/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:45:11,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:45:11,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:45:11,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:45:11,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:45:11,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:45:11,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:45:11,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:45:11,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:45:11,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:45:11,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:45:11,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:45:11,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:45:11,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:45:11,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:45:11,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:45:11,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:45:11,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:45:11,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:45:11,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:45:11,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:45:11,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:45:11,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:45:11,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:45:11,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 13:45:11,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:45:11,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:45:11,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:45:11,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:45:11,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:45:11,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:45:11,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:45:11,452 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:45:11,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:45:11,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:45:11,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:45:11,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:45:11,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:45:11,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:45:11,453 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:45:11,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:45:11,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:45:11,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:45:11,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:45:11,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:45:11,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:45:11,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:45:11,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:45:11,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:45:11,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:45:11,464 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:45:11,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:45:11,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:45:11,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:45:11,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:45:11,726 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:45:11,728 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:45:11,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2022-01-31 13:45:11,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3378cf495/1f913c0285d74c47bd323f37faaba15d/FLAGd501f5d71 [2022-01-31 13:45:12,160 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:45:12,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2022-01-31 13:45:12,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3378cf495/1f913c0285d74c47bd323f37faaba15d/FLAGd501f5d71 [2022-01-31 13:45:12,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3378cf495/1f913c0285d74c47bd323f37faaba15d [2022-01-31 13:45:12,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:45:12,562 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:45:12,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:45:12,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:45:12,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:45:12,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f44eb13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12, skipping insertion in model container [2022-01-31 13:45:12,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:45:12,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:45:12,717 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c[525,538] [2022-01-31 13:45:12,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:45:12,761 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:45:12,772 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c[525,538] [2022-01-31 13:45:12,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:45:12,802 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:45:12,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12 WrapperNode [2022-01-31 13:45:12,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:45:12,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:45:12,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:45:12,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:45:12,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:45:12,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:45:12,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:45:12,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:45:12,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (1/1) ... [2022-01-31 13:45:12,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:45:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:12,868 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 13:45:12,910 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 13:45:12,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:45:12,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:45:12,914 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:45:12,914 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 13:45:12,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:45:12,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:45:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:45:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:45:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:45:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:45:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 13:45:12,915 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 13:45:12,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:45:12,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:45:12,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:45:12,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:45:12,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:45:12,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:45:12,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:45:12,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:45:12,954 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:45:12,955 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:45:13,144 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:45:13,148 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:45:13,148 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 13:45:13,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:45:13 BoogieIcfgContainer [2022-01-31 13:45:13,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:45:13,150 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:45:13,150 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:45:13,151 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:45:13,153 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:45:13" (1/1) ... [2022-01-31 13:45:13,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:45:13 BasicIcfg [2022-01-31 13:45:13,182 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:45:13,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:45:13,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:45:13,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:45:13,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:45:12" (1/4) ... [2022-01-31 13:45:13,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a77607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:45:13, skipping insertion in model container [2022-01-31 13:45:13,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:45:12" (2/4) ... [2022-01-31 13:45:13,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a77607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:45:13, skipping insertion in model container [2022-01-31 13:45:13,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:45:13" (3/4) ... [2022-01-31 13:45:13,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a77607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:45:13, skipping insertion in model container [2022-01-31 13:45:13,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:45:13" (4/4) ... [2022-01-31 13:45:13,186 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.cJordan [2022-01-31 13:45:13,189 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:45:13,189 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:45:13,244 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:45:13,254 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 13:45:13,254 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:45:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 13:45:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 13:45:13,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:13,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:45:13,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:13,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2022-01-31 13:45:13,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:13,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663225895] [2022-01-31 13:45:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:13,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:13,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:45:13,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:13,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:45:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:13,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:45:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:45:13,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:13,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663225895] [2022-01-31 13:45:13,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663225895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:45:13,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:45:13,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:45:13,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184242977] [2022-01-31 13:45:13,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:45:13,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:45:13,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:45:13,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:45:13,443 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 13:45:15,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:15,701 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-01-31 13:45:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:45:15,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-31 13:45:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:15,709 INFO L225 Difference]: With dead ends: 38 [2022-01-31 13:45:15,709 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 13:45:15,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:45:15,712 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:15,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 13:45:15,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 13:45:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 13:45:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 13:45:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-01-31 13:45:15,736 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2022-01-31 13:45:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:15,736 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-01-31 13:45:15,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 13:45:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-01-31 13:45:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 13:45:15,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:15,737 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:45:15,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:45:15,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:15,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2022-01-31 13:45:15,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774760242] [2022-01-31 13:45:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:15,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:15,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:45:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:15,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:45:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:45:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:45:15,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:15,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774760242] [2022-01-31 13:45:15,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774760242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:45:15,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:45:15,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 13:45:15,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334991357] [2022-01-31 13:45:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:45:15,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 13:45:15,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 13:45:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 13:45:15,942 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 13:45:20,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:45:23,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:45:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:24,023 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-01-31 13:45:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 13:45:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-31 13:45:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:24,025 INFO L225 Difference]: With dead ends: 50 [2022-01-31 13:45:24,025 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 13:45:24,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:45:24,026 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 54 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:24,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 51 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 192 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2022-01-31 13:45:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 13:45:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 13:45:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 13:45:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-01-31 13:45:24,034 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 24 [2022-01-31 13:45:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:24,034 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-01-31 13:45:24,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 13:45:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-01-31 13:45:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 13:45:24,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:24,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:45:24,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 13:45:24,037 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash -472493455, now seen corresponding path program 1 times [2022-01-31 13:45:24,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:24,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980896125] [2022-01-31 13:45:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:24,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:24,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:45:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:24,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:45:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:24,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:45:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:45:24,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980896125] [2022-01-31 13:45:24,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980896125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 13:45:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552425478] [2022-01-31 13:45:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:24,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:24,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:24,301 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 13:45:24,323 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 13:45:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:24,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 13:45:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:45:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:45:24,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:45:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:45:24,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552425478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:45:24,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 13:45:24,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-31 13:45:24,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774799544] [2022-01-31 13:45:24,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 13:45:24,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 13:45:24,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 13:45:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-31 13:45:24,737 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 13:45:30,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:36,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:38,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:41,140 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-31 13:45:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:41,206 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2022-01-31 13:45:41,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 13:45:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-01-31 13:45:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:41,208 INFO L225 Difference]: With dead ends: 73 [2022-01-31 13:45:41,208 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 13:45:41,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-01-31 13:45:41,209 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 71 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 206 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:41,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 63 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 300 Invalid, 3 Unknown, 0 Unchecked, 16.3s Time] [2022-01-31 13:45:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 13:45:41,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-31 13:45:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 32 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 13:45:41,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 100 transitions. [2022-01-31 13:45:41,224 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 100 transitions. Word has length 26 [2022-01-31 13:45:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:41,224 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 100 transitions. [2022-01-31 13:45:41,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 13:45:41,225 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 100 transitions. [2022-01-31 13:45:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 13:45:41,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:41,226 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:45:41,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 13:45:41,426 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 13:45:41,427 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:41,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1385093780, now seen corresponding path program 1 times [2022-01-31 13:45:41,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:41,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680095358] [2022-01-31 13:45:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:41,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:41,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:45:41,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76670235] [2022-01-31 13:45:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:41,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:41,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:41,482 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 13:45:41,536 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 13:45:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:45:41,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:45:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 13:45:41,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:45:41,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:41,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680095358] [2022-01-31 13:45:41,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:45:41,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76670235] [2022-01-31 13:45:41,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76670235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:45:41,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:45:41,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:45:41,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562600462] [2022-01-31 13:45:41,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:45:41,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:45:41,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:45:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:45:41,687 INFO L87 Difference]: Start difference. First operand 70 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 13:45:43,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:45:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:44,356 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2022-01-31 13:45:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:45:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-01-31 13:45:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:44,358 INFO L225 Difference]: With dead ends: 79 [2022-01-31 13:45:44,358 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 13:45:44,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:45:44,360 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:44,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 169 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 13:45:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 13:45:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-01-31 13:45:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 26 states have call successors, (26), 5 states have call predecessors, (26), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 13:45:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2022-01-31 13:45:44,371 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 34 [2022-01-31 13:45:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:44,371 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2022-01-31 13:45:44,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 13:45:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2022-01-31 13:45:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 13:45:44,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:44,372 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:45:44,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 13:45:44,578 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 13:45:44,578 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash 419889614, now seen corresponding path program 1 times [2022-01-31 13:45:44,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:44,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964559418] [2022-01-31 13:45:44,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:44,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:44,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:45:44,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129866327] [2022-01-31 13:45:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:44,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:44,603 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 13:45:44,604 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 13:45:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:45:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:45:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:45:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 13:45:44,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:45:44,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:45:44,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964559418] [2022-01-31 13:45:44,769 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:45:44,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129866327] [2022-01-31 13:45:44,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129866327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:45:44,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:45:44,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:45:44,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132568471] [2022-01-31 13:45:44,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:45:44,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:45:44,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:45:44,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:45:44,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:45:44,771 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 13:45:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:45:45,467 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2022-01-31 13:45:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:45:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-01-31 13:45:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:45:45,468 INFO L225 Difference]: With dead ends: 66 [2022-01-31 13:45:45,468 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 13:45:45,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:45:45,469 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 13:45:45,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 166 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 13:45:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 13:45:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-01-31 13:45:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 13:45:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-01-31 13:45:45,479 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 36 [2022-01-31 13:45:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:45:45,480 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-01-31 13:45:45,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 13:45:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-01-31 13:45:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 13:45:45,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:45:45,481 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:45:45,498 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 13:45:45,681 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 13:45:45,682 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:45:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:45:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1513839050, now seen corresponding path program 1 times [2022-01-31 13:45:45,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:45:45,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721480155] [2022-01-31 13:45:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:45,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:45:45,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:45:45,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111755218] [2022-01-31 13:45:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:45:45,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:45:45,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:45:45,693 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 13:45:45,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process