/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/sqrt1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 01:22:06,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 01:22:06,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 01:22:06,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 01:22:06,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 01:22:06,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 01:22:06,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 01:22:06,401 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 01:22:06,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 01:22:06,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 01:22:06,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 01:22:06,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 01:22:06,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 01:22:06,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 01:22:06,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 01:22:06,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 01:22:06,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 01:22:06,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 01:22:06,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 01:22:06,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 01:22:06,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 01:22:06,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 01:22:06,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 01:22:06,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:22:06,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 01:22:06,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 01:22:06,417 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 01:22:06,417 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 01:22:06,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 01:22:06,417 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 01:22:06,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 01:22:06,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 01:22:06,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 01:22:06,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 01:22:06,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 01:22:06,680 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 01:22:06,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1-ll.c [2022-03-18 01:22:06,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c75c5a9d4/d849dde5b56b4ea399e33540ee4c3c03/FLAG713280f37 [2022-03-18 01:22:07,160 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 01:22:07,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c [2022-03-18 01:22:07,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c75c5a9d4/d849dde5b56b4ea399e33540ee4c3c03/FLAG713280f37 [2022-03-18 01:22:07,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c75c5a9d4/d849dde5b56b4ea399e33540ee4c3c03 [2022-03-18 01:22:07,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 01:22:07,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 01:22:07,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 01:22:07,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 01:22:07,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 01:22:07,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f2d9295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07, skipping insertion in model container [2022-03-18 01:22:07,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 01:22:07,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 01:22:07,337 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/sqrt1-ll.c[520,533] [2022-03-18 01:22:07,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:22:07,360 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 01:22:07,368 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/sqrt1-ll.c[520,533] [2022-03-18 01:22:07,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:22:07,381 INFO L208 MainTranslator]: Completed translation [2022-03-18 01:22:07,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07 WrapperNode [2022-03-18 01:22:07,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 01:22:07,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 01:22:07,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 01:22:07,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 01:22:07,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 01:22:07,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 01:22:07,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 01:22:07,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 01:22:07,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (1/1) ... [2022-03-18 01:22:07,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:22:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:22:07,443 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 01:22:07,455 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 01:22:07,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 01:22:07,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 01:22:07,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 01:22:07,481 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 01:22:07,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 01:22:07,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 01:22:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 01:22:07,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 01:22:07,483 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 01:22:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 01:22:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 01:22:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 01:22:07,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 01:22:07,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 01:22:07,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 01:22:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 01:22:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 01:22:07,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 01:22:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 01:22:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 01:22:07,546 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 01:22:07,548 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 01:22:07,692 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 01:22:07,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 01:22:07,697 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 01:22:07,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:22:07 BoogieIcfgContainer [2022-03-18 01:22:07,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 01:22:07,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 01:22:07,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 01:22:07,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 01:22:07,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:22:07" (1/3) ... [2022-03-18 01:22:07,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be41931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:22:07, skipping insertion in model container [2022-03-18 01:22:07,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:22:07" (2/3) ... [2022-03-18 01:22:07,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be41931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:22:07, skipping insertion in model container [2022-03-18 01:22:07,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:22:07" (3/3) ... [2022-03-18 01:22:07,719 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll.c [2022-03-18 01:22:07,727 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 01:22:07,728 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 01:22:07,802 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 01:22:07,824 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 01:22:07,824 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 01:22:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 01:22:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 01:22:07,848 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:22:07,848 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:22:07,853 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:22:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:22:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash 515438393, now seen corresponding path program 1 times [2022-03-18 01:22:07,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:07,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481446839] [2022-03-18 01:22:07,880 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:22:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash 515438393, now seen corresponding path program 2 times [2022-03-18 01:22:07,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:22:07,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485082904] [2022-03-18 01:22:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:07,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:22:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:22:08,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:22:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:22:08,065 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 01:22:08,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:22:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485082904] [2022-03-18 01:22:08,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485082904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:08,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:08,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:22:08,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:22:08,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481446839] [2022-03-18 01:22:08,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481446839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:08,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:08,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:22:08,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615445985] [2022-03-18 01:22:08,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:22:08,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 01:22:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 01:22:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 01:22:08,109 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:22:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:22:08,195 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2022-03-18 01:22:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 01:22:08,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 01:22:08,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:22:08,209 INFO L225 Difference]: With dead ends: 44 [2022-03-18 01:22:08,209 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 01:22:08,213 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 01:22:08,216 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:22:08,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:22:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 01:22:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 01:22:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 01:22:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-03-18 01:22:08,268 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-03-18 01:22:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:22:08,269 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-03-18 01:22:08,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:22:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-03-18 01:22:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 01:22:08,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:22:08,273 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:22:08,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 01:22:08,275 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:22:08,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:22:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash 517106689, now seen corresponding path program 1 times [2022-03-18 01:22:08,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:08,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [56928555] [2022-03-18 01:22:08,277 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:22:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash 517106689, now seen corresponding path program 2 times [2022-03-18 01:22:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:22:08,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933865172] [2022-03-18 01:22:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:08,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:22:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:22:08,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:22:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:22:08,418 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 01:22:08,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:22:08,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933865172] [2022-03-18 01:22:08,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933865172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:08,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:08,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:22:08,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:22:08,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [56928555] [2022-03-18 01:22:08,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [56928555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:08,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:08,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 01:22:08,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931174276] [2022-03-18 01:22:08,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:22:08,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 01:22:08,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:08,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 01:22:08,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:22:08,422 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:22:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:22:08,605 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-03-18 01:22:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 01:22:08,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 01:22:08,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:22:08,608 INFO L225 Difference]: With dead ends: 34 [2022-03-18 01:22:08,608 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 01:22:08,609 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 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 01:22:08,610 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:22:08,610 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:22:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 01:22:08,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-03-18 01:22:08,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 01:22:08,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-18 01:22:08,670 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 11 [2022-03-18 01:22:08,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:22:08,670 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-18 01:22:08,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 01:22:08,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-18 01:22:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 01:22:08,671 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:22:08,671 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:22:08,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 01:22:08,671 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:22:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:22:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1248765655, now seen corresponding path program 1 times [2022-03-18 01:22:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:08,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [790304703] [2022-03-18 01:22:08,673 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:22:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1248765655, now seen corresponding path program 2 times [2022-03-18 01:22:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:22:08,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082226297] [2022-03-18 01:22:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:08,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:22:08,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:22:08,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229165461] [2022-03-18 01:22:08,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:22:08,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:22:08,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:22:08,695 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 01:22:08,700 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 01:22:08,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:22:08,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:22:08,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 01:22:08,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:22:08,847 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 01:22:08,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:22:08,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:22:08,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082226297] [2022-03-18 01:22:08,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:22:08,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229165461] [2022-03-18 01:22:08,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229165461] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:08,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:08,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:22:08,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:22:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [790304703] [2022-03-18 01:22:08,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [790304703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:08,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:08,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:22:08,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971478106] [2022-03-18 01:22:08,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:22:08,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:22:08,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:08,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:22:08,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:22:08,853 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:22:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:22:08,913 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-03-18 01:22:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:22:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-03-18 01:22:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:22:08,916 INFO L225 Difference]: With dead ends: 38 [2022-03-18 01:22:08,916 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 01:22:08,917 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 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 01:22:08,922 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:22:08,922 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:22:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 01:22:08,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-18 01:22:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 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 01:22:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-18 01:22:08,932 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 16 [2022-03-18 01:22:08,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:22:08,932 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-18 01:22:08,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 01:22:08,933 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-18 01:22:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 01:22:08,933 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:22:08,934 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:22:08,954 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 01:22:09,143 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 01:22:09,144 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:22:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:22:09,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1451064513, now seen corresponding path program 1 times [2022-03-18 01:22:09,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:09,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [152203041] [2022-03-18 01:22:09,145 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:22:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1451064513, now seen corresponding path program 2 times [2022-03-18 01:22:09,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:22:09,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833454338] [2022-03-18 01:22:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:09,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:22:09,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:22:09,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40706094] [2022-03-18 01:22:09,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:22:09,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:22:09,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:22:09,157 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 01:22:09,161 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 01:22:09,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:22:09,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:22:09,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 01:22:09,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:22:09,296 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 01:22:09,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:22:09,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:22:09,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833454338] [2022-03-18 01:22:09,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:22:09,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40706094] [2022-03-18 01:22:09,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40706094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:09,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:09,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:22:09,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:22:09,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [152203041] [2022-03-18 01:22:09,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [152203041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:09,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:09,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:22:09,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284997103] [2022-03-18 01:22:09,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:22:09,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:22:09,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:09,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:22:09,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:22:09,301 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 01:22:09,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:22:09,342 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-03-18 01:22:09,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:22:09,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 21 [2022-03-18 01:22:09,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:22:09,344 INFO L225 Difference]: With dead ends: 42 [2022-03-18 01:22:09,344 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 01:22:09,345 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 01:22:09,345 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:22:09,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:22:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 01:22:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-18 01:22:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 01:22:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-18 01:22:09,354 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 21 [2022-03-18 01:22:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:22:09,354 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-18 01:22:09,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 01:22:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-18 01:22:09,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 01:22:09,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:22:09,359 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:22:09,383 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 01:22:09,582 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 01:22:09,582 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:22:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:22:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash 412610311, now seen corresponding path program 1 times [2022-03-18 01:22:09,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:09,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [921616301] [2022-03-18 01:22:10,211 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:22:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash 296996863, now seen corresponding path program 1 times [2022-03-18 01:22:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:22:10,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294484697] [2022-03-18 01:22:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:10,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:22:10,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:22:10,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821114142] [2022-03-18 01:22:10,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:22:10,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:22:10,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:22:10,221 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 01:22:10,231 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 01:22:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:22:10,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 01:22:10,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:22:10,347 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 01:22:10,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:22:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:22:10,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294484697] [2022-03-18 01:22:10,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:22:10,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821114142] [2022-03-18 01:22:10,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821114142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:10,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:10,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:22:42,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:22:42,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [921616301] [2022-03-18 01:22:42,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [921616301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:22:42,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:22:42,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:22:42,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235331522] [2022-03-18 01:22:42,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:22:42,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:22:42,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:22:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:22:42,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=234, Unknown=11, NotChecked=0, Total=306 [2022-03-18 01:22:42,863 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 01:22:57,140 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 01:22:58,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:23:00,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:23:02,487 WARN L534 Checker$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 01:23:04,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:23:06,574 WARN L534 Checker$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 01:23:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:23:06,610 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-03-18 01:23:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:23:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.2) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-03-18 01:23:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:23:06,611 INFO L225 Difference]: With dead ends: 51 [2022-03-18 01:23:06,611 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 01:23:06,612 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 46.7s TimeCoverageRelationStatistics Valid=89, Invalid=360, Unknown=13, NotChecked=0, Total=462 [2022-03-18 01:23:06,613 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 25 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:23:06,613 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 172 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 96 Invalid, 4 Unknown, 85 Unchecked, 9.4s Time] [2022-03-18 01:23:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 01:23:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-18 01:23:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 01:23:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-03-18 01:23:06,626 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 28 [2022-03-18 01:23:06,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:23:06,626 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-03-18 01:23:06,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.2) internal successors, (18), 10 states have internal predecessors, (18), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 01:23:06,627 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-03-18 01:23:06,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 01:23:06,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:23:06,628 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] [2022-03-18 01:23:06,649 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 01:23:06,839 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 01:23:06,839 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:23:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:23:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1040346008, now seen corresponding path program 1 times [2022-03-18 01:23:06,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:23:06,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689934295] [2022-03-18 01:23:07,355 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 01:23:07,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1909801776, now seen corresponding path program 1 times [2022-03-18 01:23:07,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:23:07,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790381285] [2022-03-18 01:23:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:23:07,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:23:07,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:23:07,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993777480] [2022-03-18 01:23:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:23:07,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:23:07,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:23:07,368 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 01:23:07,369 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 01:23:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:23:07,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 01:23:07,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:23:07,472 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 01:23:07,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:23:07,564 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 01:23:07,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:23:07,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790381285] [2022-03-18 01:23:07,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:23:07,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993777480] [2022-03-18 01:23:07,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993777480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:23:07,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:23:07,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-18 01:23:44,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:23:44,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689934295] [2022-03-18 01:23:44,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689934295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:23:44,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:23:44,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 01:23:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291270026] [2022-03-18 01:23:44,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:23:44,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 01:23:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:23:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 01:23:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-03-18 01:23:44,083 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 01:23:58,387 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 01:23:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:23:58,547 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-03-18 01:23:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:23:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2022-03-18 01:23:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:23:58,549 INFO L225 Difference]: With dead ends: 48 [2022-03-18 01:23:58,549 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 01:23:58,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 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 01:23:58,550 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:23:58,550 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 117 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 80 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-03-18 01:23:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 01:23:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 01:23:58,551 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 01:23:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 01:23:58,551 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2022-03-18 01:23:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:23:58,552 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 01:23:58,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 13 states have internal predecessors, (25), 3 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 01:23:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 01:23:58,552 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 01:23:58,555 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 01:23:58,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 01:23:58,755 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 01:23:58,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 01:24:29,628 WARN L232 SmtUtils]: Spent 20.52s 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 01:24:45,760 WARN L232 SmtUtils]: Spent 16.07s 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 01:24:45,791 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-18 01:24:45,791 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-18 01:24:45,791 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-18 01:24:45,791 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2022-03-18 01:24:45,791 INFO L882 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-03-18 01:24:45,791 INFO L882 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-03-18 01:24:45,791 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-03-18 01:24:45,791 INFO L878 garLoopResultBuilder]: At program point L32(lines 29 41) 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 01:24:45,792 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 01:24:45,792 INFO L878 garLoopResultBuilder]: At program point L30(line 30) 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 01:24:45,792 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 48) the Hoare annotation is: true [2022-03-18 01:24:45,792 INFO L878 garLoopResultBuilder]: At program point L30-1(line 30) 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 01:24:45,792 INFO L878 garLoopResultBuilder]: At program point L29-2(lines 29 41) 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 01:24:45,792 INFO L878 garLoopResultBuilder]: At program point L29-3(lines 29 41) 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 01:24:45,792 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 48) the Hoare annotation is: true [2022-03-18 01:24:45,792 INFO L885 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: true [2022-03-18 01:24:45,792 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 48) the Hoare annotation is: true [2022-03-18 01:24:45,793 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) [2022-03-18 01:24:45,793 INFO L878 garLoopResultBuilder]: At program point L43(line 43) 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 01:24:45,793 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 01:24:45,793 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 01:24:45,793 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 01:24:45,793 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 01:24:45,793 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 01:24:45,793 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 01:24:45,793 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 01:24:45,793 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-18 01:24:45,794 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 01:24:45,794 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 01:24:45,794 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 01:24:45,794 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 01:24:45,794 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 01:24:45,797 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 01:24:45,798 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 01:24:45,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 01:24:45 BoogieIcfgContainer [2022-03-18 01:24:45,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 01:24:45,810 INFO L158 Benchmark]: Toolchain (without parser) took 158625.88ms. Allocated memory was 173.0MB in the beginning and 216.0MB in the end (delta: 43.0MB). Free memory was 126.7MB in the beginning and 151.3MB in the end (delta: -24.6MB). Peak memory consumption was 19.5MB. Max. memory is 8.0GB. [2022-03-18 01:24:45,811 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 173.0MB. Free memory is still 143.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 01:24:45,811 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.47ms. Allocated memory is still 173.0MB. Free memory was 126.5MB in the beginning and 153.5MB in the end (delta: -26.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 01:24:45,811 INFO L158 Benchmark]: Boogie Preprocessor took 20.65ms. Allocated memory is still 173.0MB. Free memory was 153.5MB in the beginning and 152.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 01:24:45,811 INFO L158 Benchmark]: RCFGBuilder took 294.67ms. Allocated memory is still 173.0MB. Free memory was 152.1MB in the beginning and 142.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 01:24:45,812 INFO L158 Benchmark]: TraceAbstraction took 158110.03ms. Allocated memory was 173.0MB in the beginning and 216.0MB in the end (delta: 43.0MB). Free memory was 141.6MB in the beginning and 151.3MB in the end (delta: -9.7MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. [2022-03-18 01:24:45,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 173.0MB. Free memory is still 143.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.47ms. Allocated memory is still 173.0MB. Free memory was 126.5MB in the beginning and 153.5MB in the end (delta: -26.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.65ms. Allocated memory is still 173.0MB. Free memory was 153.5MB in the beginning and 152.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 294.67ms. Allocated memory is still 173.0MB. Free memory was 152.1MB in the beginning and 142.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 158110.03ms. Allocated memory was 173.0MB in the beginning and 216.0MB in the end (delta: 43.0MB). Free memory was 141.6MB in the beginning and 151.3MB in the end (delta: -9.7MB). Peak memory consumption was 34.6MB. 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, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 158.0s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 38.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 47.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 110 SdHoareTripleChecker+Valid, 9.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 90 mSDsluCounter, 537 SdHoareTripleChecker+Invalid, 9.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 125 IncrementalHoareTripleChecker+Unchecked, 398 mSDsCounter, 92 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 318 IncrementalHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 92 mSolverCounterUnsat, 139 mSDtfsCounter, 318 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 110 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 97.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred 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: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 25 LocationsWithAnnotation, 127 PreInvPairs, 182 NumberOfFragments, 287 HoareAnnotationTreeSize, 127 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 25 FomulaSimplificationsInter, 1707 FormulaSimplificationTreeSizeReductionInter, 47.0s 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: 29]: 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: 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 01:24:45,844 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...