/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/geo1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:25:11,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:25:11,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:25:11,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:25:11,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:25:11,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:25:11,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:25:11,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:25:11,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:25:11,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:25:11,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:25:11,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:25:11,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:25:11,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:25:11,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:25:11,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:25:11,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:25:11,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:25:11,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:25:11,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:25:11,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:25:11,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:25:11,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:25:11,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:25:11,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 13:25:11,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:25:11,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:25:11,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:25:11,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:25:11,703 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:25:11,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:25:11,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:25:11,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:25:11,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:25:11,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:25:11,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:25:11,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:25:11,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:25:11,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:25:11,707 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:25:11,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:25:11,707 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:25:11,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:25:11,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:25:11,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:25:11,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:25:11,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:25:11,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:25:11,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:25:11,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:25:11,709 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:25:11,709 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:25:11,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:25:11,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:25:11,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:25:11,942 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:25:11,943 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:25:11,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo1-ll.c [2022-01-31 13:25:12,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711066856/5b0094baefb84ffdb8f57bdf6473eba9/FLAG01cddae4b [2022-01-31 13:25:12,376 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:25:12,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1-ll.c [2022-01-31 13:25:12,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711066856/5b0094baefb84ffdb8f57bdf6473eba9/FLAG01cddae4b [2022-01-31 13:25:12,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711066856/5b0094baefb84ffdb8f57bdf6473eba9 [2022-01-31 13:25:12,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:25:12,805 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:25:12,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:25:12,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:25:12,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:25:12,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:25:12" (1/1) ... [2022-01-31 13:25:12,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2faaab2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:12, skipping insertion in model container [2022-01-31 13:25:12,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:25:12" (1/1) ... [2022-01-31 13:25:12,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:25:12,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:25:12,936 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/geo1-ll.c[546,559] [2022-01-31 13:25:12,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:25:12,985 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:25:12,994 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/geo1-ll.c[546,559] [2022-01-31 13:25:12,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:25:13,008 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:25:13,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13 WrapperNode [2022-01-31 13:25:13,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:25:13,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:25:13,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:25:13,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:25:13,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,024 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:25:13,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:25:13,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:25:13,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:25:13,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:25:13,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:25:13,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 13:25:13,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 13:25:13,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:25:13,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:25:13,114 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:25:13,114 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 13:25:13,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:25:13,114 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:25:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:25:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:25:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:25:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:25:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 13:25:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 13:25:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:25:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:25:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:25:13,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:25:13,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:25:13,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:25:13,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:25:13,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:25:13,177 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:25:13,179 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:25:13,253 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:25:13,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:25:13,259 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 13:25:13,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:25:13 BoogieIcfgContainer [2022-01-31 13:25:13,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:25:13,261 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:25:13,261 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:25:13,262 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:25:13,265 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:25:13" (1/1) ... [2022-01-31 13:25:13,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:25:13 BasicIcfg [2022-01-31 13:25:13,283 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:25:13,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:25:13,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:25:13,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:25:13,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:25:12" (1/4) ... [2022-01-31 13:25:13,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bb9061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:25:13, skipping insertion in model container [2022-01-31 13:25:13,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:25:13" (2/4) ... [2022-01-31 13:25:13,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bb9061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:25:13, skipping insertion in model container [2022-01-31 13:25:13,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:25:13" (3/4) ... [2022-01-31 13:25:13,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9bb9061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:25:13, skipping insertion in model container [2022-01-31 13:25:13,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:25:13" (4/4) ... [2022-01-31 13:25:13,290 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll.cJordan [2022-01-31 13:25:13,294 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:25:13,294 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:25:13,344 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:25:13,350 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 13:25:13,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:25:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 13:25:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 13:25:13,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:25:13,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:25:13,367 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:25:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:25:13,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1592337452, now seen corresponding path program 1 times [2022-01-31 13:25:13,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:25:13,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654710521] [2022-01-31 13:25:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:25:13,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:25:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:25:13,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:25:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:25:13,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 13:25:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:25:13,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 13:25:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:25:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:25:13,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:25:13,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654710521] [2022-01-31 13:25:13,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654710521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:25:13,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:25:13,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:25:13,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101117900] [2022-01-31 13:25:13,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:25:13,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:25:13,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:25:13,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:25:13,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:25:13,581 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 13:25:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:25:13,621 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-01-31 13:25:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:25:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 13:25:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:25:13,628 INFO L225 Difference]: With dead ends: 29 [2022-01-31 13:25:13,628 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 13:25:13,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:25:13,632 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:25:13,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:25:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 13:25:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 13:25:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 13:25:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-31 13:25:13,659 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 22 [2022-01-31 13:25:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:25:13,660 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-31 13:25:13,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 13:25:13,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-31 13:25:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 13:25:13,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:25:13,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:25:13,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:25:13,662 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:25:13,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:25:13,663 INFO L85 PathProgramCache]: Analyzing trace with hash -720675636, now seen corresponding path program 1 times [2022-01-31 13:25:13,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:25:13,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280098901] [2022-01-31 13:25:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:25:13,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:25:13,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:25:13,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596219060] [2022-01-31 13:25:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:25:13,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:25:13,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:25:13,702 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:25:13,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 13:25:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:25:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:25:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:25:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:25:13,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:25:13,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:25:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280098901] [2022-01-31 13:25:13,942 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:25:13,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596219060] [2022-01-31 13:25:13,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596219060] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:25:13,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:25:13,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 13:25:13,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898610044] [2022-01-31 13:25:13,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:25:13,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 13:25:13,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:25:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 13:25:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 13:25:13,952 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 13:25:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:25:13,993 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-01-31 13:25:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 13:25:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-01-31 13:25:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:25:13,995 INFO L225 Difference]: With dead ends: 32 [2022-01-31 13:25:13,995 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 13:25:13,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:25:13,996 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:25:13,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 84 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:25:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 13:25:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-01-31 13:25:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 13:25:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-31 13:25:14,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2022-01-31 13:25:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:25:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-31 13:25:14,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 13:25:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-31 13:25:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 13:25:14,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:25:14,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:25:14,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 13:25:14,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:25:14,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:25:14,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:25:14,229 INFO L85 PathProgramCache]: Analyzing trace with hash 764954199, now seen corresponding path program 1 times [2022-01-31 13:25:14,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:25:14,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335956572] [2022-01-31 13:25:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:25:14,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:25:14,261 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:25:14,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274384335] [2022-01-31 13:25:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:25:14,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:25:14,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:25:14,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 13:25:14,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 13:25:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:25:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 13:25:14,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:25:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:25:14,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:25:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 13:25:14,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:25:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335956572] [2022-01-31 13:25:14,658 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:25:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274384335] [2022-01-31 13:25:14,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274384335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:25:14,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:25:14,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-01-31 13:25:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52425169] [2022-01-31 13:25:14,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:25:14,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 13:25:14,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:25:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 13:25:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-31 13:25:14,662 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 13:25:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:25:14,775 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-01-31 13:25:14,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:25:14,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-01-31 13:25:14,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:25:14,776 INFO L225 Difference]: With dead ends: 28 [2022-01-31 13:25:14,776 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 13:25:14,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:25:14,778 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:25:14,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:25:14,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 13:25:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 13:25:14,779 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) [2022-01-31 13:25:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 13:25:14,779 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-01-31 13:25:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:25:14,780 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 13:25:14,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 13:25:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 13:25:14,780 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 13:25:14,782 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 13:25:14,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 13:25:14,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 13:25:15,002 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-31 13:25:15,003 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 13:25:15,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:25:15 BasicIcfg [2022-01-31 13:25:15,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 13:25:15,006 INFO L158 Benchmark]: Toolchain (without parser) took 2200.88ms. Allocated memory is still 201.3MB. Free memory was 153.0MB in the beginning and 98.6MB in the end (delta: 54.4MB). Peak memory consumption was 54.7MB. Max. memory is 8.0GB. [2022-01-31 13:25:15,006 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 169.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 13:25:15,006 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.82ms. Allocated memory is still 201.3MB. Free memory was 152.8MB in the beginning and 179.4MB in the end (delta: -26.5MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. [2022-01-31 13:25:15,007 INFO L158 Benchmark]: Boogie Preprocessor took 24.34ms. Allocated memory is still 201.3MB. Free memory was 179.4MB in the beginning and 177.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 13:25:15,007 INFO L158 Benchmark]: RCFGBuilder took 226.58ms. Allocated memory is still 201.3MB. Free memory was 177.8MB in the beginning and 167.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 13:25:15,007 INFO L158 Benchmark]: IcfgTransformer took 22.09ms. Allocated memory is still 201.3MB. Free memory was 167.7MB in the beginning and 166.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 13:25:15,008 INFO L158 Benchmark]: TraceAbstraction took 1720.62ms. Allocated memory is still 201.3MB. Free memory was 165.7MB in the beginning and 98.6MB in the end (delta: 67.1MB). Peak memory consumption was 67.1MB. Max. memory is 8.0GB. [2022-01-31 13:25:15,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 201.3MB. Free memory is still 169.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.82ms. Allocated memory is still 201.3MB. Free memory was 152.8MB in the beginning and 179.4MB in the end (delta: -26.5MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.34ms. Allocated memory is still 201.3MB. Free memory was 179.4MB in the beginning and 177.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 226.58ms. Allocated memory is still 201.3MB. Free memory was 177.8MB in the beginning and 167.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 22.09ms. Allocated memory is still 201.3MB. Free memory was 167.7MB in the beginning and 166.5MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1720.62ms. Allocated memory is still 201.3MB. Free memory was 165.7MB in the beginning and 98.6MB in the end (delta: 67.1MB). Peak memory consumption was 67.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 215 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 147 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54 IncrementalHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 68 mSDtfsCounter, 54 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 14, 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 73 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 98 ConstructedInterpolants, 1 QuantifiedInterpolants, 202 SizeOfPredicates, 4 NumberOfNonLiveVariables, 174 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 18/20 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! [2022-01-31 13:25:15,027 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...