/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:52:22,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:52:22,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:52:22,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 07:52:22,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 07:52:22,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 07:52:22,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 07:52:22,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 07:52:22,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 07:52:22,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 07:52:22,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 07:52:22,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 07:52:22,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:52:22,515 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:52:22,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:52:22,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:52:22,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:52:22,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:52:22,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:52:22,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:52:22,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:52:22,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:52:22,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:52:22,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:52:22,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:52:22,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:52:22,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:52:22,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:52:22,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:52:22,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:52:22,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:52:22,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:52:22,540 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:52:22,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:52:22,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:52:22,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:52:22,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:52:22,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:52:22,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:52:22,540 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:52:22,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:52:22,541 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:52:22,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:52:22,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:52:22,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:52:22,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:52:22,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:52:22,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:52:22,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:52:22,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:52:22,542 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:52:22,542 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:52:22,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:52:22,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:52:22,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:52:22,790 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:52:22,791 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:52:22,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2022-01-31 07:52:22,846 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b780808/b7f6c8ee5e5c47dab581233a54cb5d35/FLAG9309a4f3d [2022-01-31 07:52:23,146 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:52:23,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2022-01-31 07:52:23,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b780808/b7f6c8ee5e5c47dab581233a54cb5d35/FLAG9309a4f3d [2022-01-31 07:52:23,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b780808/b7f6c8ee5e5c47dab581233a54cb5d35 [2022-01-31 07:52:23,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:52:23,573 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:52:23,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:52:23,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:52:23,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:52:23,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cea8886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23, skipping insertion in model container [2022-01-31 07:52:23,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:52:23,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:52:23,694 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i[816,829] [2022-01-31 07:52:23,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:52:23,712 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:52:23,726 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i[816,829] [2022-01-31 07:52:23,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:52:23,778 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:52:23,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23 WrapperNode [2022-01-31 07:52:23,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:52:23,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:52:23,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:52:23,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:52:23,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:52:23,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:52:23,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:52:23,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:52:23,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (1/1) ... [2022-01-31 07:52:23,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:52:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:23,849 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) [2022-01-31 07:52:23,851 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 [2022-01-31 07:52:23,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:52:23,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:52:23,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:52:23,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:52:23,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:52:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:52:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:52:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:52:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:52:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:52:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:52:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:52:23,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:52:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:52:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:52:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:52:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:52:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:52:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:52:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:52:23,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:52:23,973 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:52:23,975 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:52:24,255 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:52:24,260 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:52:24,260 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-31 07:52:24,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:52:24 BoogieIcfgContainer [2022-01-31 07:52:24,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:52:24,263 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:52:24,263 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:52:24,264 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:52:24,267 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:52:24" (1/1) ... [2022-01-31 07:52:24,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:52:24 BasicIcfg [2022-01-31 07:52:24,289 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:52:24,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:52:24,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:52:24,293 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:52:24,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:52:23" (1/4) ... [2022-01-31 07:52:24,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c918155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:52:24, skipping insertion in model container [2022-01-31 07:52:24,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:52:23" (2/4) ... [2022-01-31 07:52:24,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c918155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:52:24, skipping insertion in model container [2022-01-31 07:52:24,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:52:24" (3/4) ... [2022-01-31 07:52:24,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c918155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:52:24, skipping insertion in model container [2022-01-31 07:52:24,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:52:24" (4/4) ... [2022-01-31 07:52:24,297 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.iJordan [2022-01-31 07:52:24,301 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:52:24,301 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:52:24,341 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:52:24,348 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 07:52:24,348 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:52:24,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 43 states have (on average 1.558139534883721) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:52:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 07:52:24,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:24,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:24,382 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:24,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:24,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1517276586, now seen corresponding path program 1 times [2022-01-31 07:52:24,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:24,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336285136] [2022-01-31 07:52:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:24,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:24,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:52:24,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:24,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336285136] [2022-01-31 07:52:24,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336285136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:52:24,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:52:24,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:52:24,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124208334] [2022-01-31 07:52:24,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:52:24,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:52:24,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:24,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:52:24,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:52:24,644 INFO L87 Difference]: Start difference. First operand has 51 states, 43 states have (on average 1.558139534883721) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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) [2022-01-31 07:52:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:24,682 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-01-31 07:52:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:52:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 31 [2022-01-31 07:52:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:24,690 INFO L225 Difference]: With dead ends: 51 [2022-01-31 07:52:24,690 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 07:52:24,691 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 [2022-01-31 07:52:24,695 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 52 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:24,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 63 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:52:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 07:52:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-31 07:52:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-01-31 07:52:24,727 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2022-01-31 07:52:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:24,728 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-01-31 07:52:24,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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) [2022-01-31 07:52:24,728 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-01-31 07:52:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 07:52:24,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:24,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:24,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:52:24,730 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1456084255, now seen corresponding path program 1 times [2022-01-31 07:52:24,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:24,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581806285] [2022-01-31 07:52:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:24,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:24,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:52:24,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:24,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581806285] [2022-01-31 07:52:24,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581806285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:52:24,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:52:24,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:52:24,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126604977] [2022-01-31 07:52:24,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:52:24,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:52:24,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:52:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:52:24,864 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-01-31 07:52:24,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:24,953 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-31 07:52:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:52:24,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 31 [2022-01-31 07:52:24,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:24,954 INFO L225 Difference]: With dead ends: 48 [2022-01-31 07:52:24,954 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 07:52:24,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:52:24,956 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 51 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:24,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 60 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:52:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 07:52:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-01-31 07:52:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:24,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-01-31 07:52:24,961 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2022-01-31 07:52:24,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:24,962 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-01-31 07:52:24,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-01-31 07:52:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-01-31 07:52:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 07:52:24,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:24,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:24,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:52:24,970 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:24,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:24,970 INFO L85 PathProgramCache]: Analyzing trace with hash -75201347, now seen corresponding path program 1 times [2022-01-31 07:52:24,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:24,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518344369] [2022-01-31 07:52:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:24,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:25,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:52:25,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:25,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518344369] [2022-01-31 07:52:25,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518344369] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:25,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573317747] [2022-01-31 07:52:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:25,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:25,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:25,052 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) [2022-01-31 07:52:25,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 07:52:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:25,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:52:25,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:52:25,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:52:25,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573317747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:52:25,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:52:25,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 07:52:25,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715685926] [2022-01-31 07:52:25,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:52:25,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:52:25,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:25,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:52:25,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:52:25,233 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:25,291 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-01-31 07:52:25,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:52:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 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 33 [2022-01-31 07:52:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:25,293 INFO L225 Difference]: With dead ends: 65 [2022-01-31 07:52:25,293 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 07:52:25,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 07:52:25,295 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:25,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:52:25,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 07:52:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2022-01-31 07:52:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-01-31 07:52:25,308 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2022-01-31 07:52:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:25,308 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-01-31 07:52:25,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-01-31 07:52:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 07:52:25,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:25,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:25,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 07:52:25,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:25,524 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash -420139093, now seen corresponding path program 1 times [2022-01-31 07:52:25,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:25,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9100083] [2022-01-31 07:52:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:25,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:25,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:25,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9100083] [2022-01-31 07:52:25,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9100083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321424356] [2022-01-31 07:52:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:25,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:25,584 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) [2022-01-31 07:52:25,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 07:52:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:25,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:52:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:25,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:52:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:25,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321424356] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:52:25,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:52:25,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:52:25,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502082480] [2022-01-31 07:52:25,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:52:25,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:52:25,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:25,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:52:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:52:25,851 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:25,954 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-01-31 07:52:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:52:25,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 07:52:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:25,958 INFO L225 Difference]: With dead ends: 62 [2022-01-31 07:52:25,958 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 07:52:25,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:52:25,961 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:25,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 65 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:52:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 07:52:25,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-01-31 07:52:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-01-31 07:52:25,973 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 51 [2022-01-31 07:52:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:25,973 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-01-31 07:52:25,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-01-31 07:52:25,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 07:52:25,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:25,975 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:25,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 07:52:26,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 07:52:26,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:26,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1790992133, now seen corresponding path program 2 times [2022-01-31 07:52:26,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:26,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262195048] [2022-01-31 07:52:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:26,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:26,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 07:52:26,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:26,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262195048] [2022-01-31 07:52:26,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262195048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:26,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200385401] [2022-01-31 07:52:26,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:52:26,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:26,257 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) [2022-01-31 07:52:26,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 07:52:26,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:52:26,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:52:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:52:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:26,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:52:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 07:52:26,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200385401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:52:26,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:52:26,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 07:52:26,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481725965] [2022-01-31 07:52:26,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:52:26,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 07:52:26,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 07:52:26,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 07:52:26,614 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:26,870 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2022-01-31 07:52:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 07:52:26,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 07:52:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:26,873 INFO L225 Difference]: With dead ends: 101 [2022-01-31 07:52:26,873 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 07:52:26,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 07:52:26,874 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 117 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:26,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 57 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:52:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 07:52:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-01-31 07:52:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2022-01-31 07:52:26,890 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 57 [2022-01-31 07:52:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:26,890 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2022-01-31 07:52:26,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2022-01-31 07:52:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 07:52:26,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:26,893 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:26,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 07:52:27,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:27,096 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:27,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash 245489447, now seen corresponding path program 3 times [2022-01-31 07:52:27,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:27,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962884565] [2022-01-31 07:52:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:27,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:27,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 07:52:27,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962884565] [2022-01-31 07:52:27,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962884565] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:27,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602483810] [2022-01-31 07:52:27,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:52:27,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:27,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:27,245 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) [2022-01-31 07:52:27,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 07:52:27,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:52:27,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:52:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 07:52:27,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 07:52:27,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:52:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 07:52:27,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602483810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:52:27,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:52:27,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 07:52:27,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780977366] [2022-01-31 07:52:27,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:52:27,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 07:52:27,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:27,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 07:52:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 07:52:27,671 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 19 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:28,188 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2022-01-31 07:52:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 07:52:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 19 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 07:52:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:28,189 INFO L225 Difference]: With dead ends: 167 [2022-01-31 07:52:28,189 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 07:52:28,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 07:52:28,190 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 186 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:28,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 82 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 07:52:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 07:52:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 07:52:28,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.06875) internal successors, (171), 160 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 176 transitions. [2022-01-31 07:52:28,194 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 176 transitions. Word has length 87 [2022-01-31 07:52:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:28,194 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 176 transitions. [2022-01-31 07:52:28,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 19 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 176 transitions. [2022-01-31 07:52:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 07:52:28,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:28,195 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:28,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 07:52:28,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:28,416 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:28,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash 494535549, now seen corresponding path program 4 times [2022-01-31 07:52:28,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:28,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504301683] [2022-01-31 07:52:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:28,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:28,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 07:52:28,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504301683] [2022-01-31 07:52:28,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504301683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:28,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847116068] [2022-01-31 07:52:28,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:52:28,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:28,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:28,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:52:28,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 07:52:28,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:52:28,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:52:28,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 07:52:28,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:52:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 07:52:29,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:52:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 07:52:29,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847116068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:52:29,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:52:29,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-01-31 07:52:29,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374237316] [2022-01-31 07:52:29,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:52:29,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 07:52:29,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:52:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 07:52:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 07:52:29,408 INFO L87 Difference]: Start difference. First operand 166 states and 176 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:52:29,788 INFO L93 Difference]: Finished difference Result 192 states and 202 transitions. [2022-01-31 07:52:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 07:52:29,788 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 07:52:29,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:52:29,789 INFO L225 Difference]: With dead ends: 192 [2022-01-31 07:52:29,789 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 07:52:29,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 07:52:29,791 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 108 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:52:29,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 65 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:52:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 07:52:29,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-01-31 07:52:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0591397849462365) internal successors, (197), 186 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:52:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 202 transitions. [2022-01-31 07:52:29,795 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 202 transitions. Word has length 161 [2022-01-31 07:52:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:52:29,795 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 202 transitions. [2022-01-31 07:52:29,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 07:52:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 202 transitions. [2022-01-31 07:52:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 07:52:29,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:52:29,796 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:52:29,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 07:52:30,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:30,007 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:52:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:52:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1922094077, now seen corresponding path program 5 times [2022-01-31 07:52:30,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:52:30,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836711461] [2022-01-31 07:52:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:52:30,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:52:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:30,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:52:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:52:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-01-31 07:52:30,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:52:30,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836711461] [2022-01-31 07:52:30,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836711461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:52:30,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925983777] [2022-01-31 07:52:30,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:52:30,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:52:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:52:30,414 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 07:52:30,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process