42,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:42,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189904140] [2022-03-17 17:14:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:42,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:42,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:42,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:14:42,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 17:14:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:14:42,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 17:14:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-17 17:14:43,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:14:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-17 17:14:43,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332309450] [2022-03-17 17:14:43,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189904140] [2022-03-17 17:14:43,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189904140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:14:43,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:14:43,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-17 17:14:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665305896] [2022-03-17 17:14:43,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:14:43,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 17:14:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 17:14:43,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:14:43,498 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-17 17:14:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:43,783 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-03-17 17:14:43,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 17:14:43,784 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-03-17 17:14:43,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:43,785 INFO L225 Difference]: With dead ends: 125 [2022-03-17 17:14:43,785 INFO L226 Difference]: Without dead ends: 106 [2022-03-17 17:14:43,786 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:14:43,786 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:43,786 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 282 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 17:14:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-17 17:14:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-17 17:14:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 17:14:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-17 17:14:43,791 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 91 [2022-03-17 17:14:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:43,791 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-17 17:14:43,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-17 17:14:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-17 17:14:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-17 17:14:43,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:43,792 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 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] [2022-03-17 17:14:43,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 17:14:44,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:44,006 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:44,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1448579276, now seen corresponding path program 2 times [2022-03-17 17:14:44,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:44,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476584686] [2022-03-17 17:14:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:44,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:44,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:44,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937188426] [2022-03-17 17:14:44,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:14:44,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:44,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:44,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:14:44,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 17:14:44,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:14:44,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:14:44,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 17:14:44,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 93 proven. 4 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-03-17 17:14:44,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:14:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2022-03-17 17:14:44,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476584686] [2022-03-17 17:14:44,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937188426] [2022-03-17 17:14:44,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937188426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:14:44,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:14:44,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-03-17 17:14:44,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766866477] [2022-03-17 17:14:44,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:14:44,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:14:44,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:44,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:14:44,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:14:44,486 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-17 17:14:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:44,543 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-03-17 17:14:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:14:44,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2022-03-17 17:14:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:44,545 INFO L225 Difference]: With dead ends: 101 [2022-03-17 17:14:44,545 INFO L226 Difference]: Without dead ends: 101 [2022-03-17 17:14:44,545 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:14:44,550 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:44,551 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:14:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-17 17:14:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-17 17:14:44,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 62 states have internal predecessors, (68), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 17:14:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2022-03-17 17:14:44,571 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 108 [2022-03-17 17:14:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:44,572 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2022-03-17 17:14:44,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-17 17:14:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2022-03-17 17:14:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-17 17:14:44,577 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:14:44,577 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:14:44,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-17 17:14:44,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 17:14:44,792 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:14:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:14:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1498631042, now seen corresponding path program 2 times [2022-03-17 17:14:44,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:14:44,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589000282] [2022-03-17 17:14:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:14:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:14:44,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:14:44,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106328124] [2022-03-17 17:14:44,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:14:44,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:44,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:14:44,812 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:14:44,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 17:14:44,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:14:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:14:44,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 17:14:44,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:14:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 234 proven. 21 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-03-17 17:14:45,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:14:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-17 17:14:45,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:14:45,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589000282] [2022-03-17 17:14:45,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:14:45,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106328124] [2022-03-17 17:14:45,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106328124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:14:45,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:14:45,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-17 17:14:45,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866675739] [2022-03-17 17:14:45,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:14:45,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 17:14:45,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:14:45,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 17:14:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-17 17:14:45,444 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-17 17:14:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:14:45,552 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-03-17 17:14:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 17:14:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 116 [2022-03-17 17:14:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:14:45,552 INFO L225 Difference]: With dead ends: 62 [2022-03-17 17:14:45,552 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 17:14:45,553 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-17 17:14:45,553 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:14:45,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 270 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:14:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 17:14:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 17:14:45,553 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) [2022-03-17 17:14:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 17:14:45,554 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 116 [2022-03-17 17:14:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:14:45,554 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 17:14:45,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-03-17 17:14:45,554 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 17:14:45,554 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 17:14:45,556 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 17:14:45,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-17 17:14:45,756 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:14:45,759 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:14:45,759 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 17:14:45,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:14:45 BasicIcfg [2022-03-17 17:14:45,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 17:14:45,761 INFO L158 Benchmark]: Toolchain (without parser) took 21973.10ms. Allocated memory was 176.2MB in the beginning and 339.7MB in the end (delta: 163.6MB). Free memory was 125.3MB in the beginning and 144.3MB in the end (delta: -18.9MB). Peak memory consumption was 143.9MB. Max. memory is 8.0GB. [2022-03-17 17:14:45,761 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 17:14:45,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.47ms. Allocated memory was 176.2MB in the beginning and 235.9MB in the end (delta: 59.8MB). Free memory was 125.2MB in the beginning and 208.9MB in the end (delta: -83.7MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-03-17 17:14:45,762 INFO L158 Benchmark]: Boogie Preprocessor took 34.78ms. Allocated memory is still 235.9MB. Free memory was 208.9MB in the beginning and 207.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 17:14:45,762 INFO L158 Benchmark]: RCFGBuilder took 242.51ms. Allocated memory is still 235.9MB. Free memory was 207.4MB in the beginning and 197.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 17:14:45,762 INFO L158 Benchmark]: IcfgTransformer took 43.88ms. Allocated memory is still 235.9MB. Free memory was 197.0MB in the beginning and 195.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 17:14:45,762 INFO L158 Benchmark]: TraceAbstraction took 21347.53ms. Allocated memory was 235.9MB in the beginning and 339.7MB in the end (delta: 103.8MB). Free memory was 195.3MB in the beginning and 144.3MB in the end (delta: 51.0MB). Peak memory consumption was 155.2MB. Max. memory is 8.0GB. [2022-03-17 17:14:45,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 141.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 297.47ms. Allocated memory was 176.2MB in the beginning and 235.9MB in the end (delta: 59.8MB). Free memory was 125.2MB in the beginning and 208.9MB in the end (delta: -83.7MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.78ms. Allocated memory is still 235.9MB. Free memory was 208.9MB in the beginning and 207.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 242.51ms. Allocated memory is still 235.9MB. Free memory was 207.4MB in the beginning and 197.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 43.88ms. Allocated memory is still 235.9MB. Free memory was 197.0MB in the beginning and 195.7MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 21347.53ms. Allocated memory was 235.9MB in the beginning and 339.7MB in the end (delta: 103.8MB). Free memory was 195.3MB in the beginning and 144.3MB in the end (delta: 51.0MB). Peak memory consumption was 155.2MB. 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: 17]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.3s, OverallIterations: 12, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 366 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 319 mSDsluCounter, 2223 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1718 mSDsCounter, 416 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1314 IncrementalHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 416 mSolverCounterUnsat, 505 mSDtfsCounter, 1314 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1335 GetRequests, 1193 SyntacticMatches, 12 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=9, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 776 NumberOfCodeBlocks, 776 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 1333 ConstructedInterpolants, 0 QuantifiedInterpolants, 7037 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1620 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 19 InterpolantComputations, 6 PerfectInterpolantSequences, 3367/3483 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! [2022-03-17 17:14:45,785 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...