/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 05:18:48,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 05:18:48,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 05:18:48,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 05:18:48,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 05:18:48,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 05:18:48,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 05:18:48,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 05:18:48,902 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 05:18:48,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 05:18:48,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 05:18:48,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 05:18:48,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 05:18:48,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 05:18:48,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 05:18:48,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 05:18:48,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 05:18:48,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 05:18:48,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 05:18:48,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 05:18:48,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 05:18:48,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 05:18:48,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 05:18:48,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:18:48,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 05:18:48,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 05:18:48,906 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 05:18:48,906 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 05:18:48,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 05:18:48,906 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 05:18:48,906 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 05:18:49,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 05:18:49,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 05:18:49,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 05:18:49,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 05:18:49,092 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 05:18:49,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2022-03-18 05:18:49,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94d3e2114/90ef06f80c494b329659b1055873c712/FLAGe8c8aab54 [2022-03-18 05:18:49,526 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 05:18:49,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c [2022-03-18 05:18:49,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94d3e2114/90ef06f80c494b329659b1055873c712/FLAGe8c8aab54 [2022-03-18 05:18:49,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94d3e2114/90ef06f80c494b329659b1055873c712 [2022-03-18 05:18:49,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 05:18:49,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 05:18:49,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 05:18:49,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 05:18:49,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 05:18:49,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e3d1bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49, skipping insertion in model container [2022-03-18 05:18:49,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 05:18:49,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 05:18:49,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c[520,533] [2022-03-18 05:18:49,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:18:49,740 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 05:18:49,750 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound2.c[520,533] [2022-03-18 05:18:49,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 05:18:49,775 INFO L208 MainTranslator]: Completed translation [2022-03-18 05:18:49,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49 WrapperNode [2022-03-18 05:18:49,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 05:18:49,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 05:18:49,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 05:18:49,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 05:18:49,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 05:18:49,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 05:18:49,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 05:18:49,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 05:18:49,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (1/1) ... [2022-03-18 05:18:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 05:18:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:18:49,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 05:18:49,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 05:18:49,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 05:18:49,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 05:18:49,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 05:18:49,886 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 05:18:49,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 05:18:49,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 05:18:49,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 05:18:49,887 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 05:18:49,887 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 05:18:49,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 05:18:49,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 05:18:49,887 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 05:18:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 05:18:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 05:18:49,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 05:18:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 05:18:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 05:18:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 05:18:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 05:18:49,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 05:18:49,935 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 05:18:49,936 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 05:18:50,035 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 05:18:50,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 05:18:50,039 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 05:18:50,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:18:50 BoogieIcfgContainer [2022-03-18 05:18:50,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 05:18:50,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 05:18:50,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 05:18:50,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 05:18:50,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 05:18:49" (1/3) ... [2022-03-18 05:18:50,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd5a01c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:18:50, skipping insertion in model container [2022-03-18 05:18:50,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 05:18:49" (2/3) ... [2022-03-18 05:18:50,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd5a01c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 05:18:50, skipping insertion in model container [2022-03-18 05:18:50,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 05:18:50" (3/3) ... [2022-03-18 05:18:50,063 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound2.c [2022-03-18 05:18:50,066 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 05:18:50,066 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 05:18:50,111 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 05:18:50,120 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 05:18:50,120 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 05:18:50,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 05:18:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 05:18:50,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:18:50,138 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:18:50,139 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:18:50,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:18:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-03-18 05:18:50,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:50,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [137612351] [2022-03-18 05:18:50,162 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:18:50,162 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times [2022-03-18 05:18:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:18:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41809316] [2022-03-18 05:18:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:18:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:18:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:18:50,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:18:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:18:50,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:18:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:18:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:18:50,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:18:50,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41809316] [2022-03-18 05:18:50,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41809316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:50,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:50,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 05:18:50,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:18:50,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [137612351] [2022-03-18 05:18:50,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [137612351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:50,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:50,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 05:18:50,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874898027] [2022-03-18 05:18:50,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:18:50,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 05:18:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 05:18:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 05:18:50,372 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:18:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:18:50,443 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-03-18 05:18:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 05:18:50,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 05:18:50,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:18:50,452 INFO L225 Difference]: With dead ends: 53 [2022-03-18 05:18:50,452 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 05:18:50,455 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 05:18:50,459 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:18:50,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:18:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 05:18:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-18 05:18:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 05:18:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-03-18 05:18:50,490 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-03-18 05:18:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:18:50,490 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-03-18 05:18:50,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:18:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-03-18 05:18:50,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 05:18:50,492 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:18:50,492 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:18:50,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 05:18:50,493 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:18:50,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:18:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-03-18 05:18:50,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:50,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354757405] [2022-03-18 05:18:50,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:18:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times [2022-03-18 05:18:50,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:18:50,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469856911] [2022-03-18 05:18:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:18:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:18:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:18:50,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 05:18:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:18:50,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 05:18:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:18:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:18:50,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:18:50,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469856911] [2022-03-18 05:18:50,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469856911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:50,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:50,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:18:50,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:18:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354757405] [2022-03-18 05:18:50,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354757405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:50,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:50,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 05:18:50,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693701638] [2022-03-18 05:18:50,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:18:50,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 05:18:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 05:18:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:18:50,626 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:18:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:18:50,812 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-18 05:18:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 05:18:50,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-18 05:18:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:18:50,813 INFO L225 Difference]: With dead ends: 40 [2022-03-18 05:18:50,813 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 05:18:50,814 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 05:18:50,815 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 05:18:50,815 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 05:18:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 05:18:50,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-03-18 05:18:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 05:18:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-03-18 05:18:50,824 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-03-18 05:18:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:18:50,824 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-03-18 05:18:50,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-18 05:18:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-03-18 05:18:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 05:18:50,825 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:18:50,825 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:18:50,825 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 05:18:50,826 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:18:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:18:50,826 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-03-18 05:18:50,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:50,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302776644] [2022-03-18 05:18:50,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:18:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 2 times [2022-03-18 05:18:50,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:18:50,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185567889] [2022-03-18 05:18:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:18:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:18:50,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:18:50,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185199966] [2022-03-18 05:18:50,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 05:18:50,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:18:50,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:18:50,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 05:18:50,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 05:18:50,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 05:18:50,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 05:18:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 05:18:50,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:18:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:18:50,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:18:50,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:18:50,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185567889] [2022-03-18 05:18:50,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:18:50,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185199966] [2022-03-18 05:18:50,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185199966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:50,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:50,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:18:50,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:18:50,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302776644] [2022-03-18 05:18:50,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302776644] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:50,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:50,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:18:50,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786630737] [2022-03-18 05:18:50,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:18:50,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:18:50,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:50,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:18:50,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:18:50,961 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 05:18:50,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:18:50,993 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-03-18 05:18:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 05:18:50,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 05:18:50,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:18:50,994 INFO L225 Difference]: With dead ends: 44 [2022-03-18 05:18:50,994 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 05:18:50,995 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:18:50,996 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:18:50,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:18:50,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 05:18:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-18 05:18:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 05:18:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-03-18 05:18:51,005 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-03-18 05:18:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:18:51,005 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-03-18 05:18:51,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 05:18:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-03-18 05:18:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 05:18:51,006 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:18:51,006 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:18:51,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 05:18:51,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:18:51,220 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:18:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:18:51,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2022-03-18 05:18:51,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:51,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1711526901] [2022-03-18 05:18:51,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 05:18:51,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 2 times [2022-03-18 05:18:51,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:18:51,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891867223] [2022-03-18 05:18:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:18:51,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:18:51,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:18:51,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195479306] [2022-03-18 05:18:51,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 05:18:51,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:18:51,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:18:51,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 05:18:51,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 05:18:51,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 05:18:51,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 05:18:51,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 05:18:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:18:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 05:18:51,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:18:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:18:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891867223] [2022-03-18 05:18:51,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:18:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195479306] [2022-03-18 05:18:51,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195479306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:51,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:51,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:18:51,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:18:51,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1711526901] [2022-03-18 05:18:51,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1711526901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:51,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:51,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:18:51,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304243310] [2022-03-18 05:18:51,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:18:51,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 05:18:51,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 05:18:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 05:18:51,348 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 05:18:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:18:51,393 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-03-18 05:18:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 05:18:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-18 05:18:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:18:51,400 INFO L225 Difference]: With dead ends: 48 [2022-03-18 05:18:51,400 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 05:18:51,400 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 05:18:51,403 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 05:18:51,403 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 05:18:51,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 05:18:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 05:18:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 05:18:51,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-03-18 05:18:51,421 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2022-03-18 05:18:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:18:51,422 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-03-18 05:18:51,422 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 05:18:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-03-18 05:18:51,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 05:18:51,423 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:18:51,423 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:18:51,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 05:18:51,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 05:18:51,650 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:18:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:18:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2022-03-18 05:18:51,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:18:51,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822503775] [2022-03-18 05:18:52,156 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 05:18:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1589942244, now seen corresponding path program 1 times [2022-03-18 05:18:52,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:18:52,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669379424] [2022-03-18 05:18:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:18:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:18:52,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:18:52,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068555259] [2022-03-18 05:18:52,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:18:52,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:18:52,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:18:52,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 05:18:52,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 05:18:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:18:52,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 05:18:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:18:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 05:18:52,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 05:18:52,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:18:52,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669379424] [2022-03-18 05:18:52,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:18:52,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068555259] [2022-03-18 05:18:52,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068555259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:18:52,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:18:52,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 05:19:26,718 WARN L232 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 27 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:19:26,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:19:26,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822503775] [2022-03-18 05:19:26,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822503775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:19:26,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:19:26,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 05:19:26,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22086486] [2022-03-18 05:19:26,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:19:26,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 05:19:26,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:19:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 05:19:26,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=234, Unknown=11, NotChecked=0, Total=306 [2022-03-18 05:19:26,795 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 05:19:40,957 WARN L232 SmtUtils]: Spent 10.04s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:19:43,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:19:45,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:19:47,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 05:19:47,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:19:47,525 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-03-18 05:19:47,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 05:19:47,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-03-18 05:19:47,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:19:47,527 INFO L225 Difference]: With dead ends: 57 [2022-03-18 05:19:47,527 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 05:19:47,527 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=89, Invalid=360, Unknown=13, NotChecked=0, Total=462 [2022-03-18 05:19:47,528 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-18 05:19:47,528 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 263 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 3 Unknown, 41 Unchecked, 6.5s Time] [2022-03-18 05:19:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 05:19:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-18 05:19:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 05:19:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-03-18 05:19:47,538 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 34 [2022-03-18 05:19:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:19:47,538 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-03-18 05:19:47,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 05:19:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-03-18 05:19:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 05:19:47,540 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 05:19:47,540 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 05:19:47,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 05:19:47,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:19:47,741 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 05:19:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 05:19:47,742 INFO L85 PathProgramCache]: Analyzing trace with hash -985423115, now seen corresponding path program 1 times [2022-03-18 05:19:47,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 05:19:47,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610180231] [2022-03-18 05:19:48,185 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 05:19:48,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1515990761, now seen corresponding path program 1 times [2022-03-18 05:19:48,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 05:19:48,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655012673] [2022-03-18 05:19:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:19:48,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 05:19:48,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 05:19:48,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254563985] [2022-03-18 05:19:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 05:19:48,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:19:48,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 05:19:48,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 05:19:48,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 05:19:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 05:19:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 05:19:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 05:19:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 05:19:48,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 05:19:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-18 05:19:48,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 05:19:48,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655012673] [2022-03-18 05:19:48,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 05:19:48,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254563985] [2022-03-18 05:19:48,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254563985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 05:19:48,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 05:19:48,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-03-18 05:20:25,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 05:20:25,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610180231] [2022-03-18 05:20:25,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610180231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 05:20:25,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 05:20:25,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 05:20:25,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291689951] [2022-03-18 05:20:25,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 05:20:25,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 05:20:25,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 05:20:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 05:20:25,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-03-18 05:20:25,043 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 05:20:39,492 WARN L232 SmtUtils]: Spent 10.12s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 05:20:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 05:20:39,693 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-03-18 05:20:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 05:20:39,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-18 05:20:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 05:20:39,695 INFO L225 Difference]: With dead ends: 54 [2022-03-18 05:20:39,695 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 05:20:39,695 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=119, Invalid=466, Unknown=15, NotChecked=0, Total=600 [2022-03-18 05:20:39,696 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 05:20:39,696 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 185 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 107 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-03-18 05:20:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 05:20:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 05:20:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 05:20:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 05:20:39,697 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2022-03-18 05:20:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 05:20:39,697 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 05:20:39,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 05:20:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 05:20:39,697 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 05:20:39,702 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 05:20:39,723 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 05:20:39,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 05:20:39,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 05:20:46,165 WARN L232 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 44 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:21:00,302 WARN L232 SmtUtils]: Spent 10.07s 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 05:21:17,216 WARN L232 SmtUtils]: Spent 16.89s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:21:36,238 WARN L232 SmtUtils]: Spent 19.02s on a formula simplification. DAG size of input: 61 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-03-18 05:21:36,281 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-03-18 05:21:36,281 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-03-18 05:21:36,281 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-03-18 05:21:36,281 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-03-18 05:21:36,282 INFO L885 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: true [2022-03-18 05:21:36,282 INFO L885 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: true [2022-03-18 05:21:36,282 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: true [2022-03-18 05:21:36,282 INFO L878 garLoopResultBuilder]: At program point L33(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:21:36,282 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:21:36,282 INFO L878 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:21:36,282 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-03-18 05:21:36,282 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-03-18 05:21:36,282 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-03-18 05:21:36,282 INFO L878 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:21:36,282 INFO L878 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:21:36,282 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-18 05:21:36,282 INFO L878 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse1 (* main_~a~0 2))) (let ((.cse0 (= main_~t~0 (+ .cse1 1)))) (or (and (= main_~t~0 1) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) .cse0) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (= (+ .cse1 (* main_~a~0 main_~a~0) 1) main_~s~0) .cse0)))) [2022-03-18 05:21:36,283 INFO L878 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)) [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-03-18 05:21:36,283 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 05:21:36,283 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:21:36,283 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:21:36,284 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) [2022-03-18 05:21:36,284 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-03-18 05:21:36,286 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 05:21:36,286 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 05:21:36,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 05:21:36 BoogieIcfgContainer [2022-03-18 05:21:36,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 05:21:36,300 INFO L158 Benchmark]: Toolchain (without parser) took 166756.13ms. Allocated memory was 192.9MB in the beginning and 305.1MB in the end (delta: 112.2MB). Free memory was 136.8MB in the beginning and 132.0MB in the end (delta: 4.7MB). Peak memory consumption was 116.1MB. Max. memory is 8.0GB. [2022-03-18 05:21:36,300 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 192.9MB. Free memory is still 153.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 05:21:36,300 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.13ms. Allocated memory was 192.9MB in the beginning and 305.1MB in the end (delta: 112.2MB). Free memory was 136.6MB in the beginning and 275.8MB in the end (delta: -139.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 05:21:36,301 INFO L158 Benchmark]: Boogie Preprocessor took 44.55ms. Allocated memory is still 305.1MB. Free memory was 275.8MB in the beginning and 274.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 05:21:36,301 INFO L158 Benchmark]: RCFGBuilder took 203.90ms. Allocated memory is still 305.1MB. Free memory was 274.3MB in the beginning and 263.3MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 05:21:36,301 INFO L158 Benchmark]: TraceAbstraction took 166257.53ms. Allocated memory is still 305.1MB. Free memory was 262.8MB in the beginning and 132.0MB in the end (delta: 130.7MB). Peak memory consumption was 130.7MB. Max. memory is 8.0GB. [2022-03-18 05:21:36,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 192.9MB. Free memory is still 153.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.13ms. Allocated memory was 192.9MB in the beginning and 305.1MB in the end (delta: 112.2MB). Free memory was 136.6MB in the beginning and 275.8MB in the end (delta: -139.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 44.55ms. Allocated memory is still 305.1MB. Free memory was 275.8MB in the beginning and 274.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 203.90ms. Allocated memory is still 305.1MB. Free memory was 274.3MB in the beginning and 263.3MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 166257.53ms. Allocated memory is still 305.1MB. Free memory was 262.8MB in the beginning and 132.0MB in the end (delta: 130.7MB). Peak memory consumption was 130.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 166.2s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 35.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 56.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 85 mSDsluCounter, 752 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 74 IncrementalHoareTripleChecker+Unchecked, 579 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 402 IncrementalHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 173 mSDtfsCounter, 402 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 99.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=5, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 133 PreInvPairs, 191 NumberOfFragments, 293 HoareAnnotationTreeSize, 133 FomulaSimplifications, 72 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 31 FomulaSimplificationsInter, 1707 FormulaSimplificationTreeSizeReductionInter, 56.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((t == 1 && t * 2 + t * t + 1 == s * 4) && t == a * 2 + 1) || ((s <= n + t && a * 2 + a * a + 1 == s) && t == a * 2 + 1) - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: 1 - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: ((!(1 <= \old(cond)) || 1 <= cond) && (\old(cond) == 0 || !(cond == 0))) && (!(\old(cond) == 1) || \old(cond) == cond) RESULT: Ultimate proved your program to be correct! [2022-03-18 05:21:36,325 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...