/usr/bin/java -ea -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/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-08 03:34:57,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-08 03:34:57,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-08 03:34:57,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-08 03:34:57,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-08 03:34:57,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-08 03:34:57,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-08 03:34:57,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-08 03:34:57,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-08 03:34:57,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-08 03:34:57,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-08 03:34:57,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-08 03:34:57,114 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-08 03:34:57,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-08 03:34:57,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-08 03:34:57,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-08 03:34:57,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-08 03:34:57,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-08 03:34:57,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-08 03:34:57,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-08 03:34:57,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-08 03:34:57,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-08 03:34:57,168 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-08 03:34:57,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-08 03:34:57,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-08 03:34:57,170 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-08 03:34:57,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-08 03:34:57,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-08 03:34:57,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-08 03:34:57,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-08 03:34:57,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-08 03:34:57,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-08 03:34:57,172 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-08 03:34:57,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-08 03:34:57,172 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-08 03:34:57,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-08 03:34:57,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-08 03:34:57,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-08 03:34:57,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-08 03:34:57,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-08 03:34:57,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 03:34:57,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-08 03:34:57,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-08 03:34:57,173 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-08 03:34:57,173 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-08 03:34:57,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-08 03:34:57,173 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-08 03:34:57,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-08 03:34:57,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-08 03:34:57,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-08 03:34:57,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-08 03:34:57,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-08 03:34:57,488 INFO L275 PluginConnector]: CDTParser initialized [2022-04-08 03:34:57,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2022-04-08 03:34:57,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83bc6c915/99d236acb5e64507a6ae274b88c4256b/FLAG093cb45c4 [2022-04-08 03:34:58,035 INFO L306 CDTParser]: Found 1 translation units. [2022-04-08 03:34:58,036 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2022-04-08 03:34:58,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83bc6c915/99d236acb5e64507a6ae274b88c4256b/FLAG093cb45c4 [2022-04-08 03:34:58,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83bc6c915/99d236acb5e64507a6ae274b88c4256b [2022-04-08 03:34:58,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-08 03:34:58,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-08 03:34:58,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-08 03:34:58,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-08 03:34:58,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-08 03:34:58,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65ec8d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58, skipping insertion in model container [2022-04-08 03:34:58,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-08 03:34:58,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-08 03:34:58,319 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2022-04-08 03:34:58,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 03:34:58,362 INFO L203 MainTranslator]: Completed pre-run [2022-04-08 03:34:58,378 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c[416,429] [2022-04-08 03:34:58,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 03:34:58,403 INFO L208 MainTranslator]: Completed translation [2022-04-08 03:34:58,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58 WrapperNode [2022-04-08 03:34:58,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-08 03:34:58,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-08 03:34:58,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-08 03:34:58,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-08 03:34:58,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-08 03:34:58,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-08 03:34:58,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-08 03:34:58,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-08 03:34:58,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (1/1) ... [2022-04-08 03:34:58,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 03:34:58,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 03:34:58,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-08 03:34:58,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-08 03:34:58,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-08 03:34:58,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-08 03:34:58,539 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-08 03:34:58,539 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-08 03:34:58,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-08 03:34:58,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-08 03:34:58,539 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-08 03:34:58,540 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-08 03:34:58,540 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-08 03:34:58,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-08 03:34:58,541 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-08 03:34:58,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-08 03:34:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-08 03:34:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-08 03:34:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-08 03:34:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-08 03:34:58,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-08 03:34:58,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-08 03:34:58,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-08 03:34:58,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-08 03:34:58,619 INFO L234 CfgBuilder]: Building ICFG [2022-04-08 03:34:58,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-08 03:34:58,811 INFO L275 CfgBuilder]: Performing block encoding [2022-04-08 03:34:58,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-08 03:34:58,817 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-08 03:34:58,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 03:34:58 BoogieIcfgContainer [2022-04-08 03:34:58,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-08 03:34:58,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-08 03:34:58,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-08 03:34:58,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-08 03:34:58,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.04 03:34:58" (1/3) ... [2022-04-08 03:34:58,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8a6414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 03:34:58, skipping insertion in model container [2022-04-08 03:34:58,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 03:34:58" (2/3) ... [2022-04-08 03:34:58,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8a6414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 03:34:58, skipping insertion in model container [2022-04-08 03:34:58,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 03:34:58" (3/3) ... [2022-04-08 03:34:58,827 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2022-04-08 03:34:58,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-08 03:34:58,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-08 03:34:58,878 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-08 03:34:58,887 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, 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 [2022-04-08 03:34:58,888 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-08 03:34:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 03:34:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-08 03:34:58,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 03:34:58,924 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 03:34:58,925 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 03:34:58,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 03:34:58,934 INFO L85 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2022-04-08 03:34:58,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 03:34:58,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613190496] [2022-04-08 03:34:58,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 03:34:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 2 times [2022-04-08 03:34:58,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 03:34:58,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728288104] [2022-04-08 03:34:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 03:34:58,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 03:34:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:34:59,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 03:34:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:34:59,178 INFO L290 TraceCheckUtils]: 0: Hoare triple {32#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {27#true} is VALID [2022-04-08 03:34:59,178 INFO L290 TraceCheckUtils]: 1: Hoare triple {27#true} assume true; {27#true} is VALID [2022-04-08 03:34:59,179 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {27#true} {27#true} #60#return; {27#true} is VALID [2022-04-08 03:34:59,181 INFO L272 TraceCheckUtils]: 0: Hoare triple {27#true} call ULTIMATE.init(); {32#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 03:34:59,181 INFO L290 TraceCheckUtils]: 1: Hoare triple {32#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {27#true} is VALID [2022-04-08 03:34:59,181 INFO L290 TraceCheckUtils]: 2: Hoare triple {27#true} assume true; {27#true} is VALID [2022-04-08 03:34:59,181 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {27#true} {27#true} #60#return; {27#true} is VALID [2022-04-08 03:34:59,182 INFO L272 TraceCheckUtils]: 4: Hoare triple {27#true} call #t~ret7 := main(); {27#true} is VALID [2022-04-08 03:34:59,182 INFO L290 TraceCheckUtils]: 5: Hoare triple {27#true} ~i~0 := 0;~x~0 := 0;~y~0 := 0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~n~0 := #t~nondet4;havoc #t~nondet4; {27#true} is VALID [2022-04-08 03:34:59,182 INFO L290 TraceCheckUtils]: 6: Hoare triple {27#true} assume !!(~n~0 > 0);~i~0 := 0; {27#true} is VALID [2022-04-08 03:34:59,183 INFO L290 TraceCheckUtils]: 7: Hoare triple {27#true} assume !true; {28#false} is VALID [2022-04-08 03:34:59,183 INFO L272 TraceCheckUtils]: 8: Hoare triple {28#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {28#false} is VALID [2022-04-08 03:34:59,184 INFO L290 TraceCheckUtils]: 9: Hoare triple {28#false} ~cond := #in~cond; {28#false} is VALID [2022-04-08 03:34:59,184 INFO L290 TraceCheckUtils]: 10: Hoare triple {28#false} assume 0 == ~cond; {28#false} is VALID [2022-04-08 03:34:59,184 INFO L290 TraceCheckUtils]: 11: Hoare triple {28#false} assume !false; {28#false} is VALID [2022-04-08 03:34:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 03:34:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 03:34:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728288104] [2022-04-08 03:34:59,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728288104] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 03:34:59,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 03:34:59,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 03:34:59,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 03:34:59,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1613190496] [2022-04-08 03:34:59,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1613190496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 03:34:59,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 03:34:59,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 03:34:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355227760] [2022-04-08 03:34:59,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 03:34:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-08 03:34:59,197 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 03:34:59,201 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:34:59,224 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:34:59,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-08 03:34:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 03:34:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-08 03:34:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 03:34:59,263 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 16 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:34:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:34:59,417 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-04-08 03:34:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-08 03:34:59,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-08 03:34:59,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 03:34:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:34:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-04-08 03:34:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:34:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-04-08 03:34:59,445 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 55 transitions. [2022-04-08 03:34:59,571 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:34:59,583 INFO L225 Difference]: With dead ends: 41 [2022-04-08 03:34:59,583 INFO L226 Difference]: Without dead ends: 20 [2022-04-08 03:34:59,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 03:34:59,599 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 [2022-04-08 03:34:59,600 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] [2022-04-08 03:34:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-08 03:34:59,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-08 03:34:59,667 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 03:34:59,668 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 03:34:59,669 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 03:34:59,669 INFO L87 Difference]: Start difference. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 03:34:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:34:59,673 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-04-08 03:34:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-08 03:34:59,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 03:34:59,674 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 03:34:59,674 INFO L74 IsIncluded]: Start isIncluded. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 20 states. [2022-04-08 03:34:59,674 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 20 states. [2022-04-08 03:34:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:34:59,677 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-04-08 03:34:59,677 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-08 03:34:59,678 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 03:34:59,678 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 03:34:59,678 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 03:34:59,678 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 03:34:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 03:34:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-04-08 03:34:59,681 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-04-08 03:34:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 03:34:59,682 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-04-08 03:34:59,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:34:59,682 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 20 states and 22 transitions. [2022-04-08 03:34:59,732 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 22 edges. 22 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:34:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-08 03:34:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-08 03:34:59,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 03:34:59,736 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 03:34:59,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-08 03:34:59,736 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 03:34:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 03:34:59,737 INFO L85 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2022-04-08 03:34:59,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 03:34:59,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019304495] [2022-04-08 03:34:59,738 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 03:34:59,738 INFO L85 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 2 times [2022-04-08 03:34:59,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 03:34:59,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614612875] [2022-04-08 03:34:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 03:34:59,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 03:34:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:34:59,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 03:34:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:34:59,875 INFO L290 TraceCheckUtils]: 0: Hoare triple {203#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {197#true} is VALID [2022-04-08 03:34:59,875 INFO L290 TraceCheckUtils]: 1: Hoare triple {197#true} assume true; {197#true} is VALID [2022-04-08 03:34:59,875 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {197#true} {197#true} #60#return; {197#true} is VALID [2022-04-08 03:34:59,876 INFO L272 TraceCheckUtils]: 0: Hoare triple {197#true} call ULTIMATE.init(); {203#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 03:34:59,876 INFO L290 TraceCheckUtils]: 1: Hoare triple {203#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {197#true} is VALID [2022-04-08 03:34:59,877 INFO L290 TraceCheckUtils]: 2: Hoare triple {197#true} assume true; {197#true} is VALID [2022-04-08 03:34:59,877 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {197#true} {197#true} #60#return; {197#true} is VALID [2022-04-08 03:34:59,877 INFO L272 TraceCheckUtils]: 4: Hoare triple {197#true} call #t~ret7 := main(); {197#true} is VALID [2022-04-08 03:34:59,877 INFO L290 TraceCheckUtils]: 5: Hoare triple {197#true} ~i~0 := 0;~x~0 := 0;~y~0 := 0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~n~0 := #t~nondet4;havoc #t~nondet4; {197#true} is VALID [2022-04-08 03:34:59,879 INFO L290 TraceCheckUtils]: 6: Hoare triple {197#true} assume !!(~n~0 > 0);~i~0 := 0; {202#(and (<= 1 main_~n~0) (= main_~i~0 0))} is VALID [2022-04-08 03:34:59,881 INFO L290 TraceCheckUtils]: 7: Hoare triple {202#(and (<= 1 main_~n~0) (= main_~i~0 0))} assume !(~i~0 < ~n~0); {198#false} is VALID [2022-04-08 03:34:59,881 INFO L272 TraceCheckUtils]: 8: Hoare triple {198#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {198#false} is VALID [2022-04-08 03:34:59,881 INFO L290 TraceCheckUtils]: 9: Hoare triple {198#false} ~cond := #in~cond; {198#false} is VALID [2022-04-08 03:34:59,881 INFO L290 TraceCheckUtils]: 10: Hoare triple {198#false} assume 0 == ~cond; {198#false} is VALID [2022-04-08 03:34:59,882 INFO L290 TraceCheckUtils]: 11: Hoare triple {198#false} assume !false; {198#false} is VALID [2022-04-08 03:34:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 03:34:59,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 03:34:59,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614612875] [2022-04-08 03:34:59,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614612875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 03:34:59,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 03:34:59,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-08 03:34:59,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 03:34:59,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019304495] [2022-04-08 03:34:59,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019304495] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 03:34:59,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 03:34:59,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-08 03:34:59,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581376740] [2022-04-08 03:34:59,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 03:34:59,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-08 03:34:59,885 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 03:34:59,886 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:34:59,901 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:34:59,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-08 03:34:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 03:34:59,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-08 03:34:59,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-08 03:34:59,905 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:00,145 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-04-08 03:35:00,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-08 03:35:00,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-08 03:35:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 03:35:00,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-04-08 03:35:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-04-08 03:35:00,149 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 37 transitions. [2022-04-08 03:35:00,190 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 37 edges. 37 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:35:00,195 INFO L225 Difference]: With dead ends: 33 [2022-04-08 03:35:00,195 INFO L226 Difference]: Without dead ends: 26 [2022-04-08 03:35:00,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-08 03:35:00,200 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 03:35:00,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 03:35:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-08 03:35:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-04-08 03:35:00,223 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 03:35:00,224 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 03:35:00,226 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 03:35:00,226 INFO L87 Difference]: Start difference. First operand 26 states. Second operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 03:35:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:00,233 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-08 03:35:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-08 03:35:00,235 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 03:35:00,235 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 03:35:00,236 INFO L74 IsIncluded]: Start isIncluded. First operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 26 states. [2022-04-08 03:35:00,236 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 26 states. [2022-04-08 03:35:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:00,241 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-08 03:35:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-08 03:35:00,242 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 03:35:00,242 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 03:35:00,242 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 03:35:00,242 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 03:35:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 03:35:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-04-08 03:35:00,249 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2022-04-08 03:35:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 03:35:00,250 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-04-08 03:35:00,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,250 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 21 states and 23 transitions. [2022-04-08 03:35:00,278 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:35:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-04-08 03:35:00,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-08 03:35:00,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 03:35:00,281 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 03:35:00,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-08 03:35:00,282 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 03:35:00,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 03:35:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2022-04-08 03:35:00,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 03:35:00,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1608644893] [2022-04-08 03:35:00,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 03:35:00,289 INFO L85 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 2 times [2022-04-08 03:35:00,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 03:35:00,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443792092] [2022-04-08 03:35:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 03:35:00,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 03:35:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:35:00,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 03:35:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:35:00,446 INFO L290 TraceCheckUtils]: 0: Hoare triple {377#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {368#true} is VALID [2022-04-08 03:35:00,447 INFO L290 TraceCheckUtils]: 1: Hoare triple {368#true} assume true; {368#true} is VALID [2022-04-08 03:35:00,447 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {368#true} {368#true} #60#return; {368#true} is VALID [2022-04-08 03:35:00,447 INFO L272 TraceCheckUtils]: 0: Hoare triple {368#true} call ULTIMATE.init(); {377#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 03:35:00,448 INFO L290 TraceCheckUtils]: 1: Hoare triple {377#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {368#true} is VALID [2022-04-08 03:35:00,449 INFO L290 TraceCheckUtils]: 2: Hoare triple {368#true} assume true; {368#true} is VALID [2022-04-08 03:35:00,449 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {368#true} {368#true} #60#return; {368#true} is VALID [2022-04-08 03:35:00,451 INFO L272 TraceCheckUtils]: 4: Hoare triple {368#true} call #t~ret7 := main(); {368#true} is VALID [2022-04-08 03:35:00,452 INFO L290 TraceCheckUtils]: 5: Hoare triple {368#true} ~i~0 := 0;~x~0 := 0;~y~0 := 0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~n~0 := #t~nondet4;havoc #t~nondet4; {373#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-08 03:35:00,455 INFO L290 TraceCheckUtils]: 6: Hoare triple {373#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(~n~0 > 0);~i~0 := 0; {373#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-08 03:35:00,457 INFO L290 TraceCheckUtils]: 7: Hoare triple {373#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(~i~0 < ~n~0);~x~0 := ~x~0 - ~y~0; {374#(and (<= main_~x~0 0) (< 0 (+ main_~x~0 1)))} is VALID [2022-04-08 03:35:00,458 INFO L272 TraceCheckUtils]: 8: Hoare triple {374#(and (<= main_~x~0 0) (< 0 (+ main_~x~0 1)))} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {375#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 03:35:00,459 INFO L290 TraceCheckUtils]: 9: Hoare triple {375#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {376#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 03:35:00,460 INFO L290 TraceCheckUtils]: 10: Hoare triple {376#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {369#false} is VALID [2022-04-08 03:35:00,460 INFO L290 TraceCheckUtils]: 11: Hoare triple {369#false} assume !false; {369#false} is VALID [2022-04-08 03:35:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 03:35:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 03:35:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443792092] [2022-04-08 03:35:00,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443792092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 03:35:00,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 03:35:00,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-08 03:35:00,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 03:35:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1608644893] [2022-04-08 03:35:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1608644893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 03:35:00,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 03:35:00,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-08 03:35:00,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820067363] [2022-04-08 03:35:00,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 03:35:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-08 03:35:00,464 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 03:35:00,464 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,475 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:35:00,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-08 03:35:00,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 03:35:00,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-08 03:35:00,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-08 03:35:00,477 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:00,768 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-04-08 03:35:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-08 03:35:00,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-08 03:35:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 03:35:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 32 transitions. [2022-04-08 03:35:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 32 transitions. [2022-04-08 03:35:00,780 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 32 transitions. [2022-04-08 03:35:00,813 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 32 edges. 32 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:35:00,816 INFO L225 Difference]: With dead ends: 30 [2022-04-08 03:35:00,816 INFO L226 Difference]: Without dead ends: 28 [2022-04-08 03:35:00,817 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-08 03:35:00,819 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 03:35:00,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 38 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 03:35:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-08 03:35:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-04-08 03:35:00,843 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 03:35:00,844 INFO L82 GeneralOperation]: Start isEquivalent. First operand 28 states. Second operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 03:35:00,845 INFO L74 IsIncluded]: Start isIncluded. First operand 28 states. Second operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 03:35:00,845 INFO L87 Difference]: Start difference. First operand 28 states. Second operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 03:35:00,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:00,848 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-08 03:35:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-08 03:35:00,851 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 03:35:00,852 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 03:35:00,852 INFO L74 IsIncluded]: Start isIncluded. First operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand 28 states. [2022-04-08 03:35:00,852 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand 28 states. [2022-04-08 03:35:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:00,854 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-08 03:35:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-08 03:35:00,854 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 03:35:00,855 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 03:35:00,855 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 03:35:00,855 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 03:35:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 03:35:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-04-08 03:35:00,857 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2022-04-08 03:35:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 03:35:00,857 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-04-08 03:35:00,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-08 03:35:00,857 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 26 states and 28 transitions. [2022-04-08 03:35:00,899 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:35:00,900 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-04-08 03:35:00,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-08 03:35:00,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 03:35:00,902 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 03:35:00,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-08 03:35:00,904 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 03:35:00,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 03:35:00,904 INFO L85 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2022-04-08 03:35:00,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 03:35:00,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012885442] [2022-04-08 03:35:00,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 03:35:00,908 INFO L85 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 2 times [2022-04-08 03:35:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 03:35:00,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817556529] [2022-04-08 03:35:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 03:35:00,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 03:35:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:35:01,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 03:35:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:35:01,082 INFO L290 TraceCheckUtils]: 0: Hoare triple {572#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {558#true} is VALID [2022-04-08 03:35:01,082 INFO L290 TraceCheckUtils]: 1: Hoare triple {558#true} assume true; {558#true} is VALID [2022-04-08 03:35:01,083 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {558#true} {558#true} #60#return; {558#true} is VALID [2022-04-08 03:35:01,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-08 03:35:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 03:35:01,089 INFO L290 TraceCheckUtils]: 0: Hoare triple {558#true} ~cond := #in~cond; {558#true} is VALID [2022-04-08 03:35:01,089 INFO L290 TraceCheckUtils]: 1: Hoare triple {558#true} assume !(0 == ~cond); {558#true} is VALID [2022-04-08 03:35:01,089 INFO L290 TraceCheckUtils]: 2: Hoare triple {558#true} assume true; {558#true} is VALID [2022-04-08 03:35:01,093 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {558#true} {564#(= main_~x~0 0)} #54#return; {564#(= main_~x~0 0)} is VALID [2022-04-08 03:35:01,094 INFO L272 TraceCheckUtils]: 0: Hoare triple {558#true} call ULTIMATE.init(); {572#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 03:35:01,094 INFO L290 TraceCheckUtils]: 1: Hoare triple {572#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); {558#true} is VALID [2022-04-08 03:35:01,094 INFO L290 TraceCheckUtils]: 2: Hoare triple {558#true} assume true; {558#true} is VALID [2022-04-08 03:35:01,095 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {558#true} {558#true} #60#return; {558#true} is VALID [2022-04-08 03:35:01,095 INFO L272 TraceCheckUtils]: 4: Hoare triple {558#true} call #t~ret7 := main(); {558#true} is VALID [2022-04-08 03:35:01,095 INFO L290 TraceCheckUtils]: 5: Hoare triple {558#true} ~i~0 := 0;~x~0 := 0;~y~0 := 0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~n~0 := #t~nondet4;havoc #t~nondet4; {563#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-08 03:35:01,096 INFO L290 TraceCheckUtils]: 6: Hoare triple {563#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(~n~0 > 0);~i~0 := 0; {563#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-08 03:35:01,096 INFO L290 TraceCheckUtils]: 7: Hoare triple {563#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(~i~0 < ~n~0);~x~0 := ~x~0 - ~y~0; {564#(= main_~x~0 0)} is VALID [2022-04-08 03:35:01,097 INFO L272 TraceCheckUtils]: 8: Hoare triple {564#(= main_~x~0 0)} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {558#true} is VALID [2022-04-08 03:35:01,097 INFO L290 TraceCheckUtils]: 9: Hoare triple {558#true} ~cond := #in~cond; {558#true} is VALID [2022-04-08 03:35:01,097 INFO L290 TraceCheckUtils]: 10: Hoare triple {558#true} assume !(0 == ~cond); {558#true} is VALID [2022-04-08 03:35:01,097 INFO L290 TraceCheckUtils]: 11: Hoare triple {558#true} assume true; {558#true} is VALID [2022-04-08 03:35:01,098 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {558#true} {564#(= main_~x~0 0)} #54#return; {564#(= main_~x~0 0)} is VALID [2022-04-08 03:35:01,098 INFO L290 TraceCheckUtils]: 13: Hoare triple {564#(= main_~x~0 0)} assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~y~0 := #t~nondet6;havoc #t~nondet6; {564#(= main_~x~0 0)} is VALID [2022-04-08 03:35:01,099 INFO L290 TraceCheckUtils]: 14: Hoare triple {564#(= main_~x~0 0)} assume !!(0 != ~y~0);~x~0 := ~x~0 + ~y~0; {569#(or (<= 1 main_~x~0) (<= (+ main_~x~0 1) 0))} is VALID [2022-04-08 03:35:01,100 INFO L272 TraceCheckUtils]: 15: Hoare triple {569#(or (<= 1 main_~x~0) (<= (+ main_~x~0 1) 0))} call __VERIFIER_assert((if 0 != ~x~0 then 1 else 0)); {570#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 03:35:01,100 INFO L290 TraceCheckUtils]: 16: Hoare triple {570#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {571#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 03:35:01,101 INFO L290 TraceCheckUtils]: 17: Hoare triple {571#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {559#false} is VALID [2022-04-08 03:35:01,102 INFO L290 TraceCheckUtils]: 18: Hoare triple {559#false} assume !false; {559#false} is VALID [2022-04-08 03:35:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 03:35:01,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 03:35:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817556529] [2022-04-08 03:35:01,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817556529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 03:35:01,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 03:35:01,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-08 03:35:01,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 03:35:01,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012885442] [2022-04-08 03:35:01,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012885442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 03:35:01,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 03:35:01,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-08 03:35:01,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449230692] [2022-04-08 03:35:01,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 03:35:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-04-08 03:35:01,104 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 03:35:01,104 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 03:35:01,120 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:35:01,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-08 03:35:01,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 03:35:01,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-08 03:35:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-08 03:35:01,122 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 03:35:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:01,497 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-08 03:35:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-08 03:35:01,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-04-08 03:35:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 03:35:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 03:35:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 38 transitions. [2022-04-08 03:35:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 03:35:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 38 transitions. [2022-04-08 03:35:01,508 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 9 states and 38 transitions. [2022-04-08 03:35:01,549 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:35:01,553 INFO L225 Difference]: With dead ends: 38 [2022-04-08 03:35:01,553 INFO L226 Difference]: Without dead ends: 36 [2022-04-08 03:35:01,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-08 03:35:01,555 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 03:35:01,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 43 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 03:35:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-08 03:35:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-04-08 03:35:01,584 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 03:35:01,584 INFO L82 GeneralOperation]: Start isEquivalent. First operand 36 states. Second operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 03:35:01,584 INFO L74 IsIncluded]: Start isIncluded. First operand 36 states. Second operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 03:35:01,585 INFO L87 Difference]: Start difference. First operand 36 states. Second operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 03:35:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:01,587 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-08 03:35:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-08 03:35:01,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 03:35:01,588 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 03:35:01,588 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 36 states. [2022-04-08 03:35:01,589 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 36 states. [2022-04-08 03:35:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 03:35:01,594 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-08 03:35:01,594 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-08 03:35:01,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 03:35:01,596 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 03:35:01,596 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 03:35:01,596 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 03:35:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 03:35:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-08 03:35:01,599 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2022-04-08 03:35:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 03:35:01,599 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-08 03:35:01,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 03:35:01,599 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 35 transitions. [2022-04-08 03:35:01,661 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 03:35:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-08 03:35:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-08 03:35:01,663 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 03:35:01,663 INFO L499 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] [2022-04-08 03:35:01,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-08 03:35:01,663 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 03:35:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 03:35:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2022-04-08 03:35:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 03:35:01,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1456689241] [2022-04-08 03:35:06,237 WARN L977 rdanLoopAcceleration]: Unable to prove correctness of quantifier elimination. [2022-04-08 03:35:06,250 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Computed reflexive-transitive closure does not contain relation itself.Something went wrong in computation of loop acceleration formula. at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.checkPropertiesOfLoopAccelerationFormula(JordanLoopAcceleration.java:1038) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.createLoopAccelerationTermSequential(JordanLoopAcceleration.java:693) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.createLoopAccelerationFormula(JordanLoopAcceleration.java:528) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.accelerateLoop(JordanLoopAcceleration.java:156) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorJordan.accelerateLoop(AcceleratorJordan.java:88) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:246) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:412) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-04-08 03:35:06,254 INFO L158 Benchmark]: Toolchain (without parser) took 8181.62ms. Allocated memory was 202.4MB in the beginning and 334.5MB in the end (delta: 132.1MB). Free memory was 151.0MB in the beginning and 267.2MB in the end (delta: -116.2MB). Peak memory consumption was 16.9MB. Max. memory is 8.0GB. [2022-04-08 03:35:06,254 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 202.4MB. Free memory is still 167.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-08 03:35:06,254 INFO L158 Benchmark]: CACSL2BoogieTranslator took 329.51ms. Allocated memory was 202.4MB in the beginning and 334.5MB in the end (delta: 132.1MB). Free memory was 150.8MB in the beginning and 310.4MB in the end (delta: -159.6MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2022-04-08 03:35:06,255 INFO L158 Benchmark]: Boogie Preprocessor took 50.75ms. Allocated memory is still 334.5MB. Free memory was 310.4MB in the beginning and 309.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-08 03:35:06,255 INFO L158 Benchmark]: RCFGBuilder took 361.47ms. Allocated memory is still 334.5MB. Free memory was 308.7MB in the beginning and 297.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-08 03:35:06,255 INFO L158 Benchmark]: TraceAbstraction took 7432.16ms. Allocated memory is still 334.5MB. Free memory was 297.2MB in the beginning and 267.2MB in the end (delta: 30.0MB). Peak memory consumption was 30.3MB. Max. memory is 8.0GB. [2022-04-08 03:35:06,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 202.4MB. Free memory is still 167.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 329.51ms. Allocated memory was 202.4MB in the beginning and 334.5MB in the end (delta: 132.1MB). Free memory was 150.8MB in the beginning and 310.4MB in the end (delta: -159.6MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 50.75ms. Allocated memory is still 334.5MB. Free memory was 310.4MB in the beginning and 309.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 361.47ms. Allocated memory is still 334.5MB. Free memory was 308.7MB in the beginning and 297.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 7432.16ms. Allocated memory is still 334.5MB. Free memory was 297.2MB in the beginning and 267.2MB in the end (delta: 30.0MB). Peak memory consumption was 30.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Computed reflexive-transitive closure does not contain relation itself.Something went wrong in computation of loop acceleration formula. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Computed reflexive-transitive closure does not contain relation itself.Something went wrong in computation of loop acceleration formula.: de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.checkPropertiesOfLoopAccelerationFormula(JordanLoopAcceleration.java:1038) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-04-08 03:35:06,280 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...