/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 12:01:34,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 12:01:34,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 12:01:34,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 12:01:34,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-15 12:01:34,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-15 12:01:34,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-15 12:01:34,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-15 12:01:34,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-15 12:01:34,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-15 12:01:34,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-15 12:01:34,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-15 12:01:34,437 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-15 12:01:34,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-15 12:01:34,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-15 12:01:34,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-15 12:01:34,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-15 12:01:34,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-15 12:01:34,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 12:01:34,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 12:01:34,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 12:01:34,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-15 12:01:34,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 12:01:34,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 12:01:34,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 12:01:34,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 12:01:34,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 12:01:34,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 12:01:34,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 12:01:34,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 12:01:34,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 12:01:34,475 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 12:01:34,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 12:01:34,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 12:01:34,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 12:01:34,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 12:01:34,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 12:01:34,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 12:01:34,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 12:01:34,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 12:01:34,476 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 12:01:34,477 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 12:01:34,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 12:01:34,477 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-15 12:01:34,477 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 12:01:34,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 12:01:34,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 12:01:34,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 12:01:34,726 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 12:01:34,727 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 12:01:34,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2022-04-15 12:01:34,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7cbe49e/c42418e8554e4db9b1a0135bf680281a/FLAG95a31e02e [2022-04-15 12:01:35,157 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 12:01:35,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2022-04-15 12:01:35,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7cbe49e/c42418e8554e4db9b1a0135bf680281a/FLAG95a31e02e [2022-04-15 12:01:35,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7cbe49e/c42418e8554e4db9b1a0135bf680281a [2022-04-15 12:01:35,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 12:01:35,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 12:01:35,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 12:01:35,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 12:01:35,188 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 12:01:35,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54158a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35, skipping insertion in model container [2022-04-15 12:01:35,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 12:01:35,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 12:01:35,384 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] [2022-04-15 12:01:35,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 12:01:35,417 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 12:01:35,426 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] [2022-04-15 12:01:35,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 12:01:35,444 INFO L208 MainTranslator]: Completed translation [2022-04-15 12:01:35,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35 WrapperNode [2022-04-15 12:01:35,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 12:01:35,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 12:01:35,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 12:01:35,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 12:01:35,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 12:01:35,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 12:01:35,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 12:01:35,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 12:01:35,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (1/1) ... [2022-04-15 12:01:35,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 12:01:35,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 12:01:35,499 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) [2022-04-15 12:01:35,531 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 [2022-04-15 12:01:35,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 12:01:35,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 12:01:35,549 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 12:01:35,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 12:01:35,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 12:01:35,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 12:01:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 12:01:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 12:01:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 12:01:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 12:01:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 12:01:35,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 12:01:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-15 12:01:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 12:01:35,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 12:01:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 12:01:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 12:01:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 12:01:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 12:01:35,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 12:01:35,598 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 12:01:35,599 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 12:01:35,764 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 12:01:35,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 12:01:35,768 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-15 12:01:35,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 12:01:35 BoogieIcfgContainer [2022-04-15 12:01:35,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 12:01:35,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 12:01:35,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 12:01:35,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 12:01:35,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 12:01:35" (1/3) ... [2022-04-15 12:01:35,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc42a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 12:01:35, skipping insertion in model container [2022-04-15 12:01:35,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 12:01:35" (2/3) ... [2022-04-15 12:01:35,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc42a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 12:01:35, skipping insertion in model container [2022-04-15 12:01:35,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 12:01:35" (3/3) ... [2022-04-15 12:01:35,780 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2022-04-15 12:01:35,798 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 12:01:35,798 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 12:01:35,831 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 12:01:35,839 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 [2022-04-15 12:01:35,839 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 12:01:35,855 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) [2022-04-15 12:01:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-15 12:01:35,860 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 12:01:35,860 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 12:01:35,861 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 12:01:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 12:01:35,868 INFO L85 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 1 times [2022-04-15 12:01:35,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:35,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [16789548] [2022-04-15 12:01:35,882 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 12:01:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash 669529748, now seen corresponding path program 2 times [2022-04-15 12:01:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 12:01:35,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083695654] [2022-04-15 12:01:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 12:01:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 12:01:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:36,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 12:01:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:36,072 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 [2022-04-15 12:01:36,073 INFO L290 TraceCheckUtils]: 1: Hoare triple {27#true} assume true; {27#true} is VALID [2022-04-15 12:01:36,073 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {27#true} {27#true} #60#return; {27#true} is VALID [2022-04-15 12:01:36,076 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 [2022-04-15 12:01:36,076 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 [2022-04-15 12:01:36,076 INFO L290 TraceCheckUtils]: 2: Hoare triple {27#true} assume true; {27#true} is VALID [2022-04-15 12:01:36,076 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {27#true} {27#true} #60#return; {27#true} is VALID [2022-04-15 12:01:36,077 INFO L272 TraceCheckUtils]: 4: Hoare triple {27#true} call #t~ret7 := main(); {27#true} is VALID [2022-04-15 12:01:36,077 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 [2022-04-15 12:01:36,077 INFO L290 TraceCheckUtils]: 6: Hoare triple {27#true} assume !!(~n~0 > 0);~i~0 := 0; {27#true} is VALID [2022-04-15 12:01:36,078 INFO L290 TraceCheckUtils]: 7: Hoare triple {27#true} assume !true; {28#false} is VALID [2022-04-15 12:01:36,078 INFO L272 TraceCheckUtils]: 8: Hoare triple {28#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {28#false} is VALID [2022-04-15 12:01:36,078 INFO L290 TraceCheckUtils]: 9: Hoare triple {28#false} ~cond := #in~cond; {28#false} is VALID [2022-04-15 12:01:36,079 INFO L290 TraceCheckUtils]: 10: Hoare triple {28#false} assume 0 == ~cond; {28#false} is VALID [2022-04-15 12:01:36,079 INFO L290 TraceCheckUtils]: 11: Hoare triple {28#false} assume !false; {28#false} is VALID [2022-04-15 12:01:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 12:01:36,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 12:01:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083695654] [2022-04-15 12:01:36,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083695654] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 12:01:36,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 12:01:36,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 12:01:36,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 12:01:36,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [16789548] [2022-04-15 12:01:36,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [16789548] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 12:01:36,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 12:01:36,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 12:01:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356058129] [2022-04-15 12:01:36,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 12:01:36,091 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 [2022-04-15 12:01:36,092 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 12:01:36,095 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) [2022-04-15 12:01:36,119 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:36,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-15 12:01:36,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-15 12:01:36,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 12:01:36,141 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) [2022-04-15 12:01:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:36,245 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-04-15 12:01:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-15 12:01:36,245 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 [2022-04-15 12:01:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 12:01:36,246 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) [2022-04-15 12:01:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-04-15 12:01:36,255 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) [2022-04-15 12:01:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-04-15 12:01:36,261 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 55 transitions. [2022-04-15 12:01:36,331 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:36,339 INFO L225 Difference]: With dead ends: 41 [2022-04-15 12:01:36,339 INFO L226 Difference]: Without dead ends: 20 [2022-04-15 12:01:36,342 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 [2022-04-15 12:01:36,345 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 [2022-04-15 12:01:36,347 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] [2022-04-15 12:01:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-15 12:01:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-15 12:01:36,370 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 12:01:36,371 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) [2022-04-15 12:01:36,371 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) [2022-04-15 12:01:36,372 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) [2022-04-15 12:01:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:36,379 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-04-15 12:01:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-15 12:01:36,380 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 12:01:36,382 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 12:01:36,383 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. [2022-04-15 12:01:36,383 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. [2022-04-15 12:01:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:36,388 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-04-15 12:01:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-15 12:01:36,389 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 12:01:36,389 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 12:01:36,389 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 12:01:36,389 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 12:01:36,390 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) [2022-04-15 12:01:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-04-15 12:01:36,392 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-04-15 12:01:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 12:01:36,392 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-04-15 12:01:36,392 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) [2022-04-15 12:01:36,393 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 20 states and 22 transitions. [2022-04-15 12:01:36,427 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 22 edges. 22 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-04-15 12:01:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-15 12:01:36,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 12:01:36,429 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 12:01:36,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-15 12:01:36,430 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 12:01:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 12:01:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 1 times [2022-04-15 12:01:36,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:36,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2022016967] [2022-04-15 12:01:36,431 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 12:01:36,431 INFO L85 PathProgramCache]: Analyzing trace with hash 657523975, now seen corresponding path program 2 times [2022-04-15 12:01:36,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 12:01:36,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419044351] [2022-04-15 12:01:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 12:01:36,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 12:01:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:36,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 12:01:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:36,513 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 [2022-04-15 12:01:36,514 INFO L290 TraceCheckUtils]: 1: Hoare triple {197#true} assume true; {197#true} is VALID [2022-04-15 12:01:36,514 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {197#true} {197#true} #60#return; {197#true} is VALID [2022-04-15 12:01:36,515 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 [2022-04-15 12:01:36,515 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 [2022-04-15 12:01:36,515 INFO L290 TraceCheckUtils]: 2: Hoare triple {197#true} assume true; {197#true} is VALID [2022-04-15 12:01:36,515 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {197#true} {197#true} #60#return; {197#true} is VALID [2022-04-15 12:01:36,515 INFO L272 TraceCheckUtils]: 4: Hoare triple {197#true} call #t~ret7 := main(); {197#true} is VALID [2022-04-15 12:01:36,515 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 [2022-04-15 12:01:36,516 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 [2022-04-15 12:01:36,517 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 [2022-04-15 12:01:36,517 INFO L272 TraceCheckUtils]: 8: Hoare triple {198#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {198#false} is VALID [2022-04-15 12:01:36,517 INFO L290 TraceCheckUtils]: 9: Hoare triple {198#false} ~cond := #in~cond; {198#false} is VALID [2022-04-15 12:01:36,517 INFO L290 TraceCheckUtils]: 10: Hoare triple {198#false} assume 0 == ~cond; {198#false} is VALID [2022-04-15 12:01:36,517 INFO L290 TraceCheckUtils]: 11: Hoare triple {198#false} assume !false; {198#false} is VALID [2022-04-15 12:01:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 12:01:36,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 12:01:36,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419044351] [2022-04-15 12:01:36,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419044351] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 12:01:36,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 12:01:36,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 12:01:36,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 12:01:36,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2022016967] [2022-04-15 12:01:36,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2022016967] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 12:01:36,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 12:01:36,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 12:01:36,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624012612] [2022-04-15 12:01:36,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 12:01:36,521 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 [2022-04-15 12:01:36,522 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 12:01:36,522 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) [2022-04-15 12:01:36,532 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:36,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-15 12:01:36,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-15 12:01:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 12:01:36,533 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) [2022-04-15 12:01:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:36,664 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-04-15 12:01:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-15 12:01:36,664 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 [2022-04-15 12:01:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 12:01:36,665 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) [2022-04-15 12:01:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-04-15 12:01:36,672 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) [2022-04-15 12:01:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-04-15 12:01:36,675 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 37 transitions. [2022-04-15 12:01:36,735 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 37 edges. 37 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:36,738 INFO L225 Difference]: With dead ends: 33 [2022-04-15 12:01:36,739 INFO L226 Difference]: Without dead ends: 26 [2022-04-15 12:01:36,739 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 [2022-04-15 12:01:36,742 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 12:01:36,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 12:01:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-15 12:01:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-04-15 12:01:36,759 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 12:01:36,760 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) [2022-04-15 12:01:36,762 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) [2022-04-15 12:01:36,762 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) [2022-04-15 12:01:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:36,766 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-15 12:01:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-15 12:01:36,767 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 12:01:36,767 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 12:01:36,767 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. [2022-04-15 12:01:36,767 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. [2022-04-15 12:01:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:36,769 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-15 12:01:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-15 12:01:36,769 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 12:01:36,770 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 12:01:36,770 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 12:01:36,770 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 12:01:36,770 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) [2022-04-15 12:01:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-04-15 12:01:36,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2022-04-15 12:01:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 12:01:36,772 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-04-15 12:01:36,772 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) [2022-04-15 12:01:36,772 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 21 states and 23 transitions. [2022-04-15 12:01:36,797 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-04-15 12:01:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-15 12:01:36,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 12:01:36,799 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 12:01:36,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-15 12:01:36,800 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 12:01:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 12:01:36,800 INFO L85 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 1 times [2022-04-15 12:01:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:36,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696452535] [2022-04-15 12:01:36,805 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 12:01:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 659251853, now seen corresponding path program 2 times [2022-04-15 12:01:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 12:01:36,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292834996] [2022-04-15 12:01:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 12:01:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 12:01:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:36,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 12:01:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:36,945 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 [2022-04-15 12:01:36,945 INFO L290 TraceCheckUtils]: 1: Hoare triple {368#true} assume true; {368#true} is VALID [2022-04-15 12:01:36,946 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {368#true} {368#true} #60#return; {368#true} is VALID [2022-04-15 12:01:36,947 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 [2022-04-15 12:01:36,947 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 [2022-04-15 12:01:36,947 INFO L290 TraceCheckUtils]: 2: Hoare triple {368#true} assume true; {368#true} is VALID [2022-04-15 12:01:36,948 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {368#true} {368#true} #60#return; {368#true} is VALID [2022-04-15 12:01:36,948 INFO L272 TraceCheckUtils]: 4: Hoare triple {368#true} call #t~ret7 := main(); {368#true} is VALID [2022-04-15 12:01:36,949 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 [2022-04-15 12:01:36,951 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 [2022-04-15 12:01:36,954 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 [2022-04-15 12:01:36,956 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 [2022-04-15 12:01:36,962 INFO L290 TraceCheckUtils]: 9: Hoare triple {375#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {376#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-15 12:01:36,962 INFO L290 TraceCheckUtils]: 10: Hoare triple {376#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {369#false} is VALID [2022-04-15 12:01:36,963 INFO L290 TraceCheckUtils]: 11: Hoare triple {369#false} assume !false; {369#false} is VALID [2022-04-15 12:01:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 12:01:36,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 12:01:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292834996] [2022-04-15 12:01:36,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292834996] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 12:01:36,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 12:01:36,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-15 12:01:36,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 12:01:36,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696452535] [2022-04-15 12:01:36,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696452535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 12:01:36,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 12:01:36,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-15 12:01:36,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212850415] [2022-04-15 12:01:36,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 12:01:36,966 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 [2022-04-15 12:01:36,966 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 12:01:36,966 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) [2022-04-15 12:01:36,975 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:36,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-15 12:01:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-15 12:01:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-15 12:01:36,977 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) [2022-04-15 12:01:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:37,243 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-04-15 12:01:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-15 12:01:37,244 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 [2022-04-15 12:01:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 12:01:37,244 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) [2022-04-15 12:01:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 32 transitions. [2022-04-15 12:01:37,246 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) [2022-04-15 12:01:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 32 transitions. [2022-04-15 12:01:37,247 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 32 transitions. [2022-04-15 12:01:37,270 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 32 edges. 32 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:37,271 INFO L225 Difference]: With dead ends: 30 [2022-04-15 12:01:37,272 INFO L226 Difference]: Without dead ends: 28 [2022-04-15 12:01:37,272 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 [2022-04-15 12:01:37,273 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 [2022-04-15 12:01:37,273 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] [2022-04-15 12:01:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-15 12:01:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-04-15 12:01:37,284 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 12:01:37,284 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) [2022-04-15 12:01:37,285 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) [2022-04-15 12:01:37,285 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) [2022-04-15 12:01:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:37,286 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-15 12:01:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-15 12:01:37,287 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 12:01:37,287 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 12:01:37,287 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. [2022-04-15 12:01:37,287 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. [2022-04-15 12:01:37,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:37,289 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-15 12:01:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-15 12:01:37,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 12:01:37,289 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 12:01:37,289 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 12:01:37,289 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 12:01:37,290 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) [2022-04-15 12:01:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-04-15 12:01:37,291 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2022-04-15 12:01:37,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 12:01:37,291 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-04-15 12:01:37,291 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) [2022-04-15 12:01:37,292 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 26 states and 28 transitions. [2022-04-15 12:01:37,323 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-04-15 12:01:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-15 12:01:37,324 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 12:01:37,324 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 12:01:37,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-15 12:01:37,324 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 12:01:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 12:01:37,325 INFO L85 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 1 times [2022-04-15 12:01:37,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:37,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718233138] [2022-04-15 12:01:37,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 12:01:37,325 INFO L85 PathProgramCache]: Analyzing trace with hash -932371294, now seen corresponding path program 2 times [2022-04-15 12:01:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 12:01:37,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509170711] [2022-04-15 12:01:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 12:01:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 12:01:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:37,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 12:01:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:37,456 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 [2022-04-15 12:01:37,457 INFO L290 TraceCheckUtils]: 1: Hoare triple {558#true} assume true; {558#true} is VALID [2022-04-15 12:01:37,457 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {558#true} {558#true} #60#return; {558#true} is VALID [2022-04-15 12:01:37,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-15 12:01:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 12:01:37,462 INFO L290 TraceCheckUtils]: 0: Hoare triple {558#true} ~cond := #in~cond; {558#true} is VALID [2022-04-15 12:01:37,462 INFO L290 TraceCheckUtils]: 1: Hoare triple {558#true} assume !(0 == ~cond); {558#true} is VALID [2022-04-15 12:01:37,462 INFO L290 TraceCheckUtils]: 2: Hoare triple {558#true} assume true; {558#true} is VALID [2022-04-15 12:01:37,463 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {558#true} {564#(= main_~x~0 0)} #54#return; {564#(= main_~x~0 0)} is VALID [2022-04-15 12:01:37,464 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 [2022-04-15 12:01:37,464 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 [2022-04-15 12:01:37,464 INFO L290 TraceCheckUtils]: 2: Hoare triple {558#true} assume true; {558#true} is VALID [2022-04-15 12:01:37,464 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {558#true} {558#true} #60#return; {558#true} is VALID [2022-04-15 12:01:37,464 INFO L272 TraceCheckUtils]: 4: Hoare triple {558#true} call #t~ret7 := main(); {558#true} is VALID [2022-04-15 12:01:37,465 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 [2022-04-15 12:01:37,465 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 [2022-04-15 12:01:37,465 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 [2022-04-15 12:01:37,466 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 [2022-04-15 12:01:37,466 INFO L290 TraceCheckUtils]: 9: Hoare triple {558#true} ~cond := #in~cond; {558#true} is VALID [2022-04-15 12:01:37,466 INFO L290 TraceCheckUtils]: 10: Hoare triple {558#true} assume !(0 == ~cond); {558#true} is VALID [2022-04-15 12:01:37,466 INFO L290 TraceCheckUtils]: 11: Hoare triple {558#true} assume true; {558#true} is VALID [2022-04-15 12:01:37,466 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {558#true} {564#(= main_~x~0 0)} #54#return; {564#(= main_~x~0 0)} is VALID [2022-04-15 12:01:37,467 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 [2022-04-15 12:01:37,467 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 [2022-04-15 12:01:37,468 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 [2022-04-15 12:01:37,468 INFO L290 TraceCheckUtils]: 16: Hoare triple {570#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {571#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-15 12:01:37,469 INFO L290 TraceCheckUtils]: 17: Hoare triple {571#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {559#false} is VALID [2022-04-15 12:01:37,469 INFO L290 TraceCheckUtils]: 18: Hoare triple {559#false} assume !false; {559#false} is VALID [2022-04-15 12:01:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 12:01:37,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 12:01:37,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509170711] [2022-04-15 12:01:37,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509170711] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 12:01:37,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 12:01:37,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-15 12:01:37,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 12:01:37,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718233138] [2022-04-15 12:01:37,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718233138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 12:01:37,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 12:01:37,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-15 12:01:37,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814366869] [2022-04-15 12:01:37,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 12:01:37,471 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 [2022-04-15 12:01:37,471 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 12:01:37,471 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) [2022-04-15 12:01:37,482 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:37,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-15 12:01:37,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-15 12:01:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-15 12:01:37,483 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) [2022-04-15 12:01:37,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:37,782 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-15 12:01:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-15 12:01:37,783 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 [2022-04-15 12:01:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 12:01:37,783 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) [2022-04-15 12:01:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 38 transitions. [2022-04-15 12:01:37,785 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) [2022-04-15 12:01:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 38 transitions. [2022-04-15 12:01:37,786 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 9 states and 38 transitions. [2022-04-15 12:01:37,819 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:37,820 INFO L225 Difference]: With dead ends: 38 [2022-04-15 12:01:37,820 INFO L226 Difference]: Without dead ends: 36 [2022-04-15 12:01:37,820 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 [2022-04-15 12:01:37,821 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 [2022-04-15 12:01:37,821 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] [2022-04-15 12:01:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-15 12:01:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-04-15 12:01:37,838 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 12:01:37,838 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) [2022-04-15 12:01:37,839 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) [2022-04-15 12:01:37,839 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) [2022-04-15 12:01:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:37,840 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-15 12:01:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-15 12:01:37,841 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 12:01:37,841 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 12:01:37,841 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. [2022-04-15 12:01:37,841 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. [2022-04-15 12:01:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 12:01:37,842 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-15 12:01:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-15 12:01:37,843 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 12:01:37,843 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 12:01:37,843 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 12:01:37,843 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 12:01:37,843 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) [2022-04-15 12:01:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-15 12:01:37,844 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2022-04-15 12:01:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 12:01:37,844 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-15 12:01:37,844 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) [2022-04-15 12:01:37,845 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 35 transitions. [2022-04-15 12:01:37,871 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 12:01:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-15 12:01:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-15 12:01:37,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 12:01:37,872 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] [2022-04-15 12:01:37,872 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-15 12:01:37,872 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 12:01:37,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 12:01:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1861509246, now seen corresponding path program 1 times [2022-04-15 12:01:37,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 12:01:37,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [886998349] [2022-04-15 12:03:11,757 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.logic.Theory.term(Theory.java:1603) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:401) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:249) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.PredicateHelper.makeReflexive(PredicateHelper.java:222) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:253) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:195) 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:411) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:301) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:261) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:153) 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) [2022-04-15 12:03:11,760 INFO L158 Benchmark]: Toolchain (without parser) took 96578.38ms. Allocated memory was 187.7MB in the beginning and 250.6MB in the end (delta: 62.9MB). Free memory was 137.5MB in the beginning and 163.9MB in the end (delta: -26.4MB). Peak memory consumption was 116.0MB. Max. memory is 8.0GB. [2022-04-15 12:03:11,761 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 187.7MB. Free memory was 154.2MB in the beginning and 154.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-15 12:03:11,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.39ms. Allocated memory is still 187.7MB. Free memory was 137.4MB in the beginning and 163.9MB in the end (delta: -26.5MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. [2022-04-15 12:03:11,761 INFO L158 Benchmark]: Boogie Preprocessor took 29.51ms. Allocated memory is still 187.7MB. Free memory was 163.9MB in the beginning and 162.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-15 12:03:11,761 INFO L158 Benchmark]: RCFGBuilder took 293.79ms. Allocated memory is still 187.7MB. Free memory was 162.4MB in the beginning and 151.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-15 12:03:11,761 INFO L158 Benchmark]: TraceAbstraction took 95988.94ms. Allocated memory was 187.7MB in the beginning and 250.6MB in the end (delta: 62.9MB). Free memory was 151.4MB in the beginning and 163.9MB in the end (delta: -12.6MB). Peak memory consumption was 128.9MB. Max. memory is 8.0GB. [2022-04-15 12:03:11,762 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 0.13ms. Allocated memory is still 187.7MB. Free memory was 154.2MB in the beginning and 154.0MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 260.39ms. Allocated memory is still 187.7MB. Free memory was 137.4MB in the beginning and 163.9MB in the end (delta: -26.5MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.51ms. Allocated memory is still 187.7MB. Free memory was 163.9MB in the beginning and 162.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 293.79ms. Allocated memory is still 187.7MB. Free memory was 162.4MB in the beginning and 151.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 95988.94ms. Allocated memory was 187.7MB in the beginning and 250.6MB in the end (delta: 62.9MB). Free memory was 151.4MB in the beginning and 163.9MB in the end (delta: -12.6MB). Peak memory consumption was 128.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.logic.Theory.term(Theory.java:1603) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-04-15 12:03:11,777 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...