/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:54:27,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:54:27,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:54:27,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:54:27,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:54:27,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:54:27,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:54:27,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:54:27,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:54:27,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:54:27,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:54:27,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:54:27,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:54:27,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:54:27,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:54:27,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:54:27,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 21:54:27,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:54:27,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:54:27,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:54:27,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 21:54:27,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:54:27,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:54:27,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:54:27,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:54:27,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:54:27,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:54:27,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:54:27,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:54:27,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:54:27,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:54:27,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:54:27,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:54:27,877 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:54:27,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:54:27,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:54:27,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:54:27,878 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:54:27,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:54:27,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:54:27,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:54:27,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:54:27,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:54:27,879 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:54:27,879 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:54:28,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:54:28,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:54:28,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:54:28,073 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:54:28,075 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:54:28,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound20.c [2022-01-31 21:54:28,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c93d2466/3891cca6de8d4c6e9fcda4f4cbb6fa87/FLAG83a40fdd1 [2022-01-31 21:54:28,430 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:54:28,431 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound20.c [2022-01-31 21:54:28,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c93d2466/3891cca6de8d4c6e9fcda4f4cbb6fa87/FLAG83a40fdd1 [2022-01-31 21:54:28,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c93d2466/3891cca6de8d4c6e9fcda4f4cbb6fa87 [2022-01-31 21:54:28,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:54:28,879 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:54:28,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:54:28,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:54:28,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:54:28,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:54:28" (1/1) ... [2022-01-31 21:54:28,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@232f49a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:28, skipping insertion in model container [2022-01-31 21:54:28,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:54:28" (1/1) ... [2022-01-31 21:54:28,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:54:28,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:54:29,022 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/hard2_valuebound20.c[526,539] [2022-01-31 21:54:29,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:54:29,038 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:54:29,049 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/hard2_valuebound20.c[526,539] [2022-01-31 21:54:29,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:54:29,065 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:54:29,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29 WrapperNode [2022-01-31 21:54:29,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:54:29,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:54:29,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:54:29,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:54:29,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (1/1) ... [2022-01-31 21:54:29,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (1/1) ... [2022-01-31 21:54:29,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (1/1) ... [2022-01-31 21:54:29,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (1/1) ... [2022-01-31 21:54:29,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (1/1) ... [2022-01-31 21:54:29,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (1/1) ... [2022-01-31 21:54:29,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (1/1) ... [2022-01-31 21:54:29,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:54:29,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:54:29,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:54:29,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:54:29,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (1/1) ... [2022-01-31 21:54:29,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:54:29,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:54:29,146 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 21:54:29,154 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 21:54:29,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:54:29,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:54:29,177 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:54:29,177 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 21:54:29,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:54:29,178 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:54:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:54:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:54:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:54:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:54:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 21:54:29,178 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 21:54:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:54:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:54:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:54:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:54:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:54:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:54:29,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:54:29,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:54:29,228 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:54:29,229 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:54:29,324 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:54:29,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:54:29,330 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 21:54:29,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:54:29 BoogieIcfgContainer [2022-01-31 21:54:29,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:54:29,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:54:29,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:54:29,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:54:29,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:54:28" (1/3) ... [2022-01-31 21:54:29,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b18800c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:54:29, skipping insertion in model container [2022-01-31 21:54:29,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:54:29" (2/3) ... [2022-01-31 21:54:29,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b18800c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:54:29, skipping insertion in model container [2022-01-31 21:54:29,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:54:29" (3/3) ... [2022-01-31 21:54:29,363 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound20.c [2022-01-31 21:54:29,367 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:54:29,368 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:54:29,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:54:29,442 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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=JORDAN [2022-01-31 21:54:29,443 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:54:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 21:54:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 21:54:29,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:54:29,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:54:29,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:54:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:54:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-01-31 21:54:29,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:54:29,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875226968] [2022-01-31 21:54:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:54:29,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:54:29,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:54:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:29,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:54:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:29,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 21:54:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:54:29,683 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:54:29,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875226968] [2022-01-31 21:54:29,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875226968] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:54:29,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:54:29,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 21:54:29,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310252910] [2022-01-31 21:54:29,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:54:29,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 21:54:29,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:54:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 21:54:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 21:54:29,725 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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) [2022-01-31 21:54:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:54:29,832 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-01-31 21:54:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 21:54:29,837 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 [2022-01-31 21:54:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:54:29,846 INFO L225 Difference]: With dead ends: 61 [2022-01-31 21:54:29,846 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 21:54:29,850 INFO L932 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 [2022-01-31 21:54:29,857 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:54:29,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:54:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 21:54:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 21:54:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 21:54:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-01-31 21:54:29,905 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-01-31 21:54:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:54:29,905 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-01-31 21:54:29,905 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, (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) [2022-01-31 21:54:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-01-31 21:54:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 21:54:29,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:54:29,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:54:29,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:54:29,907 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:54:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:54:29,908 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-01-31 21:54:29,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:54:29,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457353149] [2022-01-31 21:54:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:54:29,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:54:29,913 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:54:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:54:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:30,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 21:54:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:54:30,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:54:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457353149] [2022-01-31 21:54:30,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1457353149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:54:30,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:54:30,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:54:30,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461405830] [2022-01-31 21:54:30,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:54:30,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:54:30,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:54:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:54:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 21:54:30,041 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 21:54:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:54:30,211 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-01-31 21:54:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 21:54:30,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 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 [2022-01-31 21:54:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:54:30,213 INFO L225 Difference]: With dead ends: 43 [2022-01-31 21:54:30,213 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 21:54:30,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:54:30,215 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:54:30,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:54:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 21:54:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-01-31 21:54:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 21:54:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-01-31 21:54:30,230 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-01-31 21:54:30,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:54:30,231 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-01-31 21:54:30,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 21:54:30,231 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-01-31 21:54:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:54:30,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:54:30,232 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:54:30,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:54:30,232 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:54:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:54:30,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-01-31 21:54:30,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:54:30,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848046459] [2022-01-31 21:54:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:54:30,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:54:30,235 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:54:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:30,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:54:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:30,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 21:54:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-31 21:54:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:54:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:54:30,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:54:30,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848046459] [2022-01-31 21:54:30,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [848046459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:54:30,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:54:30,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:54:30,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674978060] [2022-01-31 21:54:30,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:54:30,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:54:30,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:54:30,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:54:30,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 21:54:30,296 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 21:54:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:54:30,437 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-01-31 21:54:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 21:54:30,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 22 [2022-01-31 21:54:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:54:30,439 INFO L225 Difference]: With dead ends: 47 [2022-01-31 21:54:30,439 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 21:54:30,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:54:30,451 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:54:30,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:54:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 21:54:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-01-31 21:54:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 21:54:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-01-31 21:54:30,460 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-01-31 21:54:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:54:30,460 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-01-31 21:54:30,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 21:54:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-01-31 21:54:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 21:54:30,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:54:30,462 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:54:30,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:54:30,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:54:30,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:54:30,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-01-31 21:54:30,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:54:30,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458268138] [2022-01-31 21:54:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:54:30,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:54:30,464 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:54:30,474 WARN L127 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-01-31 21:54:30,474 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-01-31 21:54:30,479 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 21:54:30,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:54:30,483 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-01-31 21:54:30,485 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 21:54:30,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:54:30 BoogieIcfgContainer [2022-01-31 21:54:30,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 21:54:30,495 INFO L158 Benchmark]: Toolchain (without parser) took 1615.27ms. Allocated memory was 189.8MB in the beginning and 239.1MB in the end (delta: 49.3MB). Free memory was 134.8MB in the beginning and 137.9MB in the end (delta: -3.1MB). Peak memory consumption was 45.8MB. Max. memory is 8.0GB. [2022-01-31 21:54:30,495 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 189.8MB. Free memory is still 151.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 21:54:30,495 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.38ms. Allocated memory was 189.8MB in the beginning and 239.1MB in the end (delta: 49.3MB). Free memory was 134.6MB in the beginning and 212.9MB in the end (delta: -78.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-01-31 21:54:30,496 INFO L158 Benchmark]: Boogie Preprocessor took 45.46ms. Allocated memory is still 239.1MB. Free memory was 212.9MB in the beginning and 210.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 21:54:30,496 INFO L158 Benchmark]: RCFGBuilder took 219.24ms. Allocated memory is still 239.1MB. Free memory was 210.8MB in the beginning and 199.2MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 21:54:30,497 INFO L158 Benchmark]: TraceAbstraction took 1146.06ms. Allocated memory is still 239.1MB. Free memory was 198.7MB in the beginning and 137.9MB in the end (delta: 60.8MB). Peak memory consumption was 60.8MB. Max. memory is 8.0GB. [2022-01-31 21:54:30,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 189.8MB. Free memory is still 151.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 185.38ms. Allocated memory was 189.8MB in the beginning and 239.1MB in the end (delta: 49.3MB). Free memory was 134.6MB in the beginning and 212.9MB in the end (delta: -78.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.46ms. Allocated memory is still 239.1MB. Free memory was 212.9MB in the beginning and 210.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 219.24ms. Allocated memory is still 239.1MB. Free memory was 210.8MB in the beginning and 199.2MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1146.06ms. Allocated memory is still 239.1MB. Free memory was 198.7MB in the beginning and 137.9MB in the end (delta: 60.8MB). Peak memory consumption was 60.8MB. 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 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] int A, B; [L24] int r, d, p, q; [L25] A = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(A>=0 && A<=20) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=20) [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 105 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 89 mSDsluCounter, 128 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 234 IncrementalHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 91 mSDtfsCounter, 234 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-01-31 21:54:30,524 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...