/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:16:31,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:16:31,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:16:31,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:16:31,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 19:16:31,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 19:16:31,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 19:16:31,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 19:16:31,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 19:16:31,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 19:16:31,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 19:16:31,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 19:16:31,422 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 19:16:31,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 19:16:31,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 19:16:31,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 19:16:31,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 19:16:31,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 19:16:31,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:16:31,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:16:31,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:16:31,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:16:31,446 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:16:31,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:16:31,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:16:31,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:16:31,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:16:31,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:16:31,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:16:31,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:16:31,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:16:31,449 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:16:31,449 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:16:31,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:16:31,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:16:31,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:16:31,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:16:31,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:16:31,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:16:31,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:16:31,450 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:16:31,450 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:16:31,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:16:31,450 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:16:31,450 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:16:31,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:16:31,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:16:31,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:16:31,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:16:31,669 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:16:31,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-03-20 19:16:31,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4acbfaa8e/76663e60891d492e941be5ed3d60db77/FLAGe7abd8bc4 [2022-03-20 19:16:32,032 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:16:32,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c [2022-03-20 19:16:32,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4acbfaa8e/76663e60891d492e941be5ed3d60db77/FLAGe7abd8bc4 [2022-03-20 19:16:32,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4acbfaa8e/76663e60891d492e941be5ed3d60db77 [2022-03-20 19:16:32,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:16:32,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:16:32,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:16:32,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:16:32,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:16:32,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b00dfa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32, skipping insertion in model container [2022-03-20 19:16:32,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:16:32,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:16:32,625 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2022-03-20 19:16:32,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:16:32,653 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:16:32,661 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/prefixsum_iter.c[526,539] [2022-03-20 19:16:32,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:16:32,679 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:16:32,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32 WrapperNode [2022-03-20 19:16:32,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:16:32,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:16:32,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:16:32,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:16:32,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:16:32,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:16:32,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:16:32,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:16:32,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (1/1) ... [2022-03-20 19:16:32,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:16:32,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:32,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 19:16:32,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure is_pow2 [2022-03-20 19:16:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-03-20 19:16:32,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:16:32,790 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure free [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:16:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure is_pow2 [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:16:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:16:32,848 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:16:32,850 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:16:33,019 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:16:33,025 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:16:33,025 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-03-20 19:16:33,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:16:33 BoogieIcfgContainer [2022-03-20 19:16:33,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:16:33,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:16:33,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:16:33,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:16:33,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:16:32" (1/3) ... [2022-03-20 19:16:33,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52869a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:16:33, skipping insertion in model container [2022-03-20 19:16:33,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:16:32" (2/3) ... [2022-03-20 19:16:33,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52869a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:16:33, skipping insertion in model container [2022-03-20 19:16:33,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:16:33" (3/3) ... [2022-03-20 19:16:33,037 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-03-20 19:16:33,041 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:16:33,041 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:16:33,071 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:16:33,076 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 [2022-03-20 19:16:33,076 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:16:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 19:16:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 19:16:33,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:33,094 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:33,095 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:33,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:33,099 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 1 times [2022-03-20 19:16:33,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:33,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1129464943] [2022-03-20 19:16:33,112 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash 242194828, now seen corresponding path program 2 times [2022-03-20 19:16:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:33,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426040717] [2022-03-20 19:16:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:33,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 19:16:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 19:16:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 19:16:33,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:33,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426040717] [2022-03-20 19:16:33,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426040717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:33,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:33,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:16:33,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1129464943] [2022-03-20 19:16:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1129464943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:33,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:33,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:16:33,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589101756] [2022-03-20 19:16:33,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:33,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:16:33,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:16:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:16:33,352 INFO L87 Difference]: Start difference. First operand has 64 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 43 states have internal predecessors, (59), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:33,537 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-03-20 19:16:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:16:33,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-03-20 19:16:33,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:33,546 INFO L225 Difference]: With dead ends: 127 [2022-03-20 19:16:33,546 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 19:16:33,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:16:33,558 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 81 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:33,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 19:16:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-03-20 19:16:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 19:16:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-03-20 19:16:33,589 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 54 [2022-03-20 19:16:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:33,590 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-03-20 19:16:33,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-03-20 19:16:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 19:16:33,592 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:33,592 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:33,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:16:33,592 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:33,593 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 1 times [2022-03-20 19:16:33,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:33,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119869543] [2022-03-20 19:16:33,593 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:33,594 INFO L85 PathProgramCache]: Analyzing trace with hash -73515768, now seen corresponding path program 2 times [2022-03-20 19:16:33,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:33,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103496984] [2022-03-20 19:16:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:33,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-20 19:16:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-20 19:16:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 19:16:33,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:33,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103496984] [2022-03-20 19:16:33,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103496984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:33,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:33,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:16:33,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119869543] [2022-03-20 19:16:33,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119869543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:33,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:33,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:16:33,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925140729] [2022-03-20 19:16:33,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:33,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:16:33,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:33,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:16:33,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:16:33,782 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:34,037 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2022-03-20 19:16:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:16:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-03-20 19:16:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:34,041 INFO L225 Difference]: With dead ends: 81 [2022-03-20 19:16:34,041 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 19:16:34,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:16:34,042 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:34,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 55 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:16:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 19:16:34,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-03-20 19:16:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 19:16:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-20 19:16:34,069 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 54 [2022-03-20 19:16:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:34,069 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-20 19:16:34,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-20 19:16:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 19:16:34,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:34,073 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:34,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 19:16:34,073 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 1 times [2022-03-20 19:16:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [334589396] [2022-03-20 19:16:34,074 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash -628313814, now seen corresponding path program 2 times [2022-03-20 19:16:34,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:34,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219379693] [2022-03-20 19:16:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:34,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 19:16:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 19:16:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 19:16:34,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:34,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219379693] [2022-03-20 19:16:34,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219379693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:34,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062258377] [2022-03-20 19:16:34,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:16:34,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:34,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:34,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:16:34,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 19:16:34,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 19:16:34,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:16:34,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 19:16:34,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:16:34,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-20 19:16:34,936 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-03-20 19:16:34,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-03-20 19:16:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:16:34,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:16:34,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062258377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:34,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:16:34,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16] total 26 [2022-03-20 19:16:35,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:35,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [334589396] [2022-03-20 19:16:35,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [334589396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:35,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:35,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:16:35,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719690836] [2022-03-20 19:16:35,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:35,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:16:35,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:16:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:16:35,003 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:35,115 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-03-20 19:16:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:16:35,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-03-20 19:16:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:35,118 INFO L225 Difference]: With dead ends: 83 [2022-03-20 19:16:35,118 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 19:16:35,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-03-20 19:16:35,125 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:35,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 498 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-03-20 19:16:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 19:16:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2022-03-20 19:16:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-20 19:16:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-03-20 19:16:35,143 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 56 [2022-03-20 19:16:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:35,143 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-03-20 19:16:35,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-03-20 19:16:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 19:16:35,144 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:35,144 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:35,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 19:16:35,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:35,345 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:35,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash -35265218, now seen corresponding path program 1 times [2022-03-20 19:16:35,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:35,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546328710] [2022-03-20 19:16:35,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash -35265218, now seen corresponding path program 2 times [2022-03-20 19:16:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497314630] [2022-03-20 19:16:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:35,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 19:16:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 19:16:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 19:16:35,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497314630] [2022-03-20 19:16:35,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497314630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970010294] [2022-03-20 19:16:35,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:16:35,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:35,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:16:35,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 19:16:35,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 19:16:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:16:35,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 19:16:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:16:35,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-20 19:16:35,952 INFO L356 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-20 19:16:35,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 19:16:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 19:16:36,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:16:36,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970010294] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:36,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:16:36,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8] total 21 [2022-03-20 19:16:36,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546328710] [2022-03-20 19:16:36,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546328710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:36,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:36,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 19:16:36,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686842457] [2022-03-20 19:16:36,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:36,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 19:16:36,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 19:16:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:16:36,006 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:36,189 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-03-20 19:16:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:16:36,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2022-03-20 19:16:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:36,194 INFO L225 Difference]: With dead ends: 101 [2022-03-20 19:16:36,194 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 19:16:36,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:16:36,195 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:36,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 623 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-03-20 19:16:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 19:16:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2022-03-20 19:16:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 57 states have internal predecessors, (65), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2022-03-20 19:16:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-03-20 19:16:36,205 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 59 [2022-03-20 19:16:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:36,206 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-03-20 19:16:36,206 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-03-20 19:16:36,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 19:16:36,207 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:36,207 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:36,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 19:16:36,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 19:16:36,424 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:36,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:36,424 INFO L85 PathProgramCache]: Analyzing trace with hash 281114777, now seen corresponding path program 1 times [2022-03-20 19:16:36,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:36,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212645764] [2022-03-20 19:16:36,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:36,424 INFO L85 PathProgramCache]: Analyzing trace with hash 281114777, now seen corresponding path program 2 times [2022-03-20 19:16:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:36,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257100452] [2022-03-20 19:16:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:36,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 19:16:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 19:16:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 19:16:36,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257100452] [2022-03-20 19:16:36,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257100452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:36,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835590062] [2022-03-20 19:16:36,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:16:36,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:36,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:16:36,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 19:16:36,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:16:36,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:16:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 19:16:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:16:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:16:36,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:16:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:16:36,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835590062] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:36,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:16:36,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 8] total 18 [2022-03-20 19:16:36,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:36,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212645764] [2022-03-20 19:16:36,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212645764] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:36,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:36,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:16:36,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750787679] [2022-03-20 19:16:36,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:36,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:16:36,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:16:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:16:36,931 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:36,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:36,995 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2022-03-20 19:16:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:16:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2022-03-20 19:16:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:36,998 INFO L225 Difference]: With dead ends: 93 [2022-03-20 19:16:36,999 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 19:16:36,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:16:36,999 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:37,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 295 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:16:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 19:16:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-20 19:16:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 57 states have internal predecessors, (65), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-03-20 19:16:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2022-03-20 19:16:37,016 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 60 [2022-03-20 19:16:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:37,017 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2022-03-20 19:16:37,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2022-03-20 19:16:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 19:16:37,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:37,020 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:37,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 19:16:37,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:37,233 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash 589581770, now seen corresponding path program 1 times [2022-03-20 19:16:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:37,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1511879842] [2022-03-20 19:16:37,234 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash 589581770, now seen corresponding path program 2 times [2022-03-20 19:16:37,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:37,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801164195] [2022-03-20 19:16:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 19:16:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-20 19:16:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:16:37,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:37,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801164195] [2022-03-20 19:16:37,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801164195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:37,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925499180] [2022-03-20 19:16:37,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:16:37,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:37,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:16:37,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 19:16:37,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:16:37,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:16:37,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 19:16:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:16:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:16:37,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:16:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:16:37,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925499180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:16:37,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:16:37,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 19:16:37,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:37,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1511879842] [2022-03-20 19:16:37,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1511879842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:37,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:37,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:16:37,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317822014] [2022-03-20 19:16:37,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:37,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:16:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:37,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:16:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:16:37,597 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 19:16:39,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-03-20 19:16:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:40,017 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-03-20 19:16:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:16:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-03-20 19:16:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:40,020 INFO L225 Difference]: With dead ends: 125 [2022-03-20 19:16:40,020 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 19:16:40,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:16:40,021 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 76 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:40,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 56 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 293 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 19:16:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 19:16:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-03-20 19:16:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.2) internal successors, (66), 58 states have internal predecessors, (66), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-03-20 19:16:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-03-20 19:16:40,030 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 62 [2022-03-20 19:16:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:40,030 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-03-20 19:16:40,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 6 states have internal predecessors, (38), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 19:16:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-03-20 19:16:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 19:16:40,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:40,031 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:40,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 19:16:40,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:40,250 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 1 times [2022-03-20 19:16:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1304143043] [2022-03-20 19:16:40,251 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2146675487, now seen corresponding path program 2 times [2022-03-20 19:16:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877398020] [2022-03-20 19:16:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 19:16:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-20 19:16:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-20 19:16:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 19:16:40,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:40,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877398020] [2022-03-20 19:16:40,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877398020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:40,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714579284] [2022-03-20 19:16:40,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:16:40,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:40,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:16:40,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 19:16:40,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:16:40,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:16:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 19:16:40,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:16:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:16:40,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:16:40,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714579284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:40,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:16:40,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2022-03-20 19:16:40,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:40,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1304143043] [2022-03-20 19:16:40,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1304143043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:40,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:40,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:16:40,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897473787] [2022-03-20 19:16:40,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:40,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:16:40,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:16:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:16:40,580 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 19:16:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:40,687 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2022-03-20 19:16:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:16:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-03-20 19:16:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:40,689 INFO L225 Difference]: With dead ends: 101 [2022-03-20 19:16:40,689 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 19:16:40,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:16:40,689 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:40,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 384 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:16:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 19:16:40,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-03-20 19:16:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 19:16:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2022-03-20 19:16:40,696 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 64 [2022-03-20 19:16:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:40,697 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2022-03-20 19:16:40,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 19:16:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2022-03-20 19:16:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 19:16:40,697 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:40,697 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:40,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 19:16:40,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:40,911 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1758641907, now seen corresponding path program 1 times [2022-03-20 19:16:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:40,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090380888] [2022-03-20 19:16:40,912 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1758641907, now seen corresponding path program 2 times [2022-03-20 19:16:40,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:40,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000635501] [2022-03-20 19:16:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:40,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:40,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-20 19:16:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-20 19:16:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 19:16:41,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:41,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000635501] [2022-03-20 19:16:41,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000635501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:41,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228282412] [2022-03-20 19:16:41,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:16:41,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:41,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:41,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:16:41,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 19:16:41,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:16:41,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:16:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 19:16:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:16:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 19:16:41,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:16:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 19:16:41,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228282412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:16:41,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:16:41,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 13 [2022-03-20 19:16:41,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:41,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090380888] [2022-03-20 19:16:41,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090380888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:41,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:41,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:16:41,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641402424] [2022-03-20 19:16:41,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:41,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:16:41,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:16:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:16:41,359 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 19:16:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:41,677 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2022-03-20 19:16:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:16:41,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2022-03-20 19:16:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:41,679 INFO L225 Difference]: With dead ends: 107 [2022-03-20 19:16:41,679 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 19:16:41,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:16:41,679 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:41,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 55 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:16:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 19:16:41,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-03-20 19:16:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 19:16:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2022-03-20 19:16:41,687 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 63 [2022-03-20 19:16:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:41,687 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2022-03-20 19:16:41,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 19:16:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2022-03-20 19:16:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 19:16:41,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:41,688 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:41,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 19:16:41,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:41,904 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:41,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 3 times [2022-03-20 19:16:41,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:41,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902123415] [2022-03-20 19:16:41,905 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1560433451, now seen corresponding path program 4 times [2022-03-20 19:16:41,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:41,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99772260] [2022-03-20 19:16:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:41,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 19:16:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:41,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 19:16:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 19:16:42,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99772260] [2022-03-20 19:16:42,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99772260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175315297] [2022-03-20 19:16:42,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:16:42,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:42,030 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:16:42,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 19:16:42,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:16:42,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:16:42,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 19:16:42,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:16:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 19:16:42,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:16:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 19:16:42,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175315297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:16:42,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 19:16:42,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2022-03-20 19:16:42,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:16:42,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902123415] [2022-03-20 19:16:42,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902123415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:16:42,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:16:42,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:16:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607189167] [2022-03-20 19:16:42,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:16:42,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:16:42,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:16:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:16:42,584 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:16:43,091 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-03-20 19:16:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:16:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-03-20 19:16:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:16:43,092 INFO L225 Difference]: With dead ends: 95 [2022-03-20 19:16:43,092 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 19:16:43,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:16:43,093 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:16:43,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:16:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 19:16:43,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-03-20 19:16:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 13 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 19:16:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-03-20 19:16:43,100 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 65 [2022-03-20 19:16:43,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:16:43,100 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-03-20 19:16:43,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:16:43,100 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-03-20 19:16:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 19:16:43,101 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:16:43,101 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:16:43,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 19:16:43,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:43,315 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:16:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:16:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 1 times [2022-03-20 19:16:43,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:16:43,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1401559704] [2022-03-20 19:16:43,316 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:16:43,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1084413588, now seen corresponding path program 2 times [2022-03-20 19:16:43,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:16:43,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683411302] [2022-03-20 19:16:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:16:43,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:16:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:16:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:16:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:16:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-20 19:16:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 19:16:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 19:16:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-20 19:16:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:44,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-20 19:16:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:16:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 19:16:48,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:16:48,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683411302] [2022-03-20 19:16:48,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683411302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:16:48,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354857327] [2022-03-20 19:16:48,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:16:48,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:16:48,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:16:48,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:16:48,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 19:16:48,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:16:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:16:48,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 19:16:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:16:49,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-20 19:16:49,538 INFO L356 Elim1Store]: treesize reduction 151, result has 25.2 percent of original size [2022-03-20 19:16:49,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 68 [2022-03-20 19:16:50,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-20 19:16:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 19:16:50,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:16:50,723 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 19:16:50,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 176 [2022-03-20 19:16:50,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 19:16:50,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 19:16:50,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 19:16:50,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-20 19:16:50,901 INFO L356 Elim1Store]: treesize reduction 149, result has 55.4 percent of original size [2022-03-20 19:16:50,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 10 case distinctions, treesize of input 207 treesize of output 425