/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/sqrt1-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 05:20:08,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 05:20:08,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 05:20:08,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 05:20:09,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 05:20:09,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 05:20:09,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 05:20:09,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 05:20:09,035 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 05:20:09,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 05:20:09,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 05:20:09,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 05:20:09,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 05:20:09,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 05:20:09,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 05:20:09,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 05:20:09,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 05:20:09,037 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 05:20:09,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 05:20:09,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:20:09,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 05:20:09,038 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 05:20:09,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 05:20:09,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 05:20:09,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 05:20:09,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 05:20:09,218 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 05:20:09,219 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 05:20:09,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2022-03-18 05:20:09,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a2905ac/b68f642054b04cb8a24b8873c8d05d5a/FLAG264b35c31 [2022-03-18 05:20:09,635 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 05:20:09,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2022-03-18 05:20:09,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a2905ac/b68f642054b04cb8a24b8873c8d05d5a/FLAG264b35c31 [2022-03-18 05:20:09,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34a2905ac/b68f642054b04cb8a24b8873c8d05d5a [2022-03-18 05:20:09,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 05:20:09,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 05:20:09,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 05:20:09,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 05:20:09,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 05:20:09,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2482a4b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09, skipping insertion in model container [2022-03-18 05:20:09,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 05:20:09,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 05:20:09,816 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/sqrt1-ll_valuebound20.c[520,533] [2022-03-18 05:20:09,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:20:09,838 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 05:20:09,849 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/sqrt1-ll_valuebound20.c[520,533] [2022-03-18 05:20:09,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:20:09,866 INFO L208 MainTranslator]: Completed translation [2022-03-18 05:20:09,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09 WrapperNode [2022-03-18 05:20:09,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 05:20:09,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 05:20:09,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 05:20:09,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 05:20:09,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 05:20:09,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 05:20:09,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 05:20:09,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 05:20:09,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (1/1) ... [2022-03-18 05:20:09,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:20:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:20:09,925 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) [2022-03-18 05:20:09,943 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 [2022-03-18 05:20:09,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 05:20:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 05:20:09,973 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 05:20:09,978 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 05:20:09,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 05:20:09,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 05:20:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 05:20:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 05:20:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 05:20:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 05:20:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 05:20:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 05:20:09,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 05:20:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 05:20:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 05:20:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 05:20:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 05:20:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 05:20:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 05:20:09,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 05:20:10,029 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 05:20:10,030 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 05:20:10,145 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 05:20:10,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 05:20:10,163 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 05:20:10,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:20:10 BoogieIcfgContainer [2022-03-18 05:20:10,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 05:20:10,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 05:20:10,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 05:20:10,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 05:20:10,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:20:09" (1/3) ... [2022-03-18 05:20:10,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777078c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:20:10, skipping insertion in model container [2022-03-18 05:20:10,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:20:09" (2/3) ... [2022-03-18 05:20:10,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777078c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:20:10, skipping insertion in model container [2022-03-18 05:20:10,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:20:10" (3/3) ... [2022-03-18 05:20:10,176 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound20.c [2022-03-18 05:20:10,180 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 05:20:10,180 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 05:20:10,215 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 05:20:10,219 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 [2022-03-18 05:20:10,220 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 05:20:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 05:20:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 05:20:10,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:20:10,235 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:20:10,236 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:20:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:20:10,239 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-03-18 05:20:10,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:10,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062543513] [2022-03-18 05:20:10,251 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:20:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times [2022-03-18 05:20:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:20:10,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161205910] [2022-03-18 05:20:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:20:10,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:20:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:20:10,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:20:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:20:10,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:20:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:20:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:20:10,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:20:10,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161205910] [2022-03-18 05:20:10,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161205910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:10,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:10,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 05:20:10,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:20:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062543513] [2022-03-18 05:20:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062543513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:10,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:10,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 05:20:10,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451178611] [2022-03-18 05:20:10,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:20:10,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 05:20:10,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 05:20:10,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 05:20:10,467 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:20:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:20:10,539 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-03-18 05:20:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 05:20:10,542 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 05:20:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:20:10,548 INFO L225 Difference]: With dead ends: 53 [2022-03-18 05:20:10,549 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 05:20:10,551 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 05:20:10,555 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:20:10,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:20:10,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 05:20:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-18 05:20:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 05:20:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-03-18 05:20:10,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-03-18 05:20:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:20:10,586 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-03-18 05:20:10,586 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:20:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-03-18 05:20:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 05:20:10,588 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:20:10,588 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:20:10,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 05:20:10,589 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:20:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:20:10,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-03-18 05:20:10,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:10,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89098507] [2022-03-18 05:20:10,591 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:20:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times [2022-03-18 05:20:10,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:20:10,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320306182] [2022-03-18 05:20:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:20:10,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:20:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:20:10,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:20:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:20:10,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:20:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:20:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:20:10,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:20:10,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320306182] [2022-03-18 05:20:10,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320306182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:10,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:10,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:20:10,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:20:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89098507] [2022-03-18 05:20:10,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89098507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:10,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:10,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:20:10,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648524295] [2022-03-18 05:20:10,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:20:10,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:20:10,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:20:10,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:20:10,724 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:20:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:20:10,906 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-18 05:20:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 05:20:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 05:20:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:20:10,907 INFO L225 Difference]: With dead ends: 40 [2022-03-18 05:20:10,907 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 05:20:10,908 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:20:10,909 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:20:10,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:20:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 05:20:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-18 05:20:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 05:20:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-18 05:20:10,918 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-03-18 05:20:10,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:20:10,918 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-18 05:20:10,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:20:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-18 05:20:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 05:20:10,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:20:10,919 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:20:10,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 05:20:10,920 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:20:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:20:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-03-18 05:20:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:10,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [863068951] [2022-03-18 05:20:10,921 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:20:10,921 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 2 times [2022-03-18 05:20:10,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:20:10,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095680599] [2022-03-18 05:20:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:20:10,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:20:10,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:20:10,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738770762] [2022-03-18 05:20:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 05:20:10,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:20:10,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:20:10,951 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) [2022-03-18 05:20:10,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 05:20:11,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 05:20:11,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 05:20:11,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 05:20:11,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:20:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:20:11,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:20:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:20:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095680599] [2022-03-18 05:20:11,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:20:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738770762] [2022-03-18 05:20:11,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738770762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:11,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:11,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:20:11,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:20:11,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [863068951] [2022-03-18 05:20:11,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [863068951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:11,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:11,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:20:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764810266] [2022-03-18 05:20:11,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:20:11,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:20:11,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:20:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:20:11,095 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 05:20:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:20:11,125 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-18 05:20:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 05:20:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 05:20:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:20:11,126 INFO L225 Difference]: With dead ends: 44 [2022-03-18 05:20:11,126 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 05:20:11,126 INFO L911 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 [2022-03-18 05:20:11,127 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:20:11,128 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:20:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 05:20:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-18 05:20:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 05:20:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-03-18 05:20:11,136 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-03-18 05:20:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:20:11,136 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-03-18 05:20:11,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 05:20:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-03-18 05:20:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 05:20:11,137 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:20:11,137 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:20:11,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 05:20:11,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:20:11,354 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:20:11,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:20:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2022-03-18 05:20:11,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:11,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909660460] [2022-03-18 05:20:11,355 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:20:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 2 times [2022-03-18 05:20:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:20:11,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590851498] [2022-03-18 05:20:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:20:11,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:20:11,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:20:11,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241756565] [2022-03-18 05:20:11,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 05:20:11,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:20:11,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:20:11,372 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) [2022-03-18 05:20:11,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 05:20:11,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 05:20:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 05:20:11,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 05:20:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:20:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 05:20:11,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:20:11,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:20:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590851498] [2022-03-18 05:20:11,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:20:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241756565] [2022-03-18 05:20:11,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241756565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:11,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:11,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:20:11,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:20:11,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909660460] [2022-03-18 05:20:11,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909660460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:11,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:11,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:20:11,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575033087] [2022-03-18 05:20:11,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:20:11,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:20:11,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:20:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:20:11,492 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 05:20:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:20:11,531 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-03-18 05:20:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 05:20:11,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-18 05:20:11,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:20:11,536 INFO L225 Difference]: With dead ends: 48 [2022-03-18 05:20:11,536 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 05:20:11,536 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:20:11,537 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:20:11,537 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:20:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 05:20:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 05:20:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 05:20:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-03-18 05:20:11,544 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2022-03-18 05:20:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:20:11,544 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-03-18 05:20:11,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 05:20:11,545 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-03-18 05:20:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 05:20:11,545 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:20:11,545 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:20:11,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 05:20:11,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 05:20:11,767 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:20:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:20:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2022-03-18 05:20:11,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:11,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1349991706] [2022-03-18 05:20:12,220 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 05:20:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1589942244, now seen corresponding path program 1 times [2022-03-18 05:20:12,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:20:12,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162791580] [2022-03-18 05:20:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:20:12,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:20:12,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:20:12,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716923351] [2022-03-18 05:20:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:20:12,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:20:12,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:20:12,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 05:20:12,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 05:20:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:20:12,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 05:20:12,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:20:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:20:12,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:20:12,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:20:12,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162791580] [2022-03-18 05:20:12,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:20:12,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716923351] [2022-03-18 05:20:12,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716923351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:12,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:12,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:20:46,719 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:20:46,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:20:46,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1349991706] [2022-03-18 05:20:46,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1349991706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:46,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:46,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 05:20:46,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573808775] [2022-03-18 05:20:46,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:20:46,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 05:20:46,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 05:20:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=234, Unknown=11, NotChecked=0, Total=306 [2022-03-18 05:20:46,776 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 05:21:01,014 WARN L232 SmtUtils]: Spent 10.08s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:21:03,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:21:05,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:21:07,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:21:09,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:21:09,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:21:09,233 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-03-18 05:21:09,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:21:09,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-03-18 05:21:09,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:21:09,234 INFO L225 Difference]: With dead ends: 57 [2022-03-18 05:21:09,234 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 05:21:09,234 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=89, Invalid=360, Unknown=13, NotChecked=0, Total=462 [2022-03-18 05:21:09,235 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:21:09,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 263 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 129 Invalid, 4 Unknown, 41 Unchecked, 8.2s Time] [2022-03-18 05:21:09,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 05:21:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-18 05:21:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 05:21:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-18 05:21:09,243 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 34 [2022-03-18 05:21:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:21:09,243 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-18 05:21:09,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 05:21:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-18 05:21:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 05:21:09,244 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:21:09,245 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:21:09,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 05:21:09,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:21:09,461 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:21:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:21:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash -985423115, now seen corresponding path program 1 times [2022-03-18 05:21:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:21:09,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [658691182] [2022-03-18 05:21:09,895 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 05:21:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1515990761, now seen corresponding path program 1 times [2022-03-18 05:21:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:21:09,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566925540] [2022-03-18 05:21:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:21:09,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:21:09,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:21:09,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537369556] [2022-03-18 05:21:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:21:09,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:21:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:21:09,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 05:21:09,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 05:21:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:21:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 05:21:09,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:21:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 05:21:10,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 05:21:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 05:21:10,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:21:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566925540] [2022-03-18 05:21:10,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:21:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537369556] [2022-03-18 05:21:10,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537369556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 05:21:10,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 05:21:10,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-18 05:21:46,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:21:46,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [658691182] [2022-03-18 05:21:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [658691182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:21:46,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:21:46,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:21:46,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784468923] [2022-03-18 05:21:46,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:21:46,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:21:46,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:21:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:21:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-03-18 05:21:46,609 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 05:22:00,877 WARN L232 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:22:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:22:01,120 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-03-18 05:22:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:22:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-18 05:22:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:22:01,121 INFO L225 Difference]: With dead ends: 54 [2022-03-18 05:22:01,121 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 05:22:01,121 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=119, Invalid=466, Unknown=15, NotChecked=0, Total=600 [2022-03-18 05:22:01,123 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:22:01,123 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 185 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-03-18 05:22:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 05:22:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 05:22:01,124 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) [2022-03-18 05:22:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 05:22:01,124 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2022-03-18 05:22:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:22:01,124 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 05:22:01,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 05:22:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 05:22:01,124 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 05:22:01,126 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 05:22:01,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 05:22:01,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:22:01,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 05:22:20,263 WARN L232 SmtUtils]: Spent 10.65s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:22:36,373 WARN L232 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:22:53,856 WARN L232 SmtUtils]: Spent 17.48s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:22:53,892 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-18 05:22:53,892 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-18 05:22:53,892 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-18 05:22:53,893 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-18 05:22:53,893 INFO L885 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: true [2022-03-18 05:22:53,893 INFO L885 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: true [2022-03-18 05:22:53,893 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: true [2022-03-18 05:22:53,893 INFO L878 garLoopResultBuilder]: At program point L33(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:22:53,893 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:22:53,893 INFO L878 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:22:53,893 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-03-18 05:22:53,893 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-03-18 05:22:53,893 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-03-18 05:22:53,893 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:22:53,893 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:22:53,893 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-18 05:22:53,893 INFO L878 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse1 (* main_~a~0 2))) (let ((.cse0 (= main_~t~0 (+ .cse1 1)))) (or (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) .cse0) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (= (+ .cse1 (* main_~a~0 main_~a~0) 1) main_~s~0) .cse0)))) [2022-03-18 05:22:53,893 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: true [2022-03-18 05:22:53,894 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 05:22:53,894 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|)) [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 05:22:53,894 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-18 05:22:53,894 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 05:22:53,894 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:22:53,894 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:22:53,894 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:22:53,895 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 05:22:53,897 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 05:22:53,897 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 05:22:53,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:22:53 BoogieIcfgContainer [2022-03-18 05:22:53,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 05:22:53,925 INFO L158 Benchmark]: Toolchain (without parser) took 164267.51ms. Allocated memory was 188.7MB in the beginning and 243.3MB in the end (delta: 54.5MB). Free memory was 139.4MB in the beginning and 125.1MB in the end (delta: 14.3MB). Peak memory consumption was 70.2MB. Max. memory is 8.0GB. [2022-03-18 05:22:53,925 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 156.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 05:22:53,926 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.90ms. Allocated memory is still 188.7MB. Free memory was 139.2MB in the beginning and 165.5MB in the end (delta: -26.3MB). Peak memory consumption was 16.1MB. Max. memory is 8.0GB. [2022-03-18 05:22:53,926 INFO L158 Benchmark]: Boogie Preprocessor took 34.19ms. Allocated memory is still 188.7MB. Free memory was 165.5MB in the beginning and 164.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 05:22:53,926 INFO L158 Benchmark]: RCFGBuilder took 261.86ms. Allocated memory is still 188.7MB. Free memory was 164.2MB in the beginning and 154.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 05:22:53,926 INFO L158 Benchmark]: TraceAbstraction took 163758.77ms. Allocated memory was 188.7MB in the beginning and 243.3MB in the end (delta: 54.5MB). Free memory was 153.7MB in the beginning and 125.1MB in the end (delta: 28.6MB). Peak memory consumption was 84.6MB. Max. memory is 8.0GB. [2022-03-18 05:22:53,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 156.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.90ms. Allocated memory is still 188.7MB. Free memory was 139.2MB in the beginning and 165.5MB in the end (delta: -26.3MB). Peak memory consumption was 16.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.19ms. Allocated memory is still 188.7MB. Free memory was 165.5MB in the beginning and 164.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 261.86ms. Allocated memory is still 188.7MB. Free memory was 164.2MB in the beginning and 154.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 163758.77ms. Allocated memory was 188.7MB in the beginning and 243.3MB in the end (delta: 54.5MB). Free memory was 153.7MB in the beginning and 125.1MB in the end (delta: 28.6MB). Peak memory consumption was 84.6MB. 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: 14]: 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, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 163.7s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 37.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 52.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 8.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 752 SdHoareTripleChecker+Invalid, 8.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 74 IncrementalHoareTripleChecker+Unchecked, 579 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 400 IncrementalHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 173 mSDtfsCounter, 400 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 99.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=5, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 133 PreInvPairs, 191 NumberOfFragments, 293 HoareAnnotationTreeSize, 133 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 31 FomulaSimplificationsInter, 1707 FormulaSimplificationTreeSizeReductionInter, 52.5s 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: 30]: Loop Invariant Derived loop invariant: ((t == 1 && t * 2 + t * t + 1 == s * 4) && t == a * 2 + 1) || ((s <= n + t && a * 2 + a * a + 1 == s) && t == a * 2 + 1) - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: 1 - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: ((!(1 <= \old(cond)) || 1 <= cond) && (\old(cond) == 0 || !(cond == 0))) && (!(\old(cond) == 1) || \old(cond) == cond) RESULT: Ultimate proved your program to be correct! [2022-03-18 05:22:53,961 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...