/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/ps2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 08:09:23,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 08:09:23,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 08:09:23,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 08:09:23,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 08:09:23,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 08:09:23,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 08:09:23,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 08:09:23,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 08:09:23,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 08:09:23,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 08:09:23,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 08:09:23,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 08:09:23,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 08:09:23,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 08:09:23,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 08:09:23,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 08:09:23,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 08:09:23,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 08:09:23,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 08:09:23,522 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 08:09:23,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 08:09:23,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 08:09:23,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 08:09:23,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 08:09:23,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 08:09:23,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 08:09:23,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 08:09:23,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 08:09:23,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 08:09:23,548 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 08:09:23,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 08:09:23,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 08:09:23,550 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 08:09:23,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 08:09:23,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 08:09:23,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 08:09:23,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 08:09:23,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 08:09:23,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 08:09:23,552 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 08:09:23,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 08:09:23,552 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 08:09:23,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 08:09:23,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 08:09:23,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 08:09:23,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 08:09:23,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 08:09:23,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:09:23,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 08:09:23,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 08:09:23,554 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 08:09:23,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 08:09:23,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 08:09:23,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 08:09:23,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 08:09:23,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 08:09:23,802 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 08:09:23,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound10.c [2022-04-06 08:09:23,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928357e4b/aba2c1f2ad07471e9f36ebef5eda6598/FLAG39002bae9 [2022-04-06 08:09:24,213 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 08:09:24,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound10.c [2022-04-06 08:09:24,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928357e4b/aba2c1f2ad07471e9f36ebef5eda6598/FLAG39002bae9 [2022-04-06 08:09:24,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928357e4b/aba2c1f2ad07471e9f36ebef5eda6598 [2022-04-06 08:09:24,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 08:09:24,636 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 08:09:24,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 08:09:24,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 08:09:24,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 08:09:24,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1696c717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24, skipping insertion in model container [2022-04-06 08:09:24,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 08:09:24,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 08:09:24,852 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/ps2-ll_unwindbound10.c[454,467] [2022-04-06 08:09:24,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:09:24,873 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 08:09:24,883 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/ps2-ll_unwindbound10.c[454,467] [2022-04-06 08:09:24,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:09:24,907 INFO L208 MainTranslator]: Completed translation [2022-04-06 08:09:24,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24 WrapperNode [2022-04-06 08:09:24,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 08:09:24,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 08:09:24,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 08:09:24,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 08:09:24,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 08:09:24,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 08:09:24,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 08:09:24,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 08:09:24,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (1/1) ... [2022-04-06 08:09:24,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:09:24,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:24,976 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) [2022-04-06 08:09:24,983 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 [2022-04-06 08:09:25,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 08:09:25,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 08:09:25,009 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 08:09:25,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 08:09:25,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 08:09:25,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 08:09:25,010 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 08:09:25,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 08:09:25,010 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 08:09:25,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 08:09:25,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 08:09:25,011 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 08:09:25,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 08:09:25,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 08:09:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 08:09:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 08:09:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 08:09:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 08:09:25,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 08:09:25,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 08:09:25,071 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 08:09:25,072 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 08:09:25,210 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 08:09:25,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 08:09:25,215 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 08:09:25,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:25 BoogieIcfgContainer [2022-04-06 08:09:25,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 08:09:25,217 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 08:09:25,217 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 08:09:25,236 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 08:09:25,238 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:25" (1/1) ... [2022-04-06 08:09:25,240 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 08:09:25,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:09:25 BasicIcfg [2022-04-06 08:09:25,264 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 08:09:25,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 08:09:25,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 08:09:25,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 08:09:25,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:09:24" (1/4) ... [2022-04-06 08:09:25,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d6ab32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:09:25, skipping insertion in model container [2022-04-06 08:09:25,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:24" (2/4) ... [2022-04-06 08:09:25,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d6ab32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:09:25, skipping insertion in model container [2022-04-06 08:09:25,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:25" (3/4) ... [2022-04-06 08:09:25,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d6ab32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:09:25, skipping insertion in model container [2022-04-06 08:09:25,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:09:25" (4/4) ... [2022-04-06 08:09:25,271 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound10.cJordan [2022-04-06 08:09:25,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 08:09:25,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 08:09:25,324 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 08:09:25,332 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 08:09:25,333 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 08:09:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 08:09:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 08:09:25,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:25,352 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:25,353 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:25,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2022-04-06 08:09:25,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:25,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313891538] [2022-04-06 08:09:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:25,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:25,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:09:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:25,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:25,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313891538] [2022-04-06 08:09:25,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313891538] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:09:25,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:09:25,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 08:09:25,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549709960] [2022-04-06 08:09:25,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:25,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 08:09:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 08:09:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:09:25,590 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:09:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:25,639 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-04-06 08:09:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 08:09:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 08:09:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:25,650 INFO L225 Difference]: With dead ends: 23 [2022-04-06 08:09:25,650 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 08:09:25,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:09:25,656 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:25,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 08:09:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-04-06 08:09:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 08:09:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 08:09:25,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-06 08:09:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:25,688 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 08:09:25,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:09:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 08:09:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 08:09:25,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:25,690 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:25,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 08:09:25,691 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2022-04-06 08:09:25,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:25,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616173329] [2022-04-06 08:09:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:25,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:25,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:25,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087202523] [2022-04-06 08:09:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:25,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:25,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:25,735 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) [2022-04-06 08:09:25,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 08:09:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 08:09:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:25,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:09:25,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616173329] [2022-04-06 08:09:25,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:25,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087202523] [2022-04-06 08:09:25,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087202523] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:09:25,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:09:25,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 08:09:25,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304568953] [2022-04-06 08:09:25,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:25,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 08:09:25,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:25,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 08:09:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:09:25,884 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:09:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:25,900 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-06 08:09:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 08:09:25,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 08:09:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:25,902 INFO L225 Difference]: With dead ends: 19 [2022-04-06 08:09:25,902 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 08:09:25,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 08:09:25,904 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:25,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:25,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 08:09:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 08:09:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 08:09:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 08:09:25,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-06 08:09:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:25,908 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 08:09:25,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:09:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 08:09:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 08:09:25,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:25,909 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:25,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:26,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:26,111 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:26,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:26,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2022-04-06 08:09:26,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:26,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66882049] [2022-04-06 08:09:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:26,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:26,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:26,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371632575] [2022-04-06 08:09:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:26,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:26,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:26,126 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) [2022-04-06 08:09:26,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 08:09:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:26,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 08:09:26,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:26,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:09:26,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:26,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66882049] [2022-04-06 08:09:26,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:26,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371632575] [2022-04-06 08:09:26,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371632575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:09:26,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:09:26,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 08:09:26,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365499893] [2022-04-06 08:09:26,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:26,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 08:09:26,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:26,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 08:09:26,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:09:26,260 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:09:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:26,302 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-06 08:09:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 08:09:26,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 08:09:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:26,303 INFO L225 Difference]: With dead ends: 26 [2022-04-06 08:09:26,303 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 08:09:26,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:09:26,305 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:26,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 08:09:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 08:09:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 08:09:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 08:09:26,310 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-06 08:09:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:26,310 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 08:09:26,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 08:09:26,310 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 08:09:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 08:09:26,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:26,311 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:26,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 08:09:26,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 08:09:26,532 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:26,532 INFO L85 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2022-04-06 08:09:26,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:26,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500351186] [2022-04-06 08:09:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:26,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:26,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:26,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324544682] [2022-04-06 08:09:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:26,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:26,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:26,544 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) [2022-04-06 08:09:26,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 08:09:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:26,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 08:09:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:26,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:09:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:26,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:26,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500351186] [2022-04-06 08:09:26,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:26,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324544682] [2022-04-06 08:09:26,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324544682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 08:09:26,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 08:09:26,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 08:09:26,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830151686] [2022-04-06 08:09:26,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 08:09:26,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 08:09:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 08:09:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 08:09:26,775 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 08:09:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:26,831 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-04-06 08:09:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 08:09:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-04-06 08:09:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:26,833 INFO L225 Difference]: With dead ends: 49 [2022-04-06 08:09:26,833 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 08:09:26,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 08:09:26,834 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:26,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 75 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 08:09:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-04-06 08:09:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:09:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-04-06 08:09:26,841 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 20 [2022-04-06 08:09:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:26,841 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-04-06 08:09:26,841 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 08:09:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-04-06 08:09:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 08:09:26,842 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:26,842 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:26,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:27,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:27,056 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:27,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2022-04-06 08:09:27,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:27,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817784330] [2022-04-06 08:09:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:27,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:27,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:27,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448894492] [2022-04-06 08:09:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:27,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:27,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:27,068 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) [2022-04-06 08:09:27,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 08:09:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:27,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 08:09:27,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:27,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:09:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 08:09:27,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:27,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817784330] [2022-04-06 08:09:27,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:27,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448894492] [2022-04-06 08:09:27,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448894492] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 08:09:27,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:09:27,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 08:09:27,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616040055] [2022-04-06 08:09:27,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:27,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 08:09:27,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:27,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 08:09:27,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 08:09:27,349 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 08:09:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:27,374 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-04-06 08:09:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 08:09:27,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 08:09:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:27,375 INFO L225 Difference]: With dead ends: 43 [2022-04-06 08:09:27,376 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 08:09:27,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 08:09:27,377 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:27,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 08:09:27,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 08:09:27,378 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) [2022-04-06 08:09:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 08:09:27,378 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-04-06 08:09:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:27,378 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 08:09:27,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 08:09:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 08:09:27,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 08:09:27,381 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 08:09:27,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:27,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:27,606 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-04-06 08:09:27,607 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 08:09:27,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:09:27 BasicIcfg [2022-04-06 08:09:27,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 08:09:27,610 INFO L158 Benchmark]: Toolchain (without parser) took 2973.77ms. Allocated memory was 172.0MB in the beginning and 206.6MB in the end (delta: 34.6MB). Free memory was 122.1MB in the beginning and 150.5MB in the end (delta: -28.4MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-04-06 08:09:27,610 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 172.0MB. Free memory is still 137.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 08:09:27,610 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.11ms. Allocated memory is still 172.0MB. Free memory was 122.0MB in the beginning and 148.2MB in the end (delta: -26.2MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. [2022-04-06 08:09:27,610 INFO L158 Benchmark]: Boogie Preprocessor took 33.83ms. Allocated memory is still 172.0MB. Free memory was 147.7MB in the beginning and 146.6MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 08:09:27,611 INFO L158 Benchmark]: RCFGBuilder took 273.58ms. Allocated memory is still 172.0MB. Free memory was 146.6MB in the beginning and 136.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 08:09:27,611 INFO L158 Benchmark]: IcfgTransformer took 47.37ms. Allocated memory is still 172.0MB. Free memory was 136.6MB in the beginning and 135.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 08:09:27,611 INFO L158 Benchmark]: TraceAbstraction took 2343.64ms. Allocated memory was 172.0MB in the beginning and 206.6MB in the end (delta: 34.6MB). Free memory was 135.0MB in the beginning and 150.5MB in the end (delta: -15.5MB). Peak memory consumption was 20.7MB. Max. memory is 8.0GB. [2022-04-06 08:09:27,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 172.0MB. Free memory is still 137.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 264.11ms. Allocated memory is still 172.0MB. Free memory was 122.0MB in the beginning and 148.2MB in the end (delta: -26.2MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.83ms. Allocated memory is still 172.0MB. Free memory was 147.7MB in the beginning and 146.6MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 273.58ms. Allocated memory is still 172.0MB. Free memory was 146.6MB in the beginning and 136.6MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 47.37ms. Allocated memory is still 172.0MB. Free memory was 136.6MB in the beginning and 135.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2343.64ms. Allocated memory was 172.0MB in the beginning and 206.6MB in the end (delta: 34.6MB). Free memory was 135.0MB in the beginning and 150.5MB in the end (delta: -15.5MB). Peak memory consumption was 20.7MB. 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: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 243 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 154 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 78 IncrementalHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 89 mSDtfsCounter, 78 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, InterpolantAutomatonStates: 27, 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, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 317 SizeOfPredicates, 5 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 11/18 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! [2022-04-06 08:09:27,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...