/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:33:19,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:33:19,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:33:19,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:33:19,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:33:19,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:33:19,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:33:19,375 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:33:19,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:33:19,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:33:19,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:33:19,383 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:33:19,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:33:19,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:33:19,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:33:19,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:33:19,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:33:19,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:33:19,384 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:33:19,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:33:19,384 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:33:19,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:33:19,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:33:19,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:33:19,385 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:33:19,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:33:19,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:33:19,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:33:19,553 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:33:19,554 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:33:19,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_2-2.c [2022-04-06 14:33:19,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e289484d0/9e74fb30d65048bf9deb7dc814711bc0/FLAG5a212c3b6 [2022-04-06 14:33:19,952 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:33:19,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_2-2.c [2022-04-06 14:33:19,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e289484d0/9e74fb30d65048bf9deb7dc814711bc0/FLAG5a212c3b6 [2022-04-06 14:33:19,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e289484d0/9e74fb30d65048bf9deb7dc814711bc0 [2022-04-06 14:33:19,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:33:19,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:33:19,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:33:19,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:33:19,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:33:19,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:33:19" (1/1) ... [2022-04-06 14:33:19,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f15bdf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:19, skipping insertion in model container [2022-04-06 14:33:19,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:33:19" (1/1) ... [2022-04-06 14:33:19,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:33:19,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:33:20,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_2-2.c[373,386] [2022-04-06 14:33:20,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:33:20,136 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:33:20,143 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_2-2.c[373,386] [2022-04-06 14:33:20,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:33:20,156 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:33:20,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20 WrapperNode [2022-04-06 14:33:20,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:33:20,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:33:20,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:33:20,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:33:20,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (1/1) ... [2022-04-06 14:33:20,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (1/1) ... [2022-04-06 14:33:20,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (1/1) ... [2022-04-06 14:33:20,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (1/1) ... [2022-04-06 14:33:20,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (1/1) ... [2022-04-06 14:33:20,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (1/1) ... [2022-04-06 14:33:20,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (1/1) ... [2022-04-06 14:33:20,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:33:20,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:33:20,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:33:20,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:33:20,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (1/1) ... [2022-04-06 14:33:20,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:33:20,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:33:20,203 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 14:33:20,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 14:33:20,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:33:20,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:33:20,226 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:33:20,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:33:20,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:33:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:33:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:33:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:33:20,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:33:20,267 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:33:20,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:33:20,362 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:33:20,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:33:20,366 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 14:33:20,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:33:20 BoogieIcfgContainer [2022-04-06 14:33:20,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:33:20,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:33:20,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:33:20,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:33:20,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:33:19" (1/3) ... [2022-04-06 14:33:20,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1645af1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:33:20, skipping insertion in model container [2022-04-06 14:33:20,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:33:20" (2/3) ... [2022-04-06 14:33:20,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1645af1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:33:20, skipping insertion in model container [2022-04-06 14:33:20,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:33:20" (3/3) ... [2022-04-06 14:33:20,374 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-2.c [2022-04-06 14:33:20,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:33:20,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:33:20,406 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:33:20,411 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 14:33:20,411 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:33:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:33:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 14:33:20,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:20,425 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:20,426 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash -154663714, now seen corresponding path program 1 times [2022-04-06 14:33:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:20,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [593159813] [2022-04-06 14:33:20,442 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:33:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash -154663714, now seen corresponding path program 2 times [2022-04-06 14:33:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:20,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270919137] [2022-04-06 14:33:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:20,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:20,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:20,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:20,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270919137] [2022-04-06 14:33:20,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270919137] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:20,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:20,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:33:20,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:20,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [593159813] [2022-04-06 14:33:20,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [593159813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:20,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:20,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:33:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524997330] [2022-04-06 14:33:20,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:20,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:33:20,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:33:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:33:20,605 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:20,656 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-04-06 14:33:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:33:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 14:33:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:20,662 INFO L225 Difference]: With dead ends: 39 [2022-04-06 14:33:20,662 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 14:33:20,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:33:20,666 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:20,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:33:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 14:33:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 14:33:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-04-06 14:33:20,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 11 [2022-04-06 14:33:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:20,692 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-04-06 14:33:20,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-04-06 14:33:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 14:33:20,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:20,693 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:20,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:33:20,693 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -213769058, now seen corresponding path program 1 times [2022-04-06 14:33:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:20,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [816959031] [2022-04-06 14:33:20,695 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:33:20,695 INFO L85 PathProgramCache]: Analyzing trace with hash -213769058, now seen corresponding path program 2 times [2022-04-06 14:33:20,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:20,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908415189] [2022-04-06 14:33:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:20,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:20,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:20,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:20,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908415189] [2022-04-06 14:33:20,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908415189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:20,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:20,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:33:20,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [816959031] [2022-04-06 14:33:20,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [816959031] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:20,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:20,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:33:20,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44695176] [2022-04-06 14:33:20,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:20,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:33:20,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:20,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:33:20,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:33:20,795 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:20,871 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-04-06 14:33:20,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:33:20,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 14:33:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:20,873 INFO L225 Difference]: With dead ends: 29 [2022-04-06 14:33:20,873 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 14:33:20,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:33:20,874 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:20,874 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:33:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 14:33:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 14:33:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2022-04-06 14:33:20,889 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 11 [2022-04-06 14:33:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:20,889 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2022-04-06 14:33:20,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2022-04-06 14:33:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 14:33:20,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:20,890 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:20,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:33:20,890 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:20,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1726513949, now seen corresponding path program 1 times [2022-04-06 14:33:20,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:20,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [789345739] [2022-04-06 14:33:20,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-06 14:33:20,924 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:33:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash 279245208, now seen corresponding path program 1 times [2022-04-06 14:33:20,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:20,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358218982] [2022-04-06 14:33:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:20,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:33:20,945 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 14:33:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 14:33:20,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 14:33:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1726513949, now seen corresponding path program 2 times [2022-04-06 14:33:20,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:20,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915329506] [2022-04-06 14:33:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:20,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:20,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:33:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:33:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:33:21,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:33:21,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915329506] [2022-04-06 14:33:21,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915329506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:21,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:21,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:33:21,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:21,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [789345739] [2022-04-06 14:33:21,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [789345739] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:21,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:21,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:33:21,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795487096] [2022-04-06 14:33:21,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:21,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:33:21,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:21,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:33:21,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:33:21,010 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:33:21,100 INFO L93 Difference]: Finished difference Result 51 states and 82 transitions. [2022-04-06 14:33:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:33:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 14:33:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:33:21,102 INFO L225 Difference]: With dead ends: 51 [2022-04-06 14:33:21,102 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 14:33:21,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:33:21,106 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:33:21,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:33:21,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 14:33:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 14:33:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-04-06 14:33:21,115 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 22 [2022-04-06 14:33:21,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:33:21,115 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-04-06 14:33:21,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:33:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-04-06 14:33:21,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 14:33:21,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:33:21,116 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:33:21,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,SelfDestructingSolverStorable2 [2022-04-06 14:33:21,116 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:33:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:33:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash 622763737, now seen corresponding path program 1 times [2022-04-06 14:33:21,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:21,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912081924] [2022-04-06 14:33:21,194 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:33:21,195 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 14:33:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 338350552, now seen corresponding path program 1 times [2022-04-06 14:33:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:33:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467658082] [2022-04-06 14:33:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:33:21,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:33:21,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 14:33:21,202 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:91) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:289) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:412) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms at de.uni_freiburg.informatik.ultimate.logic.NoopScript.annotate(NoopScript.java:471) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.annotate(WrapperScript.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertTerm(AnnotateAndAssertCodeBlocks.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAssertCodeBlocks.annotateAndAssertNonCall(AnnotateAndAssertCodeBlocks.java:109) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserter.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserter.java:101) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:313) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 40 more [2022-04-06 14:33:21,205 INFO L158 Benchmark]: Toolchain (without parser) took 1237.77ms. Allocated memory was 170.9MB in the beginning and 218.1MB in the end (delta: 47.2MB). Free memory was 119.1MB in the beginning and 122.5MB in the end (delta: -3.4MB). Peak memory consumption was 44.3MB. Max. memory is 8.0GB. [2022-04-06 14:33:21,205 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 170.9MB. Free memory was 135.5MB in the beginning and 135.3MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 14:33:21,205 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.58ms. Allocated memory was 170.9MB in the beginning and 218.1MB in the end (delta: 47.2MB). Free memory was 119.0MB in the beginning and 193.8MB in the end (delta: -74.9MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-04-06 14:33:21,206 INFO L158 Benchmark]: Boogie Preprocessor took 20.88ms. Allocated memory is still 218.1MB. Free memory was 193.8MB in the beginning and 192.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 14:33:21,206 INFO L158 Benchmark]: RCFGBuilder took 188.73ms. Allocated memory is still 218.1MB. Free memory was 192.3MB in the beginning and 180.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 14:33:21,206 INFO L158 Benchmark]: TraceAbstraction took 835.52ms. Allocated memory is still 218.1MB. Free memory was 179.7MB in the beginning and 122.5MB in the end (delta: 57.1MB). Peak memory consumption was 57.7MB. Max. memory is 8.0GB. [2022-04-06 14:33:21,207 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 170.9MB. Free memory was 135.5MB in the beginning and 135.3MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.58ms. Allocated memory was 170.9MB in the beginning and 218.1MB in the end (delta: 47.2MB). Free memory was 119.0MB in the beginning and 193.8MB in the end (delta: -74.9MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.88ms. Allocated memory is still 218.1MB. Free memory was 193.8MB in the beginning and 192.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 188.73ms. Allocated memory is still 218.1MB. Free memory was 192.3MB in the beginning and 180.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 835.52ms. Allocated memory is still 218.1MB. Free memory was 179.7MB in the beginning and 122.5MB in the end (delta: 57.1MB). Peak memory consumption was 57.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Cannot name open terms: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-04-06 14:33:21,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...