/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/nla-digbench-scaling/mannadiv_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 22:25:54,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 22:25:54,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 22:25:54,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 22:25:54,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 22:25:54,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 22:25:54,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 22:25:54,135 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 22:25:54,140 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 22:25:54,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 22:25:54,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 22:25:54,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 22:25:54,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 22:25:54,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 22:25:54,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 22:25:54,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 22:25:54,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 22:25:54,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 22:25:54,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 22:25:54,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 22:25:54,142 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 22:25:54,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 22:25:54,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 22:25:54,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 22:25:54,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 22:25:54,325 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 22:25:54,325 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 22:25:54,326 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound50.c [2022-03-20 22:25:54,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca765b940/20f2db01f05e42a6a9876337abdb62bf/FLAG25915027e [2022-03-20 22:25:54,714 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 22:25:54,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound50.c [2022-03-20 22:25:54,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca765b940/20f2db01f05e42a6a9876337abdb62bf/FLAG25915027e [2022-03-20 22:25:55,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca765b940/20f2db01f05e42a6a9876337abdb62bf [2022-03-20 22:25:55,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 22:25:55,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 22:25:55,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 22:25:55,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 22:25:55,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 22:25:55,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f27e36a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55, skipping insertion in model container [2022-03-20 22:25:55,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 22:25:55,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 22:25:55,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound50.c[573,586] [2022-03-20 22:25:55,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 22:25:55,303 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 22:25:55,314 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound50.c[573,586] [2022-03-20 22:25:55,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 22:25:55,332 INFO L208 MainTranslator]: Completed translation [2022-03-20 22:25:55,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55 WrapperNode [2022-03-20 22:25:55,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 22:25:55,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 22:25:55,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 22:25:55,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 22:25:55,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 22:25:55,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 22:25:55,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 22:25:55,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 22:25:55,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (1/1) ... [2022-03-20 22:25:55,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 22:25:55,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:55,396 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 22:25:55,398 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 22:25:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 22:25:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 22:25:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 22:25:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 22:25:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 22:25:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 22:25:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 22:25:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 22:25:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 22:25:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 22:25:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 22:25:55,458 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 22:25:55,459 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 22:25:55,546 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 22:25:55,561 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 22:25:55,561 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 22:25:55,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:25:55 BoogieIcfgContainer [2022-03-20 22:25:55,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 22:25:55,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 22:25:55,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 22:25:55,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 22:25:55,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:25:55" (1/3) ... [2022-03-20 22:25:55,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6e1c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:25:55, skipping insertion in model container [2022-03-20 22:25:55,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:25:55" (2/3) ... [2022-03-20 22:25:55,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d6e1c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:25:55, skipping insertion in model container [2022-03-20 22:25:55,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:25:55" (3/3) ... [2022-03-20 22:25:55,614 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_valuebound50.c [2022-03-20 22:25:55,617 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 22:25:55,618 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 22:25:55,654 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 22:25:55,659 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 22:25:55,659 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 22:25:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 22:25:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 22:25:55,689 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:55,689 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:55,690 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash -786972844, now seen corresponding path program 1 times [2022-03-20 22:25:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:55,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [79614084] [2022-03-20 22:25:55,717 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash -786972844, now seen corresponding path program 2 times [2022-03-20 22:25:55,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:55,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879502157] [2022-03-20 22:25:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:55,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:25:55,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 22:25:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:25:55,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 22:25:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:25:55,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 22:25:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:25:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:55,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:55,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879502157] [2022-03-20 22:25:55,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879502157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:55,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:55,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 22:25:55,909 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:55,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [79614084] [2022-03-20 22:25:55,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [79614084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:55,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:55,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 22:25:55,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890181387] [2022-03-20 22:25:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:55,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 22:25:55,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:55,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 22:25:55,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 22:25:55,938 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 22:25:55,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:55,995 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-03-20 22:25:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 22:25:55,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 22:25:55,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:56,006 INFO L225 Difference]: With dead ends: 51 [2022-03-20 22:25:56,006 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 22:25:56,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 22:25:56,011 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:56,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:25:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 22:25:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 22:25:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 22:25:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 22:25:56,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-20 22:25:56,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:56,050 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 22:25:56,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 22:25:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 22:25:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 22:25:56,051 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:56,052 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:56,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 22:25:56,052 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1131020600, now seen corresponding path program 1 times [2022-03-20 22:25:56,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:56,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891748407] [2022-03-20 22:25:56,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1131020600, now seen corresponding path program 2 times [2022-03-20 22:25:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:56,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021134274] [2022-03-20 22:25:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:56,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:56,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831676745] [2022-03-20 22:25:56,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:25:56,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:56,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:56,091 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 22:25:56,092 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 22:25:56,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 22:25:56,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:56,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 22:25:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:56,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 22:25:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021134274] [2022-03-20 22:25:56,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831676745] [2022-03-20 22:25:56,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831676745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:56,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:56,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:25:56,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891748407] [2022-03-20 22:25:56,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891748407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:56,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:56,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:25:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984237120] [2022-03-20 22:25:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:56,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 22:25:56,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 22:25:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 22:25:56,264 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 22:25:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:56,312 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-20 22:25:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 22:25:56,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 22:25:56,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:56,315 INFO L225 Difference]: With dead ends: 35 [2022-03-20 22:25:56,315 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 22:25:56,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 22:25:56,317 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:56,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 80 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:25:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 22:25:56,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-03-20 22:25:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 22:25:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 22:25:56,354 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2022-03-20 22:25:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:56,355 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 22:25:56,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 22:25:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 22:25:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 22:25:56,356 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:56,357 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:56,376 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 22:25:56,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:56,574 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1991967029, now seen corresponding path program 1 times [2022-03-20 22:25:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:56,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [571085388] [2022-03-20 22:25:56,575 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:56,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1991967029, now seen corresponding path program 2 times [2022-03-20 22:25:56,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:56,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340452681] [2022-03-20 22:25:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:56,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:56,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325006061] [2022-03-20 22:25:56,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:25:56,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:56,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:56,612 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 22:25:56,616 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 22:25:56,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:25:56,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 22:25:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:56,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:56,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:56,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340452681] [2022-03-20 22:25:56,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:56,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325006061] [2022-03-20 22:25:56,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325006061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:56,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:56,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 22:25:56,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:56,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [571085388] [2022-03-20 22:25:56,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [571085388] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:56,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:56,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 22:25:56,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185753785] [2022-03-20 22:25:56,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:56,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 22:25:56,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 22:25:56,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 22:25:56,945 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 22:25:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:56,989 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-20 22:25:56,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 22:25:56,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 22:25:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:56,989 INFO L225 Difference]: With dead ends: 30 [2022-03-20 22:25:56,990 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 22:25:56,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 22:25:56,991 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:56,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 111 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:25:56,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 22:25:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 22:25:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 22:25:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 22:25:56,992 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-03-20 22:25:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:56,992 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 22:25:56,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 22:25:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 22:25:56,992 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 22:25:56,994 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 22:25:57,023 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 22:25:57,211 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,SelfDestructingSolverStorable2 [2022-03-20 22:25:57,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 22:25:57,291 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2022-03-20 22:25:57,291 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2022-03-20 22:25:57,291 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2022-03-20 22:25:57,291 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2022-03-20 22:25:57,291 INFO L885 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: true [2022-03-20 22:25:57,292 INFO L885 garLoopResultBuilder]: At program point L13-2(lines 12 14) the Hoare annotation is: true [2022-03-20 22:25:57,292 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 12 14) the Hoare annotation is: true [2022-03-20 22:25:57,292 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 48) the Hoare annotation is: (let ((.cse0 (* main_~x2~0 main_~y1~0))) (and (= (+ .cse0 main_~y3~0 main_~y2~0) main_~x1~0) (= (+ .cse0 main_~y2~0) main_~x1~0))) [2022-03-20 22:25:57,292 INFO L885 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: true [2022-03-20 22:25:57,292 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 51) the Hoare annotation is: true [2022-03-20 22:25:57,292 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 51) the Hoare annotation is: true [2022-03-20 22:25:57,292 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 47) the Hoare annotation is: (= (+ (* main_~x2~0 main_~y1~0) main_~y3~0 main_~y2~0) main_~x1~0) [2022-03-20 22:25:57,292 INFO L878 garLoopResultBuilder]: At program point L40-2(lines 35 48) the Hoare annotation is: (= (+ (* main_~x2~0 main_~y1~0) main_~y3~0 main_~y2~0) main_~x1~0) [2022-03-20 22:25:57,292 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (= (+ (* main_~x2~0 main_~y1~0) main_~y3~0 main_~y2~0) main_~x1~0) [2022-03-20 22:25:57,292 INFO L878 garLoopResultBuilder]: At program point L36-1(lines 35 48) the Hoare annotation is: (= (+ (* main_~x2~0 main_~y1~0) main_~y3~0 main_~y2~0) main_~x1~0) [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 51) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 22:25:57,293 INFO L878 garLoopResultBuilder]: At program point L17(lines 17 18) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 22:25:57,294 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 19) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 22:25:57,294 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2022-03-20 22:25:57,294 INFO L878 garLoopResultBuilder]: At program point L16-2(lines 15 21) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 22:25:57,294 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 15 21) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-03-20 22:25:57,294 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 22:25:57,296 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2] [2022-03-20 22:25:57,297 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 22:25:57,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:25:57 BoogieIcfgContainer [2022-03-20 22:25:57,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 22:25:57,306 INFO L158 Benchmark]: Toolchain (without parser) took 2148.63ms. Allocated memory was 210.8MB in the beginning and 275.8MB in the end (delta: 65.0MB). Free memory was 155.7MB in the beginning and 205.0MB in the end (delta: -49.3MB). Peak memory consumption was 16.4MB. Max. memory is 8.0GB. [2022-03-20 22:25:57,306 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 210.8MB. Free memory is still 171.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 22:25:57,307 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.82ms. Allocated memory was 210.8MB in the beginning and 275.8MB in the end (delta: 65.0MB). Free memory was 155.4MB in the beginning and 247.4MB in the end (delta: -92.0MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-03-20 22:25:57,307 INFO L158 Benchmark]: Boogie Preprocessor took 32.69ms. Allocated memory is still 275.8MB. Free memory was 247.4MB in the beginning and 246.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 22:25:57,307 INFO L158 Benchmark]: RCFGBuilder took 195.64ms. Allocated memory is still 275.8MB. Free memory was 246.0MB in the beginning and 235.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 22:25:57,307 INFO L158 Benchmark]: TraceAbstraction took 1717.68ms. Allocated memory is still 275.8MB. Free memory was 235.1MB in the beginning and 205.0MB in the end (delta: 30.1MB). Peak memory consumption was 31.4MB. Max. memory is 8.0GB. [2022-03-20 22:25:57,308 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 210.8MB. Free memory is still 171.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.82ms. Allocated memory was 210.8MB in the beginning and 275.8MB in the end (delta: 65.0MB). Free memory was 155.4MB in the beginning and 247.4MB in the end (delta: -92.0MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.69ms. Allocated memory is still 275.8MB. Free memory was 247.4MB in the beginning and 246.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 195.64ms. Allocated memory is still 275.8MB. Free memory was 246.0MB in the beginning and 235.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1717.68ms. Allocated memory is still 275.8MB. Free memory was 235.1MB in the beginning and 205.0MB in the end (delta: 30.1MB). Peak memory consumption was 31.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 39 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 222 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 155 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76 IncrementalHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 67 mSDtfsCounter, 76 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 29 LocationsWithAnnotation, 61 PreInvPairs, 87 NumberOfFragments, 105 HoareAnnotationTreeSize, 61 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 29 FomulaSimplificationsInter, 98 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: x2 * y1 + y3 + y2 == x1 - ProcedureContractResult [Line: 12]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: 1 - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 15]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-03-20 22:25:57,331 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...