/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/bresenham-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 17:20:36,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 17:20:36,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 17:20:36,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 17:20:36,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 17:20:36,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 17:20:36,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 17:20:36,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 17:20:36,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 17:20:36,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 17:20:36,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 17:20:36,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 17:20:36,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 17:20:36,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 17:20:36,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 17:20:36,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 17:20:36,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 17:20:36,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 17:20:36,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 17:20:36,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 17:20:36,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 17:20:36,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 17:20:36,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 17:20:36,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 17:20:36,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 17:20:36,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 17:20:36,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 17:20:36,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 17:20:36,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 17:20:36,529 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 17:20:36,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 17:20:36,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 17:20:36,533 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 17:20:36,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 17:20:36,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 17:20:36,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 17:20:36,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 17:20:36,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 17:20:36,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 17:20:36,534 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 17:20:36,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 17:20:36,534 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 17:20:36,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 17:20:36,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 17:20:36,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 17:20:36,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 17:20:36,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 17:20:36,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:20:36,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 17:20:36,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 17:20:36,536 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 17:20:36,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 17:20:36,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 17:20:36,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 17:20:36,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 17:20:36,765 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 17:20:36,766 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 17:20:36,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2022-02-23 17:20:36,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07e4fb1b7/6a62397e29604ff69807abd1af9e5f50/FLAGe040f6905 [2022-02-23 17:20:37,168 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 17:20:37,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound50.c [2022-02-23 17:20:37,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07e4fb1b7/6a62397e29604ff69807abd1af9e5f50/FLAGe040f6905 [2022-02-23 17:20:37,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07e4fb1b7/6a62397e29604ff69807abd1af9e5f50 [2022-02-23 17:20:37,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 17:20:37,194 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 17:20:37,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 17:20:37,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 17:20:37,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 17:20:37,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38281681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37, skipping insertion in model container [2022-02-23 17:20:37,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 17:20:37,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 17:20:37,349 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/bresenham-ll_valuebound50.c[597,610] [2022-02-23 17:20:37,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:20:37,368 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 17:20:37,376 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/bresenham-ll_valuebound50.c[597,610] [2022-02-23 17:20:37,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 17:20:37,390 INFO L208 MainTranslator]: Completed translation [2022-02-23 17:20:37,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37 WrapperNode [2022-02-23 17:20:37,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 17:20:37,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 17:20:37,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 17:20:37,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 17:20:37,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 17:20:37,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 17:20:37,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 17:20:37,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 17:20:37,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 17:20:37,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:37,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 17:20:37,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 17:20:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 17:20:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 17:20:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 17:20:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 17:20:37,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 17:20:37,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 17:20:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 17:20:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 17:20:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 17:20:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 17:20:37,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 17:20:37,512 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 17:20:37,513 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 17:20:37,647 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 17:20:37,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 17:20:37,652 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 17:20:37,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:20:37 BoogieIcfgContainer [2022-02-23 17:20:37,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 17:20:37,655 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 17:20:37,655 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 17:20:37,656 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 17:20:37,658 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:20:37" (1/1) ... [2022-02-23 17:20:37,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:20:37 BasicIcfg [2022-02-23 17:20:37,673 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 17:20:37,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 17:20:37,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 17:20:37,676 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 17:20:37,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 05:20:37" (1/4) ... [2022-02-23 17:20:37,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd372ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:20:37, skipping insertion in model container [2022-02-23 17:20:37,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 05:20:37" (2/4) ... [2022-02-23 17:20:37,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd372ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 05:20:37, skipping insertion in model container [2022-02-23 17:20:37,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 05:20:37" (3/4) ... [2022-02-23 17:20:37,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd372ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:20:37, skipping insertion in model container [2022-02-23 17:20:37,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 05:20:37" (4/4) ... [2022-02-23 17:20:37,678 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound50.cJordan [2022-02-23 17:20:37,681 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 17:20:37,681 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 17:20:37,707 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 17:20:37,711 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 [2022-02-23 17:20:37,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 17:20:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 17:20:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 17:20:37,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:37,737 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] [2022-02-23 17:20:37,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:37,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2022-02-23 17:20:37,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:37,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846886242] [2022-02-23 17:20:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:37,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 17:20:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:37,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 17:20:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:37,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 17:20:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:20:37,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:37,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846886242] [2022-02-23 17:20:37,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846886242] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:20:37,948 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:20:37,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 17:20:37,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619819693] [2022-02-23 17:20:37,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:20:37,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 17:20:37,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:37,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 17:20:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 17:20:37,977 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2022-02-23 17:20:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:38,018 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-02-23 17:20:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 17:20:38,024 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 [2022-02-23 17:20:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:38,030 INFO L225 Difference]: With dead ends: 32 [2022-02-23 17:20:38,030 INFO L226 Difference]: Without dead ends: 27 [2022-02-23 17:20:38,031 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 [2022-02-23 17:20:38,035 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:38,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:20:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-23 17:20:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-23 17:20:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 17:20:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-23 17:20:38,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-02-23 17:20:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:38,068 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-23 17:20:38,068 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) [2022-02-23 17:20:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-23 17:20:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 17:20:38,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:38,069 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] [2022-02-23 17:20:38,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 17:20:38,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:38,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2022-02-23 17:20:38,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:38,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779107372] [2022-02-23 17:20:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:38,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:38,084 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:38,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438889036] [2022-02-23 17:20:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:38,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:38,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:38,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:20:38,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 17:20:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 17:20:38,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:20:38,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 17:20:38,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:38,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779107372] [2022-02-23 17:20:38,299 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:38,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438889036] [2022-02-23 17:20:38,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438889036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 17:20:38,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 17:20:38,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 17:20:38,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597026382] [2022-02-23 17:20:38,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 17:20:38,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 17:20:38,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 17:20:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 17:20:38,301 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:20:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:38,381 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-02-23 17:20:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 17:20:38,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 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 23 [2022-02-23 17:20:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:38,382 INFO L225 Difference]: With dead ends: 37 [2022-02-23 17:20:38,383 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 17:20:38,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:20:38,384 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:38,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:20:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 17:20:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-23 17:20:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 17:20:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-02-23 17:20:38,388 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-02-23 17:20:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:38,389 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-02-23 17:20:38,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 17:20:38,389 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-02-23 17:20:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 17:20:38,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:38,390 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-23 17:20:38,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 17:20:38,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:38,600 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:38,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:38,600 INFO L85 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2022-02-23 17:20:38,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:38,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500069722] [2022-02-23 17:20:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:38,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:38,613 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:38,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123983880] [2022-02-23 17:20:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:38,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:38,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:38,614 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:20:38,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 17:20:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:38,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 17:20:38,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 17:20:38,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-23 17:20:38,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:38,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500069722] [2022-02-23 17:20:38,995 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:38,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123983880] [2022-02-23 17:20:38,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123983880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:20:38,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:20:38,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-02-23 17:20:38,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65572343] [2022-02-23 17:20:38,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:20:38,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 17:20:38,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:38,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 17:20:38,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 17:20:38,997 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 17:20:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:39,184 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-02-23 17:20:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 17:20:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-02-23 17:20:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:39,186 INFO L225 Difference]: With dead ends: 46 [2022-02-23 17:20:39,186 INFO L226 Difference]: Without dead ends: 42 [2022-02-23 17:20:39,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-23 17:20:39,187 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:39,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 138 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:20:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-23 17:20:39,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-02-23 17:20:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 17:20:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-02-23 17:20:39,191 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-02-23 17:20:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:39,191 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-02-23 17:20:39,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 17:20:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-02-23 17:20:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 17:20:39,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:39,195 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-02-23 17:20:39,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 17:20:39,407 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,SelfDestructingSolverStorable2 [2022-02-23 17:20:39,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:39,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:39,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2022-02-23 17:20:39,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:39,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282305353] [2022-02-23 17:20:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:39,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:39,416 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:39,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078779145] [2022-02-23 17:20:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:39,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:20:39,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 17:20:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:39,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 17:20:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-23 17:20:39,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-23 17:20:40,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:40,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282305353] [2022-02-23 17:20:40,149 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:40,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078779145] [2022-02-23 17:20:40,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078779145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:20:40,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:20:40,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-02-23 17:20:40,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720306569] [2022-02-23 17:20:40,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:20:40,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-23 17:20:40,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:40,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-23 17:20:40,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-23 17:20:40,150 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-23 17:20:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:20:40,637 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-02-23 17:20:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-23 17:20:40,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-02-23 17:20:40,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:20:40,639 INFO L225 Difference]: With dead ends: 59 [2022-02-23 17:20:40,639 INFO L226 Difference]: Without dead ends: 53 [2022-02-23 17:20:40,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 17:20:40,640 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:20:40,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 248 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 188 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-02-23 17:20:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-23 17:20:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2022-02-23 17:20:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 17:20:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-02-23 17:20:40,644 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 39 [2022-02-23 17:20:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:20:40,645 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-02-23 17:20:40,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-23 17:20:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-02-23 17:20:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-23 17:20:40,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:20:40,646 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:20:40,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-23 17:20:40,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:40,864 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:20:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:20:40,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1381917339, now seen corresponding path program 1 times [2022-02-23 17:20:40,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:20:40,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368399659] [2022-02-23 17:20:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:40,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:20:40,873 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:20:40,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976198101] [2022-02-23 17:20:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:20:40,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:20:40,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:20:40,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:20:40,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 17:20:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:20:40,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 17:20:40,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:20:41,009 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:20:41,014 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:20:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-23 17:20:44,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:20:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-02-23 17:20:45,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:20:45,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368399659] [2022-02-23 17:20:45,171 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:20:45,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976198101] [2022-02-23 17:20:45,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976198101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:20:45,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:20:45,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-02-23 17:20:45,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545806157] [2022-02-23 17:20:45,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:20:45,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 17:20:45,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:20:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 17:20:45,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2022-02-23 17:20:45,173 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-23 17:20:47,253 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 [] [2022-02-23 17:20:51,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:53,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:55,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:57,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:20:59,366 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 [] [2022-02-23 17:21:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:21:01,611 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-02-23 17:21:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 17:21:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2022-02-23 17:21:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:21:01,612 INFO L225 Difference]: With dead ends: 59 [2022-02-23 17:21:01,612 INFO L226 Difference]: Without dead ends: 55 [2022-02-23 17:21:01,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2022-02-23 17:21:01,614 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 15 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-02-23 17:21:01,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 186 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 140 Invalid, 6 Unknown, 0 Unchecked, 12.2s Time] [2022-02-23 17:21:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-23 17:21:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-02-23 17:21:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-23 17:21:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-02-23 17:21:01,619 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2022-02-23 17:21:01,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:21:01,619 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-02-23 17:21:01,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-02-23 17:21:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-02-23 17:21:01,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 17:21:01,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:21:01,620 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:21:01,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 17:21:01,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:21:01,821 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:21:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:21:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash -545218702, now seen corresponding path program 1 times [2022-02-23 17:21:01,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:21:01,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277639830] [2022-02-23 17:21:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:21:01,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:21:01,829 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:21:01,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043306363] [2022-02-23 17:21:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:21:01,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:21:01,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:21:01,831 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) [2022-02-23 17:21:01,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 17:21:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 17:21:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 17:21:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:21:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:21:02,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:21:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:21:02,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:21:02,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277639830] [2022-02-23 17:21:02,250 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:21:02,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043306363] [2022-02-23 17:21:02,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043306363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:21:02,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:21:02,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 17:21:02,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545858262] [2022-02-23 17:21:02,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:21:02,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 17:21:02,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:21:02,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 17:21:02,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-02-23 17:21:02,252 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-23 17:21:02,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:21:02,403 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-02-23 17:21:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 17:21:02,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 57 [2022-02-23 17:21:02,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:21:02,404 INFO L225 Difference]: With dead ends: 72 [2022-02-23 17:21:02,404 INFO L226 Difference]: Without dead ends: 72 [2022-02-23 17:21:02,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-23 17:21:02,405 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 17:21:02,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 241 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 17:21:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-23 17:21:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2022-02-23 17:21:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 17:21:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-02-23 17:21:02,410 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 57 [2022-02-23 17:21:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:21:02,410 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-02-23 17:21:02,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-23 17:21:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-02-23 17:21:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 17:21:02,411 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:21:02,411 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:21:02,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 17:21:02,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:21:02,627 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:21:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:21:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash 494880272, now seen corresponding path program 2 times [2022-02-23 17:21:02,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:21:02,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672923541] [2022-02-23 17:21:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:21:02,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:21:02,635 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:21:02,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94631621] [2022-02-23 17:21:02,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 17:21:02,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:21:02,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:21:02,640 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) [2022-02-23 17:21:02,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 17:21:02,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 17:21:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:21:02,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 17:21:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:21:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-02-23 17:21:02,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:21:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 17:21:02,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:21:02,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672923541] [2022-02-23 17:21:02,878 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:21:02,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94631621] [2022-02-23 17:21:02,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94631621] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:21:02,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:21:02,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-02-23 17:21:02,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450484790] [2022-02-23 17:21:02,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:21:02,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 17:21:02,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:21:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 17:21:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-23 17:21:02,879 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-23 17:21:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:21:02,931 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-02-23 17:21:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 17:21:02,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 57 [2022-02-23 17:21:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:21:02,932 INFO L225 Difference]: With dead ends: 77 [2022-02-23 17:21:02,932 INFO L226 Difference]: Without dead ends: 77 [2022-02-23 17:21:02,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-23 17:21:02,933 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 17:21:02,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 134 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 17:21:02,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-23 17:21:02,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-02-23 17:21:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 17:21:02,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2022-02-23 17:21:02,938 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 57 [2022-02-23 17:21:02,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:21:02,939 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2022-02-23 17:21:02,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-02-23 17:21:02,939 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2022-02-23 17:21:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-23 17:21:02,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 17:21:02,940 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 17:21:02,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 17:21:03,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:21:03,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 17:21:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 17:21:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1739644753, now seen corresponding path program 3 times [2022-02-23 17:21:03,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 17:21:03,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490758887] [2022-02-23 17:21:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 17:21:03,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 17:21:03,162 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 17:21:03,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858181674] [2022-02-23 17:21:03,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 17:21:03,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:21:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 17:21:03,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 17:21:03,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 17:21:03,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-23 17:21:03,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 17:21:03,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-23 17:21:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 17:21:04,851 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:21:04,854 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:21:04,856 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:21:31,501 WARN L232 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 17:21:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-23 17:21:45,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 17:21:52,405 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:21:56,205 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 17:22:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-02-23 17:22:12,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 17:22:12,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490758887] [2022-02-23 17:22:12,702 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 17:22:12,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858181674] [2022-02-23 17:22:12,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858181674] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 17:22:12,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 17:22:12,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-02-23 17:22:12,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161455095] [2022-02-23 17:22:12,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 17:22:12,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 17:22:12,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 17:22:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 17:22:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=493, Unknown=9, NotChecked=0, Total=600 [2022-02-23 17:22:12,705 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-23 17:22:14,943 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 [] [2022-02-23 17:22:20,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:22:22,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:22:24,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:22:27,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 17:22:55,446 WARN L232 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 66 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 17:22:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 17:22:55,593 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-02-23 17:22:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-23 17:22:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 57 [2022-02-23 17:22:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 17:22:55,594 INFO L225 Difference]: With dead ends: 78 [2022-02-23 17:22:55,594 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 17:22:55,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 77.5s TimeCoverageRelationStatistics Valid=205, Invalid=972, Unknown=13, NotChecked=0, Total=1190 [2022-02-23 17:22:55,595 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 19 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-02-23 17:22:55,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 151 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 176 Invalid, 5 Unknown, 41 Unchecked, 10.7s Time] [2022-02-23 17:22:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 17:22:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 17:22:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 17:22:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 17:22:55,596 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2022-02-23 17:22:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 17:22:55,596 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 17:22:55,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-02-23 17:22:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 17:22:55,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 17:22:55,598 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 17:22:55,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 17:22:55,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 17:22:55,805 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-02-23 17:22:55,806 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 17:22:55,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 05:22:55 BasicIcfg [2022-02-23 17:22:55,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 17:22:55,808 INFO L158 Benchmark]: Toolchain (without parser) took 138614.81ms. Allocated memory was 198.2MB in the beginning and 245.4MB in the end (delta: 47.2MB). Free memory was 143.4MB in the beginning and 194.9MB in the end (delta: -51.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 17:22:55,808 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory is still 159.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 17:22:55,808 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.32ms. Allocated memory was 198.2MB in the beginning and 245.4MB in the end (delta: 47.2MB). Free memory was 143.2MB in the beginning and 214.9MB in the end (delta: -71.7MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. [2022-02-23 17:22:55,809 INFO L158 Benchmark]: Boogie Preprocessor took 20.98ms. Allocated memory is still 245.4MB. Free memory was 214.9MB in the beginning and 213.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:22:55,809 INFO L158 Benchmark]: RCFGBuilder took 240.00ms. Allocated memory is still 245.4MB. Free memory was 213.4MB in the beginning and 202.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-23 17:22:55,809 INFO L158 Benchmark]: IcfgTransformer took 17.93ms. Allocated memory is still 245.4MB. Free memory was 202.9MB in the beginning and 201.7MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 17:22:55,809 INFO L158 Benchmark]: TraceAbstraction took 138133.48ms. Allocated memory is still 245.4MB. Free memory was 201.3MB in the beginning and 194.9MB in the end (delta: 6.4MB). Peak memory consumption was 6.1MB. Max. memory is 8.0GB. [2022-02-23 17:22:55,810 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory is still 159.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.32ms. Allocated memory was 198.2MB in the beginning and 245.4MB in the end (delta: 47.2MB). Free memory was 143.2MB in the beginning and 214.9MB in the end (delta: -71.7MB). Peak memory consumption was 13.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.98ms. Allocated memory is still 245.4MB. Free memory was 214.9MB in the beginning and 213.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 240.00ms. Allocated memory is still 245.4MB. Free memory was 213.4MB in the beginning and 202.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.93ms. Allocated memory is still 245.4MB. Free memory was 202.9MB in the beginning and 201.7MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 138133.48ms. Allocated memory is still 245.4MB. Free memory was 201.3MB in the beginning and 194.9MB in the end (delta: 6.4MB). Peak memory consumption was 6.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 138.1s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 60.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 150 SdHoareTripleChecker+Valid, 23.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 143 mSDsluCounter, 1233 SdHoareTripleChecker+Invalid, 23.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 110 IncrementalHoareTripleChecker+Unchecked, 1035 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 937 IncrementalHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 198 mSDtfsCounter, 937 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 646 GetRequests, 515 SyntacticMatches, 8 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 85.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, InterpolantAutomatonStates: 99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 31 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 75.3s InterpolantComputationTime, 336 NumberOfCodeBlocks, 318 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 612 ConstructedInterpolants, 6 QuantifiedInterpolants, 3260 SizeOfPredicates, 49 NumberOfNonLiveVariables, 873 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 389/480 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 17:22:55,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...