/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 00:29:21,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 00:29:21,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 00:29:21,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 00:29:21,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 00:29:21,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 00:29:21,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 00:29:21,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 00:29:21,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 00:29:21,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 00:29:21,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 00:29:21,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 00:29:21,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 00:29:21,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 00:29:21,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 00:29:21,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 00:29:21,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 00:29:21,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 00:29:21,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 00:29:21,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 00:29:21,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-24 00:29:21,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 00:29:21,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 00:29:21,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-24 00:29:21,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-24 00:29:21,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-24 00:29:21,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-24 00:29:21,580 INFO L138 SettingsManager]: * Use SBE=true [2022-02-24 00:29:21,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 00:29:21,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 00:29:21,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 00:29:21,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 00:29:21,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 00:29:21,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 00:29:21,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 00:29:21,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 00:29:21,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 00:29:21,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 00:29:21,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 00:29:21,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 00:29:21,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:29:21,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 00:29:21,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-24 00:29:21,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-24 00:29:21,583 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-24 00:29:21,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-24 00:29:21,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 00:29:21,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-24 00:29:21,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-24 00:29:21,584 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-24 00:29:21,584 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 00:29:21,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 00:29:21,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 00:29:21,818 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 00:29:21,819 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 00:29:21,819 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 00:29:21,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2022-02-24 00:29:21,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda006625/8361bfda8f1f468c9148e1b11733b03d/FLAGd3d4c8558 [2022-02-24 00:29:22,182 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 00:29:22,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2022-02-24 00:29:22,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda006625/8361bfda8f1f468c9148e1b11733b03d/FLAGd3d4c8558 [2022-02-24 00:29:22,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda006625/8361bfda8f1f468c9148e1b11733b03d [2022-02-24 00:29:22,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 00:29:22,609 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-24 00:29:22,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 00:29:22,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 00:29:22,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 00:29:22,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77654cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22, skipping insertion in model container [2022-02-24 00:29:22,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 00:29:22,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 00:29:22,744 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/sqrt1-ll_unwindbound1.c[520,533] [2022-02-24 00:29:22,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:29:22,782 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 00:29:22,790 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/sqrt1-ll_unwindbound1.c[520,533] [2022-02-24 00:29:22,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:29:22,802 INFO L208 MainTranslator]: Completed translation [2022-02-24 00:29:22,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22 WrapperNode [2022-02-24 00:29:22,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 00:29:22,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 00:29:22,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 00:29:22,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 00:29:22,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 00:29:22,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 00:29:22,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 00:29:22,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 00:29:22,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (1/1) ... [2022-02-24 00:29:22,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:29:22,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:29:22,843 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) [2022-02-24 00:29:22,859 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 [2022-02-24 00:29:22,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 00:29:22,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 00:29:22,872 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 00:29:22,873 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 00:29:22,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 00:29:22,873 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 00:29:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 00:29:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 00:29:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 00:29:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 00:29:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 00:29:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 00:29:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 00:29:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 00:29:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 00:29:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 00:29:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 00:29:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 00:29:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 00:29:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 00:29:22,921 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 00:29:22,922 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 00:29:23,032 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 00:29:23,036 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 00:29:23,036 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 00:29:23,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:29:23 BoogieIcfgContainer [2022-02-24 00:29:23,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 00:29:23,038 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-24 00:29:23,038 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-24 00:29:23,052 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-24 00:29:23,054 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:29:23" (1/1) ... [2022-02-24 00:29:23,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:29:23 BasicIcfg [2022-02-24 00:29:23,067 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-24 00:29:23,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 00:29:23,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 00:29:23,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 00:29:23,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:29:22" (1/4) ... [2022-02-24 00:29:23,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4020057c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:29:23, skipping insertion in model container [2022-02-24 00:29:23,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:29:22" (2/4) ... [2022-02-24 00:29:23,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4020057c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:29:23, skipping insertion in model container [2022-02-24 00:29:23,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:29:23" (3/4) ... [2022-02-24 00:29:23,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4020057c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:29:23, skipping insertion in model container [2022-02-24 00:29:23,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:29:23" (4/4) ... [2022-02-24 00:29:23,075 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound1.cqvasr [2022-02-24 00:29:23,078 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-24 00:29:23,078 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 00:29:23,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 00:29:23,135 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-24 00:29:23,135 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 00:29:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 00:29:23,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 00:29:23,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:29:23,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:29:23,155 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:29:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:29:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2022-02-24 00:29:23,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:29:23,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638067553] [2022-02-24 00:29:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:23,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:29:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:23,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:29:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:29:23,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:29:23,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638067553] [2022-02-24 00:29:23,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638067553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:29:23,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:29:23,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 00:29:23,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355365003] [2022-02-24 00:29:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:29:23,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 00:29:23,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:29:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 00:29:23,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 00:29:23,375 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:29:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:29:23,451 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-02-24 00:29:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 00:29:23,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-24 00:29:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:29:23,466 INFO L225 Difference]: With dead ends: 47 [2022-02-24 00:29:23,467 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 00:29:23,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 00:29:23,473 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:29:23,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:29:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 00:29:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-02-24 00:29:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 00:29:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-02-24 00:29:23,506 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-02-24 00:29:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:29:23,507 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-02-24 00:29:23,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:29:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-02-24 00:29:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 00:29:23,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:29:23,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:29:23,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 00:29:23,508 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:29:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:29:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2022-02-24 00:29:23,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:29:23,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916329012] [2022-02-24 00:29:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:23,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:29:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:23,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:29:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:29:23,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:29:23,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916329012] [2022-02-24 00:29:23,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916329012] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:29:23,609 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:29:23,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:29:23,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223806229] [2022-02-24 00:29:23,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:29:23,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 00:29:23,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:29:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 00:29:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:29:23,616 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:29:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:29:23,698 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-02-24 00:29:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 00:29:23,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 00:29:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:29:23,699 INFO L225 Difference]: With dead ends: 32 [2022-02-24 00:29:23,699 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 00:29:23,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:29:23,704 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:29:23,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:29:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 00:29:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-24 00:29:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 00:29:23,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-02-24 00:29:23,716 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-02-24 00:29:23,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:29:23,716 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-02-24 00:29:23,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:29:23,717 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-02-24 00:29:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 00:29:23,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:29:23,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:29:23,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 00:29:23,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:29:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:29:23,718 INFO L85 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2022-02-24 00:29:23,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:29:23,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714150046] [2022-02-24 00:29:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:23,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:29:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:23,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:29:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:29:23,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:29:23,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714150046] [2022-02-24 00:29:23,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714150046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:29:23,781 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:29:23,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 00:29:23,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892547206] [2022-02-24 00:29:23,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:29:23,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 00:29:23,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:29:23,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 00:29:23,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:29:23,782 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:29:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:29:23,918 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-02-24 00:29:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 00:29:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 00:29:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:29:23,920 INFO L225 Difference]: With dead ends: 36 [2022-02-24 00:29:23,920 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 00:29:23,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-24 00:29:23,921 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:29:23,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:29:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 00:29:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-02-24 00:29:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-24 00:29:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-24 00:29:23,928 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-02-24 00:29:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:29:23,929 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-24 00:29:23,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 00:29:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-24 00:29:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 00:29:23,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:29:23,929 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:29:23,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 00:29:23,930 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:29:23,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:29:23,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1748396925, now seen corresponding path program 1 times [2022-02-24 00:29:23,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:29:23,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667903055] [2022-02-24 00:29:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:23,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:29:23,939 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:29:23,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661345596] [2022-02-24 00:29:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:23,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:29:23,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:29:23,943 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) [2022-02-24 00:29:23,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-24 00:29:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:23,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-24 00:29:23,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:29:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:29:24,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:29:24,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:29:24,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667903055] [2022-02-24 00:29:24,075 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:29:24,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661345596] [2022-02-24 00:29:24,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661345596] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:29:24,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:29:24,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 00:29:24,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57232617] [2022-02-24 00:29:24,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:29:24,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 00:29:24,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:29:24,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 00:29:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:29:24,077 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 00:29:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:29:24,132 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-02-24 00:29:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 00:29:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-02-24 00:29:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:29:24,133 INFO L225 Difference]: With dead ends: 40 [2022-02-24 00:29:24,133 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 00:29:24,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:29:24,134 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:29:24,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:29:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 00:29:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-02-24 00:29:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-24 00:29:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-02-24 00:29:24,140 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-02-24 00:29:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:29:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-02-24 00:29:24,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 00:29:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-02-24 00:29:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 00:29:24,141 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:29:24,141 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:29:24,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-24 00:29:24,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:29:24,349 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:29:24,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:29:24,349 INFO L85 PathProgramCache]: Analyzing trace with hash -214718627, now seen corresponding path program 1 times [2022-02-24 00:29:24,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:29:24,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074092920] [2022-02-24 00:29:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:24,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:29:24,356 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:29:24,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675968872] [2022-02-24 00:29:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:24,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:29:24,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:29:24,358 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) [2022-02-24 00:29:24,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-24 00:29:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-24 00:29:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:29:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-24 00:29:24,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:29:24,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:29:24,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074092920] [2022-02-24 00:29:24,446 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:29:24,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675968872] [2022-02-24 00:29:24,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675968872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:29:24,446 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:29:24,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 00:29:24,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843911064] [2022-02-24 00:29:24,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:29:24,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 00:29:24,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:29:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 00:29:24,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:29:24,447 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 00:29:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:29:24,473 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-02-24 00:29:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 00:29:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-24 00:29:24,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:29:24,474 INFO L225 Difference]: With dead ends: 44 [2022-02-24 00:29:24,474 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 00:29:24,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:29:24,475 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:29:24,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:29:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 00:29:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-24 00:29:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 00:29:24,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-02-24 00:29:24,490 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-02-24 00:29:24,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:29:24,490 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-02-24 00:29:24,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 00:29:24,490 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-02-24 00:29:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 00:29:24,491 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:29:24,491 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:29:24,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-24 00:29:24,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:29:24,714 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:29:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:29:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1697115236, now seen corresponding path program 1 times [2022-02-24 00:29:24,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:29:24,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87726082] [2022-02-24 00:29:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:24,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:29:24,721 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:29:24,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879836232] [2022-02-24 00:29:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:24,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:29:24,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:29:24,723 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) [2022-02-24 00:29:24,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-24 00:29:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-24 00:29:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:29:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 00:29:24,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:29:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-24 00:29:24,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:29:24,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87726082] [2022-02-24 00:29:24,952 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:29:24,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879836232] [2022-02-24 00:29:24,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879836232] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-24 00:29:24,952 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:29:24,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-24 00:29:24,952 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186228484] [2022-02-24 00:29:24,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:29:24,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 00:29:24,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:29:24,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 00:29:24,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-24 00:29:24,953 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 00:29:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:29:24,984 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-02-24 00:29:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 00:29:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-24 00:29:24,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:29:24,986 INFO L225 Difference]: With dead ends: 45 [2022-02-24 00:29:24,986 INFO L226 Difference]: Without dead ends: 43 [2022-02-24 00:29:24,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 00:29:24,988 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:29:24,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:29:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-24 00:29:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-24 00:29:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 00:29:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-02-24 00:29:25,007 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 30 [2022-02-24 00:29:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:29:25,007 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-02-24 00:29:25,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-24 00:29:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-02-24 00:29:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 00:29:25,008 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:29:25,008 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:29:25,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-24 00:29:25,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:29:25,212 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:29:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:29:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1534643651, now seen corresponding path program 1 times [2022-02-24 00:29:25,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:29:25,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571799435] [2022-02-24 00:29:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:29:25,221 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:29:25,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932416804] [2022-02-24 00:29:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:29:25,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:29:25,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:29:25,226 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) [2022-02-24 00:29:25,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-24 00:29:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:29:25,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-24 00:29:25,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:29:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-24 00:29:25,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:29:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-24 00:29:25,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:29:25,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571799435] [2022-02-24 00:29:25,453 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:29:25,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932416804] [2022-02-24 00:29:25,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932416804] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:29:25,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:29:25,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-24 00:29:25,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932911686] [2022-02-24 00:29:25,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:29:25,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 00:29:25,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:29:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 00:29:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-24 00:29:25,464 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-24 00:29:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:29:25,578 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-02-24 00:29:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 00:29:25,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2022-02-24 00:29:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:29:25,579 INFO L225 Difference]: With dead ends: 52 [2022-02-24 00:29:25,579 INFO L226 Difference]: Without dead ends: 0 [2022-02-24 00:29:25,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-24 00:29:25,580 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:29:25,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 118 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:29:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-24 00:29:25,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-24 00:29:25,581 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) [2022-02-24 00:29:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-24 00:29:25,581 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-02-24 00:29:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:29:25,581 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-24 00:29:25,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-24 00:29:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-24 00:29:25,581 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-24 00:29:25,583 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 00:29:25,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-24 00:29:25,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:29:25,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-02-24 00:29:25,940 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-02-24 00:29:25,940 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-02-24 00:29:25,940 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-02-24 00:29:25,940 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-02-24 00:29:25,940 INFO L854 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2022-02-24 00:29:25,940 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-02-24 00:29:25,940 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-02-24 00:29:25,941 INFO L854 garLoopResultBuilder]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 0) (not (= |old(~counter~0)| 0))) [2022-02-24 00:29:25,941 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-02-24 00:29:25,941 INFO L854 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-02-24 00:29:25,941 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-02-24 00:29:25,941 INFO L854 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-02-24 00:29:25,941 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-02-24 00:29:25,941 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (and (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2022-02-24 00:29:25,941 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-02-24 00:29:25,941 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-02-24 00:29:25,941 INFO L854 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-02-24 00:29:25,941 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2022-02-24 00:29:25,941 INFO L858 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-02-24 00:29:25,941 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2022-02-24 00:29:25,941 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-02-24 00:29:25,942 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-02-24 00:29:25,942 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-02-24 00:29:25,942 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-02-24 00:29:25,942 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-02-24 00:29:25,942 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-02-24 00:29:25,944 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:29:25,945 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 00:29:25,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:29:25 BasicIcfg [2022-02-24 00:29:25,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 00:29:25,954 INFO L158 Benchmark]: Toolchain (without parser) took 3345.20ms. Allocated memory was 170.9MB in the beginning and 231.7MB in the end (delta: 60.8MB). Free memory was 112.8MB in the beginning and 130.9MB in the end (delta: -18.2MB). Peak memory consumption was 41.7MB. Max. memory is 8.0GB. [2022-02-24 00:29:25,954 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 170.9MB. Free memory is still 128.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 00:29:25,954 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.23ms. Allocated memory was 170.9MB in the beginning and 231.7MB in the end (delta: 60.8MB). Free memory was 112.5MB in the beginning and 204.0MB in the end (delta: -91.5MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. [2022-02-24 00:29:25,955 INFO L158 Benchmark]: Boogie Preprocessor took 17.80ms. Allocated memory is still 231.7MB. Free memory was 204.0MB in the beginning and 202.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 00:29:25,955 INFO L158 Benchmark]: RCFGBuilder took 214.89ms. Allocated memory is still 231.7MB. Free memory was 202.5MB in the beginning and 191.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-24 00:29:25,955 INFO L158 Benchmark]: IcfgTransformer took 29.63ms. Allocated memory is still 231.7MB. Free memory was 191.5MB in the beginning and 189.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 00:29:25,955 INFO L158 Benchmark]: TraceAbstraction took 2884.99ms. Allocated memory is still 231.7MB. Free memory was 189.4MB in the beginning and 130.9MB in the end (delta: 58.4MB). Peak memory consumption was 59.5MB. Max. memory is 8.0GB. [2022-02-24 00:29:25,956 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 170.9MB. Free memory is still 128.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 191.23ms. Allocated memory was 170.9MB in the beginning and 231.7MB in the end (delta: 60.8MB). Free memory was 112.5MB in the beginning and 204.0MB in the end (delta: -91.5MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.80ms. Allocated memory is still 231.7MB. Free memory was 204.0MB in the beginning and 202.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 214.89ms. Allocated memory is still 231.7MB. Free memory was 202.5MB in the beginning and 191.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 29.63ms. Allocated memory is still 231.7MB. Free memory was 191.5MB in the beginning and 189.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 2884.99ms. Allocated memory is still 231.7MB. Free memory was 189.4MB in the beginning and 130.9MB in the end (delta: 58.4MB). Peak memory consumption was 59.5MB. 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: 14]: 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 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.8s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 74 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 60 mSDsluCounter, 550 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 364 mSDsCounter, 64 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 285 IncrementalHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 64 mSolverCounterUnsat, 186 mSDtfsCounter, 285 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, InterpolantAutomatonStates: 39, 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, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 38 PreInvPairs, 59 NumberOfFragments, 205 HoareAnnotationTreeSize, 38 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 480 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 195 ConstructedInterpolants, 0 QuantifiedInterpolants, 700 SizeOfPredicates, 5 NumberOfNonLiveVariables, 398 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 112/118 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 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (t + s == a * 4 + 2 + a * a && t == a * 2 + 1) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! [2022-02-24 00:29:25,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...