/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 07:00:43,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 07:00:43,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 07:00:43,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 07:00:43,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 07:00:43,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 07:00:43,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 07:00:43,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 07:00:43,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 07:00:43,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 07:00:43,601 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 07:00:43,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 07:00:43,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 07:00:43,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 07:00:43,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 07:00:43,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 07:00:43,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 07:00:43,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 07:00:43,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 07:00:43,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 07:00:43,609 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 07:00:43,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 07:00:43,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 07:00:43,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 07:00:43,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 07:00:43,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 07:00:43,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 07:00:43,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 07:00:43,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 07:00:43,639 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 07:00:43,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 07:00:43,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 07:00:43,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 07:00:43,651 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 07:00:43,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 07:00:43,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 07:00:43,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 07:00:43,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 07:00:43,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 07:00:43,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 07:00:43,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 07:00:43,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 07:00:43,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 07:00:43,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 07:00:43,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 07:00:43,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 07:00:43,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 07:00:43,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 07:00:43,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:00:43,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 07:00:43,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 07:00:43,654 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 07:00:43,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 07:00:43,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 07:00:43,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 07:00:43,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 07:00:43,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 07:00:43,909 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 07:00:43,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound50.c [2022-03-20 07:00:43,960 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243d4d4e1/8ca1d39cebff4691b5fcb285c549618f/FLAG193a8cf7e [2022-03-20 07:00:44,337 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 07:00:44,338 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound50.c [2022-03-20 07:00:44,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243d4d4e1/8ca1d39cebff4691b5fcb285c549618f/FLAG193a8cf7e [2022-03-20 07:00:44,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/243d4d4e1/8ca1d39cebff4691b5fcb285c549618f [2022-03-20 07:00:44,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 07:00:44,753 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 07:00:44,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 07:00:44,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 07:00:44,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 07:00:44,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:00:44" (1/1) ... [2022-03-20 07:00:44,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c42e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:44, skipping insertion in model container [2022-03-20 07:00:44,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:00:44" (1/1) ... [2022-03-20 07:00:44,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 07:00:44,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 07:00:44,980 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound50.c[454,467] [2022-03-20 07:00:44,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:00:45,005 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 07:00:45,016 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound50.c[454,467] [2022-03-20 07:00:45,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:00:45,033 INFO L208 MainTranslator]: Completed translation [2022-03-20 07:00:45,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45 WrapperNode [2022-03-20 07:00:45,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 07:00:45,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 07:00:45,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 07:00:45,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 07:00:45,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 07:00:45,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 07:00:45,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 07:00:45,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 07:00:45,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:00:45,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:00:45,104 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) [2022-03-20 07:00:45,127 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 [2022-03-20 07:00:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 07:00:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 07:00:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 07:00:45,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 07:00:45,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 07:00:45,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 07:00:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 07:00:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 07:00:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 07:00:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 07:00:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 07:00:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 07:00:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 07:00:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 07:00:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 07:00:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 07:00:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 07:00:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 07:00:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 07:00:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 07:00:45,205 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 07:00:45,207 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 07:00:45,337 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 07:00:45,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 07:00:45,342 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 07:00:45,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:00:45 BoogieIcfgContainer [2022-03-20 07:00:45,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 07:00:45,344 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 07:00:45,344 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 07:00:45,360 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 07:00:45,363 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:00:45" (1/1) ... [2022-03-20 07:00:45,364 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 07:00:45,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:00:45 BasicIcfg [2022-03-20 07:00:45,375 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 07:00:45,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 07:00:45,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 07:00:45,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 07:00:45,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:00:44" (1/4) ... [2022-03-20 07:00:45,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a1cd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:00:45, skipping insertion in model container [2022-03-20 07:00:45,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:00:45" (2/4) ... [2022-03-20 07:00:45,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a1cd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:00:45, skipping insertion in model container [2022-03-20 07:00:45,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:00:45" (3/4) ... [2022-03-20 07:00:45,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a1cd36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:00:45, skipping insertion in model container [2022-03-20 07:00:45,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:00:45" (4/4) ... [2022-03-20 07:00:45,382 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound50.cJordan [2022-03-20 07:00:45,386 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 07:00:45,386 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 07:00:45,420 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 07:00:45,425 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 [2022-03-20 07:00:45,425 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 07:00:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 07:00:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 07:00:45,455 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:00:45,456 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:00:45,456 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:00:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:00:45,461 INFO L85 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2022-03-20 07:00:45,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:00:45,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143042403] [2022-03-20 07:00:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:00:45,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:00:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:00:45,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:00:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:00:45,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 07:00:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:00:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:00:45,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:00:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143042403] [2022-03-20 07:00:45,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143042403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:00:45,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:00:45,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 07:00:45,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370964486] [2022-03-20 07:00:45,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:00:45,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 07:00:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:00:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 07:00:45,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 07:00:45,695 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:00:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:00:45,749 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-03-20 07:00:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 07:00:45,751 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 07:00:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:00:45,760 INFO L225 Difference]: With dead ends: 27 [2022-03-20 07:00:45,760 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 07:00:45,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 07:00:45,766 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:00:45,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:00:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 07:00:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-20 07:00:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 07:00:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-03-20 07:00:45,799 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-03-20 07:00:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:00:45,800 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-03-20 07:00:45,800 INFO L479 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:00:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-03-20 07:00:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 07:00:45,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:00:45,802 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:00:45,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 07:00:45,803 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:00:45,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:00:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2022-03-20 07:00:45,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:00:45,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458003363] [2022-03-20 07:00:45,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:00:45,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:00:45,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:00:45,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631520699] [2022-03-20 07:00:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:00:45,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:00:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:00:45,843 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) [2022-03-20 07:00:45,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 07:00:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:00:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 07:00:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:00:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:00:45,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 07:00:45,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:00:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458003363] [2022-03-20 07:00:45,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:00:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631520699] [2022-03-20 07:00:45,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631520699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:00:45,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:00:45,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 07:00:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851800265] [2022-03-20 07:00:45,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:00:45,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 07:00:45,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:00:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 07:00:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:00:45,992 INFO L87 Difference]: Start difference. First operand 22 states and 23 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:00:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:00:46,019 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-03-20 07:00:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 07:00:46,020 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 07:00:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:00:46,021 INFO L225 Difference]: With dead ends: 30 [2022-03-20 07:00:46,021 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 07:00:46,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 07:00:46,022 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:00:46,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:00:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 07:00:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 07:00:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 07:00:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-20 07:00:46,028 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2022-03-20 07:00:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:00:46,029 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-20 07:00:46,029 INFO L479 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 07:00:46,029 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-20 07:00:46,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 07:00:46,030 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:00:46,030 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:00:46,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 07:00:46,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:00:46,244 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:00:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:00:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2022-03-20 07:00:46,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:00:46,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565774023] [2022-03-20 07:00:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:00:46,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:00:46,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 07:00:46,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625355649] [2022-03-20 07:00:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:00:46,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 07:00:46,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:00:46,258 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) [2022-03-20 07:00:46,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 07:00:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:00:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 07:00:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 07:00:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:00:46,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 07:00:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 07:00:46,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:00:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565774023] [2022-03-20 07:00:46,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 07:00:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625355649] [2022-03-20 07:00:46,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625355649] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 07:00:46,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 07:00:46,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-20 07:00:46,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555643613] [2022-03-20 07:00:46,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:00:46,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 07:00:46,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:00:46,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 07:00:46,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 07:00:46,536 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 07:00:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:00:46,555 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-03-20 07:00:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 07:00:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-20 07:00:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:00:46,556 INFO L225 Difference]: With dead ends: 27 [2022-03-20 07:00:46,557 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 07:00:46,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 07:00:46,558 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:00:46,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:00:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 07:00:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 07:00:46,560 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) [2022-03-20 07:00:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 07:00:46,560 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-03-20 07:00:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:00:46,560 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 07:00:46,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 07:00:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 07:00:46,561 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 07:00:46,563 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 07:00:46,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 07:00:46,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 07:00:46,789 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-03-20 07:00:46,791 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 07:00:46,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:00:46 BasicIcfg [2022-03-20 07:00:46,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 07:00:46,795 INFO L158 Benchmark]: Toolchain (without parser) took 2042.33ms. Allocated memory was 188.7MB in the beginning and 268.4MB in the end (delta: 79.7MB). Free memory was 135.6MB in the beginning and 233.5MB in the end (delta: -97.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 07:00:46,795 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 188.7MB. Free memory is still 151.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 07:00:46,796 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.58ms. Allocated memory is still 188.7MB. Free memory was 135.4MB in the beginning and 165.2MB in the end (delta: -29.8MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-03-20 07:00:46,796 INFO L158 Benchmark]: Boogie Preprocessor took 35.71ms. Allocated memory is still 188.7MB. Free memory was 165.2MB in the beginning and 163.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 07:00:46,796 INFO L158 Benchmark]: RCFGBuilder took 271.13ms. Allocated memory is still 188.7MB. Free memory was 163.7MB in the beginning and 154.1MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 07:00:46,797 INFO L158 Benchmark]: IcfgTransformer took 31.33ms. Allocated memory is still 188.7MB. Free memory was 154.1MB in the beginning and 152.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 07:00:46,797 INFO L158 Benchmark]: TraceAbstraction took 1418.25ms. Allocated memory was 188.7MB in the beginning and 268.4MB in the end (delta: 79.7MB). Free memory was 152.3MB in the beginning and 233.5MB in the end (delta: -81.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 07:00:46,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 188.7MB. Free memory is still 151.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 279.58ms. Allocated memory is still 188.7MB. Free memory was 135.4MB in the beginning and 165.2MB in the end (delta: -29.8MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.71ms. Allocated memory is still 188.7MB. Free memory was 165.2MB in the beginning and 163.7MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 271.13ms. Allocated memory is still 188.7MB. Free memory was 163.7MB in the beginning and 154.1MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 31.33ms. Allocated memory is still 188.7MB. Free memory was 154.1MB in the beginning and 152.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 1418.25ms. Allocated memory was 188.7MB in the beginning and 268.4MB in the end (delta: 79.7MB). Free memory was 152.3MB in the beginning and 233.5MB in the end (delta: -81.3MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, 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, 31 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 164 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 102 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34 IncrementalHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 62 mSDtfsCounter, 34 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, InterpolantAutomatonStates: 13, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 186 SizeOfPredicates, 2 NumberOfNonLiveVariables, 153 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 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! [2022-03-20 07:00:46,828 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...