/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/loop-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 14:57:32,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 14:57:32,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 14:57:32,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 14:57:32,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 14:57:32,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 14:57:32,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 14:57:32,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 14:57:32,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 14:57:32,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 14:57:32,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 14:57:32,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 14:57:32,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 14:57:32,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 14:57:32,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 14:57:32,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 14:57:32,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 14:57:32,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 14:57:32,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 14:57:32,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 14:57:32,805 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 14:57:32,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 14:57:32,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 14:57:32,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 14:57:32,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 14:57:32,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 14:57:32,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 14:57:32,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 14:57:32,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 14:57:32,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 14:57:32,832 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 14:57:32,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 14:57:32,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 14:57:32,833 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 14:57:32,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 14:57:32,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 14:57:32,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 14:57:32,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 14:57:32,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 14:57:32,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 14:57:32,834 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 14:57:32,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 14:57:32,834 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 14:57:32,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 14:57:32,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 14:57:32,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 14:57:32,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 14:57:32,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 14:57:32,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:57:32,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 14:57:32,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 14:57:32,835 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 14:57:32,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 14:57:33,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 14:57:33,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 14:57:33,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 14:57:33,068 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 14:57:33,069 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 14:57:33,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2022-03-17 14:57:33,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8b6fbaf6/563a2ed9c11a465ebeb5ad9580ee6821/FLAG4ef857c07 [2022-03-17 14:57:33,441 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 14:57:33,442 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2022-03-17 14:57:33,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8b6fbaf6/563a2ed9c11a465ebeb5ad9580ee6821/FLAG4ef857c07 [2022-03-17 14:57:33,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8b6fbaf6/563a2ed9c11a465ebeb5ad9580ee6821 [2022-03-17 14:57:33,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 14:57:33,473 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 14:57:33,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 14:57:33,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 14:57:33,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 14:57:33,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700016cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33, skipping insertion in model container [2022-03-17 14:57:33,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 14:57:33,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 14:57:33,635 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i[893,906] [2022-03-17 14:57:33,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:57:33,649 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 14:57:33,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i[893,906] [2022-03-17 14:57:33,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:57:33,668 INFO L208 MainTranslator]: Completed translation [2022-03-17 14:57:33,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33 WrapperNode [2022-03-17 14:57:33,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 14:57:33,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 14:57:33,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 14:57:33,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 14:57:33,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 14:57:33,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 14:57:33,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 14:57:33,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 14:57:33,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:57:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:57:33,712 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) [2022-03-17 14:57:33,729 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 [2022-03-17 14:57:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 14:57:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 14:57:33,742 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 14:57:33,742 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 14:57:33,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 14:57:33,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 14:57:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 14:57:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 14:57:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 14:57:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 14:57:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 14:57:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 14:57:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 14:57:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 14:57:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 14:57:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 14:57:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 14:57:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 14:57:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 14:57:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 14:57:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 14:57:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 14:57:33,812 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 14:57:33,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 14:57:33,961 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 14:57:33,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 14:57:33,968 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 14:57:33,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:57:33 BoogieIcfgContainer [2022-03-17 14:57:33,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 14:57:33,972 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 14:57:33,972 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 14:57:33,973 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 14:57:33,975 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:57:33" (1/1) ... [2022-03-17 14:57:33,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:57:33 BasicIcfg [2022-03-17 14:57:33,989 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 14:57:33,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 14:57:33,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 14:57:33,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 14:57:33,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:57:33" (1/4) ... [2022-03-17 14:57:33,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc9fb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:57:33, skipping insertion in model container [2022-03-17 14:57:33,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:57:33" (2/4) ... [2022-03-17 14:57:33,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc9fb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:57:33, skipping insertion in model container [2022-03-17 14:57:33,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:57:33" (3/4) ... [2022-03-17 14:57:33,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc9fb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:57:33, skipping insertion in model container [2022-03-17 14:57:33,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:57:33" (4/4) ... [2022-03-17 14:57:33,995 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.iJordan [2022-03-17 14:57:33,998 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 14:57:33,998 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 14:57:34,035 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 14:57:34,041 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 [2022-03-17 14:57:34,041 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 14:57:34,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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) [2022-03-17 14:57:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-17 14:57:34,068 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:57:34,069 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:57:34,069 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:57:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:57:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1231819666, now seen corresponding path program 1 times [2022-03-17 14:57:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:57:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025579207] [2022-03-17 14:57:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:57:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:57:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:57:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:57:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:57:34,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025579207] [2022-03-17 14:57:34,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025579207] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:57:34,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:57:34,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-17 14:57:34,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897211518] [2022-03-17 14:57:34,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:57:34,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 14:57:34,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:57:34,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 14:57:34,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-17 14:57:34,345 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 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 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-03-17 14:57:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:57:34,529 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-03-17 14:57:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 14:57:34,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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 19 [2022-03-17 14:57:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:57:34,535 INFO L225 Difference]: With dead ends: 37 [2022-03-17 14:57:34,536 INFO L226 Difference]: Without dead ends: 29 [2022-03-17 14:57:34,538 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-17 14:57:34,540 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:57:34,541 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:57:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-17 14:57:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-17 14:57:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 14:57:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-17 14:57:34,564 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 19 [2022-03-17 14:57:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:57:34,564 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-17 14:57:34,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-03-17 14:57:34,565 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-17 14:57:34,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 14:57:34,565 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:57:34,565 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:57:34,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 14:57:34,566 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:57:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:57:34,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1598286936, now seen corresponding path program 1 times [2022-03-17 14:57:34,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:57:34,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443660270] [2022-03-17 14:57:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:57:34,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:57:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:57:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 14:57:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:57:34,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:57:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443660270] [2022-03-17 14:57:34,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443660270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:57:34,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:57:34,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-17 14:57:34,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590769084] [2022-03-17 14:57:34,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:57:34,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 14:57:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:57:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 14:57:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-17 14:57:34,629 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 14:57:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:57:34,722 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-03-17 14:57:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 14:57:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 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 24 [2022-03-17 14:57:34,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:57:34,724 INFO L225 Difference]: With dead ends: 37 [2022-03-17 14:57:34,724 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 14:57:34,724 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-17 14:57:34,725 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:57:34,725 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 44 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:57:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 14:57:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-17 14:57:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 14:57:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-03-17 14:57:34,731 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2022-03-17 14:57:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:57:34,732 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-03-17 14:57:34,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 14:57:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-03-17 14:57:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 14:57:34,733 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:57:34,733 INFO L500 BasicCegarLoop]: trace histogram [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, 1] [2022-03-17 14:57:34,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 14:57:34,734 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:57:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:57:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1081273981, now seen corresponding path program 1 times [2022-03-17 14:57:34,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:57:34,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180545008] [2022-03-17 14:57:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:57:34,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:57:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:57:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 14:57:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 14:57:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-17 14:57:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 14:57:34,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:57:34,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180545008] [2022-03-17 14:57:34,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180545008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:57:34,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111637428] [2022-03-17 14:57:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:57:34,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:57:34,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:57:34,896 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) [2022-03-17 14:57:34,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 14:57:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:34,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 14:57:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:57:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 14:57:35,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:57:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 14:57:35,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111637428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:57:35,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:57:35,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-17 14:57:35,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141277181] [2022-03-17 14:57:35,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:57:35,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 14:57:35,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:57:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 14:57:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-17 14:57:35,377 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-17 14:57:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:57:35,666 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-03-17 14:57:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 14:57:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2022-03-17 14:57:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:57:35,667 INFO L225 Difference]: With dead ends: 51 [2022-03-17 14:57:35,667 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 14:57:35,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2022-03-17 14:57:35,668 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:57:35,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 65 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:57:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 14:57:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-17 14:57:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 14:57:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-03-17 14:57:35,674 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 37 [2022-03-17 14:57:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:57:35,674 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-03-17 14:57:35,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-17 14:57:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-03-17 14:57:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-17 14:57:35,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:57:35,676 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:57:35,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 14:57:35,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:57:35,892 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:57:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:57:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash 59588189, now seen corresponding path program 2 times [2022-03-17 14:57:35,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:57:35,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081408293] [2022-03-17 14:57:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:57:35,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:57:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:57:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 14:57:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 14:57:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-17 14:57:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 14:57:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-17 14:57:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 14:57:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-17 14:57:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 14:57:36,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:57:36,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081408293] [2022-03-17 14:57:36,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081408293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:57:36,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680738176] [2022-03-17 14:57:36,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 14:57:36,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:57:36,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:57:36,039 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) [2022-03-17 14:57:36,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 14:57:36,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 14:57:36,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:57:36,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 14:57:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:57:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 14:57:36,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:57:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-17 14:57:36,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680738176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:57:36,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:57:36,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 28 [2022-03-17 14:57:36,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070556260] [2022-03-17 14:57:36,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:57:36,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-17 14:57:36,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:57:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-17 14:57:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-03-17 14:57:36,596 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-03-17 14:57:37,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:57:37,009 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-17 14:57:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 14:57:37,010 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 63 [2022-03-17 14:57:37,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:57:37,010 INFO L225 Difference]: With dead ends: 54 [2022-03-17 14:57:37,011 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 14:57:37,011 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2022-03-17 14:57:37,012 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:57:37,012 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 77 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:57:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 14:57:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 14:57:37,013 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) [2022-03-17 14:57:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 14:57:37,013 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2022-03-17 14:57:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:57:37,013 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 14:57:37,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 25 states have internal predecessors, (50), 10 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2022-03-17 14:57:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 14:57:37,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 14:57:37,015 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 14:57:37,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 14:57:37,219 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,SelfDestructingSolverStorable3 [2022-03-17 14:57:37,222 INFO L718 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-03-17 14:57:37,223 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 14:57:37,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:57:37 BasicIcfg [2022-03-17 14:57:37,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 14:57:37,225 INFO L158 Benchmark]: Toolchain (without parser) took 3752.01ms. Allocated memory was 198.2MB in the beginning and 280.0MB in the end (delta: 81.8MB). Free memory was 143.5MB in the beginning and 141.8MB in the end (delta: 1.7MB). Peak memory consumption was 83.8MB. Max. memory is 8.0GB. [2022-03-17 14:57:37,225 INFO L158 Benchmark]: CDTParser took 0.53ms. Allocated memory is still 198.2MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 14:57:37,225 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.22ms. Allocated memory was 198.2MB in the beginning and 280.0MB in the end (delta: 81.8MB). Free memory was 143.4MB in the beginning and 250.9MB in the end (delta: -107.6MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. [2022-03-17 14:57:37,226 INFO L158 Benchmark]: Boogie Preprocessor took 18.58ms. Allocated memory is still 280.0MB. Free memory was 250.9MB in the beginning and 249.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 14:57:37,226 INFO L158 Benchmark]: RCFGBuilder took 283.31ms. Allocated memory is still 280.0MB. Free memory was 249.4MB in the beginning and 237.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 14:57:37,226 INFO L158 Benchmark]: IcfgTransformer took 17.79ms. Allocated memory is still 280.0MB. Free memory was 237.3MB in the beginning and 235.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 14:57:37,226 INFO L158 Benchmark]: TraceAbstraction took 3233.84ms. Allocated memory is still 280.0MB. Free memory was 235.2MB in the beginning and 141.8MB in the end (delta: 93.3MB). Peak memory consumption was 94.4MB. Max. memory is 8.0GB. [2022-03-17 14:57:37,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53ms. Allocated memory is still 198.2MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.22ms. Allocated memory was 198.2MB in the beginning and 280.0MB in the end (delta: 81.8MB). Free memory was 143.4MB in the beginning and 250.9MB in the end (delta: -107.6MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.58ms. Allocated memory is still 280.0MB. Free memory was 250.9MB in the beginning and 249.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 283.31ms. Allocated memory is still 280.0MB. Free memory was 249.4MB in the beginning and 237.3MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.79ms. Allocated memory is still 280.0MB. Free memory was 237.3MB in the beginning and 235.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 3233.84ms. Allocated memory is still 280.0MB. Free memory was 235.2MB in the beginning and 141.8MB in the end (delta: 93.3MB). Peak memory consumption was 94.4MB. 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: 19]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 162 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 158 mSDsluCounter, 246 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 143 mSDsCounter, 169 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 871 IncrementalHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 169 mSolverCounterUnsat, 103 mSDtfsCounter, 871 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 303 GetRequests, 204 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=3, InterpolantAutomatonStates: 52, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 1211 SizeOfPredicates, 16 NumberOfNonLiveVariables, 262 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 357/431 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! [2022-03-17 14:57:37,251 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...