/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 18:38:23,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:38:23,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:38:23,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 18:38:23,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:38:23,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:38:23,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:38:23,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 18:38:23,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:38:23,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:38:23,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:38:23,995 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:38:23,995 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:38:23,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:38:23,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:38:23,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:38:23,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:38:23,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:38:23,996 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:38:23,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:38:23,996 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:38:23,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:38:23,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:38:23,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:38:23,998 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:38:23,998 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:38:24,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:38:24,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:38:24,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:38:24,235 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:38:24,235 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:38:24,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2022-04-06 18:38:24,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aef3d748/6ad3313872644854876efb52ec33f232/FLAGb28347b77 [2022-04-06 18:38:24,602 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:38:24,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2022-04-06 18:38:24,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aef3d748/6ad3313872644854876efb52ec33f232/FLAGb28347b77 [2022-04-06 18:38:25,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aef3d748/6ad3313872644854876efb52ec33f232 [2022-04-06 18:38:25,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:38:25,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:38:25,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:38:25,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:38:25,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:38:25,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc27d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25, skipping insertion in model container [2022-04-06 18:38:25,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:38:25,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:38:25,173 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_valuebound1.c[520,533] [2022-04-06 18:38:25,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:38:25,200 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:38:25,210 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_valuebound1.c[520,533] [2022-04-06 18:38:25,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:38:25,236 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:38:25,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25 WrapperNode [2022-04-06 18:38:25,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:38:25,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:38:25,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:38:25,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:38:25,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:38:25,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:38:25,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:38:25,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:38:25,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (1/1) ... [2022-04-06 18:38:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:38:25,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:38:25,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 18:38:25,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 18:38:25,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:38:25,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:38:25,335 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:38:25,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 18:38:25,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 18:38:25,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:38:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:38:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:38:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:38:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:38:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 18:38:25,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 18:38:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 18:38:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:38:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:38:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:38:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:38:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:38:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:38:25,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:38:25,384 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:38:25,386 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:38:25,507 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:38:25,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:38:25,511 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:38:25,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:38:25 BoogieIcfgContainer [2022-04-06 18:38:25,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:38:25,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:38:25,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:38:25,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:38:25,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:38:25" (1/3) ... [2022-04-06 18:38:25,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6510f62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:38:25, skipping insertion in model container [2022-04-06 18:38:25,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:38:25" (2/3) ... [2022-04-06 18:38:25,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6510f62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:38:25, skipping insertion in model container [2022-04-06 18:38:25,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:38:25" (3/3) ... [2022-04-06 18:38:25,532 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound1.c [2022-04-06 18:38:25,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:38:25,535 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:38:25,593 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:38:25,598 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 18:38:25,598 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:38:25,610 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) [2022-04-06 18:38:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 18:38:25,622 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:38:25,622 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:38:25,627 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:38:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:38:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-04-06 18:38:25,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:25,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [457308170] [2022-04-06 18:38:25,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:38:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times [2022-04-06 18:38:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:38:25,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283604982] [2022-04-06 18:38:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:38:25,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:38:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:38:25,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:38:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:38:25,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:38:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:38:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:38:25,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:38:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283604982] [2022-04-06 18:38:25,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283604982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:25,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:25,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:38:25,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:38:25,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [457308170] [2022-04-06 18:38:25,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [457308170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:25,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:25,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:38:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464646611] [2022-04-06 18:38:25,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:38:25,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 18:38:25,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 18:38:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 18:38:25,782 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) [2022-04-06 18:38:25,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:38:25,846 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-04-06 18:38:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 18:38:25,849 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 [2022-04-06 18:38:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:38:25,860 INFO L225 Difference]: With dead ends: 53 [2022-04-06 18:38:25,860 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 18:38:25,863 INFO L912 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 [2022-04-06 18:38:25,868 INFO L913 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 [2022-04-06 18:38:25,870 INFO L914 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] [2022-04-06 18:38:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 18:38:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 18:38:25,906 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) [2022-04-06 18:38:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-04-06 18:38:25,909 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-04-06 18:38:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:38:25,909 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-04-06 18:38:25,910 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) [2022-04-06 18:38:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-04-06 18:38:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 18:38:25,911 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:38:25,911 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:38:25,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:38:25,912 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:38:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:38:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-04-06 18:38:25,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:25,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2131392596] [2022-04-06 18:38:25,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:38:25,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times [2022-04-06 18:38:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:38:25,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511170861] [2022-04-06 18:38:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:38:25,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:38:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:38:26,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:38:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:38:26,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:38:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:38:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:38:26,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:38:26,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511170861] [2022-04-06 18:38:26,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511170861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:26,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:26,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:38:26,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:38:26,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2131392596] [2022-04-06 18:38:26,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2131392596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:26,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:26,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 18:38:26,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684121958] [2022-04-06 18:38:26,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:38:26,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 18:38:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 18:38:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:38:26,064 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) [2022-04-06 18:38:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:38:26,285 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-04-06 18:38:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:38:26,285 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 [2022-04-06 18:38:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:38:26,286 INFO L225 Difference]: With dead ends: 40 [2022-04-06 18:38:26,287 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 18:38:26,287 INFO L912 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 [2022-04-06 18:38:26,288 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:38:26,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 18:38:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 18:38:26,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-04-06 18:38:26,297 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) [2022-04-06 18:38:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 18:38:26,298 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-04-06 18:38:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:38:26,298 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 18:38:26,298 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) [2022-04-06 18:38:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 18:38:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 18:38:26,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:38:26,299 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:38:26,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 18:38:26,299 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:38:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:38:26,300 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-04-06 18:38:26,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:26,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1826102843] [2022-04-06 18:38:26,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:38:26,301 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 2 times [2022-04-06 18:38:26,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:38:26,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206826915] [2022-04-06 18:38:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:38:26,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:38:26,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:38:26,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210453403] [2022-04-06 18:38:26,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:38:26,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:38:26,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:38:26,311 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) [2022-04-06 18:38:26,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 18:38:26,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:38:26,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:38:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 18:38:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:38:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:38:26,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:38:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:38:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206826915] [2022-04-06 18:38:26,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:38:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210453403] [2022-04-06 18:38:26,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210453403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:26,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:26,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:38:26,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:38:26,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1826102843] [2022-04-06 18:38:26,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1826102843] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:26,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:26,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:38:26,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632041978] [2022-04-06 18:38:26,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:38:26,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:38:26,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:26,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:38:26,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:38:26,456 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) [2022-04-06 18:38:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:38:26,506 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-04-06 18:38:26,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:38:26,507 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 [2022-04-06 18:38:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:38:26,508 INFO L225 Difference]: With dead ends: 44 [2022-04-06 18:38:26,508 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 18:38:26,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 18:38:26,509 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:38:26,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:38:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 18:38:26,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-04-06 18:38:26,516 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) [2022-04-06 18:38:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-04-06 18:38:26,518 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-04-06 18:38:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:38:26,518 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-04-06 18:38:26,518 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) [2022-04-06 18:38:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-04-06 18:38:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 18:38:26,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:38:26,519 INFO L499 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] [2022-04-06 18:38:26,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 18:38:26,743 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 [2022-04-06 18:38:26,744 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:38:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:38:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2022-04-06 18:38:26,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:26,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787424015] [2022-04-06 18:38:26,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:38:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 2 times [2022-04-06 18:38:26,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:38:26,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710068014] [2022-04-06 18:38:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:38:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:38:26,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:38:26,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020963413] [2022-04-06 18:38:26,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:38:26,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:38:26,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:38:26,756 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) [2022-04-06 18:38:26,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 18:38:26,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:38:26,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:38:26,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 18:38:26,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:38:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 18:38:26,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:38:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:38:26,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710068014] [2022-04-06 18:38:26,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:38:26,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020963413] [2022-04-06 18:38:26,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020963413] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:26,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:26,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:38:26,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:38:26,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787424015] [2022-04-06 18:38:26,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787424015] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:26,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:26,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:38:26,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806835873] [2022-04-06 18:38:26,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:38:26,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:38:26,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:38:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:38:26,885 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) [2022-04-06 18:38:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:38:26,921 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-04-06 18:38:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:38:26,922 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 [2022-04-06 18:38:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:38:26,924 INFO L225 Difference]: With dead ends: 48 [2022-04-06 18:38:26,924 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 18:38:26,928 INFO L912 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 [2022-04-06 18:38:26,932 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 18:38:26,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 106 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 18:38:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 18:38:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 18:38:26,943 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) [2022-04-06 18:38:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-04-06 18:38:26,944 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2022-04-06 18:38:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:38:26,944 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-04-06 18:38:26,945 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) [2022-04-06 18:38:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-04-06 18:38:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 18:38:26,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:38:26,945 INFO L499 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] [2022-04-06 18:38:26,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 18:38:27,146 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 [2022-04-06 18:38:27,146 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:38:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:38:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2022-04-06 18:38:27,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:38:27,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1687849304] [2022-04-06 18:38:30,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:38:30,126 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 18:38:30,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1589942244, now seen corresponding path program 1 times [2022-04-06 18:38:30,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:38:30,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984583002] [2022-04-06 18:38:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:38:30,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:38:30,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:38:30,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133128509] [2022-04-06 18:38:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:38:30,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:38:30,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:38:30,149 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) [2022-04-06 18:38:30,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 18:38:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:38:30,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 18:38:30,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:38:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:38:30,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:38:30,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:38:30,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984583002] [2022-04-06 18:38:30,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:38:30,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133128509] [2022-04-06 18:38:30,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133128509] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:38:30,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:38:30,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:39:11,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:39:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1687849304] [2022-04-06 18:39:11,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1687849304] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:39:11,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:39:11,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:39:11,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148904420] [2022-04-06 18:39:11,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:39:11,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:39:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:39:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:39:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=455, Unknown=14, NotChecked=0, Total=552 [2022-04-06 18:39:11,252 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 18:39:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:39:15,756 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-04-06 18:39:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 18:39:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-04-06 18:39:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:39:15,757 INFO L225 Difference]: With dead ends: 51 [2022-04-06 18:39:15,757 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 18:39:15,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=118, Invalid=680, Unknown=14, NotChecked=0, Total=812 [2022-04-06 18:39:15,758 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:39:15,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 180 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2022-04-06 18:39:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 18:39:15,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 18:39:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 18:39:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-04-06 18:39:15,770 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 34 [2022-04-06 18:39:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:39:15,770 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-04-06 18:39:15,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 18:39:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-04-06 18:39:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 18:39:15,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:39:15,771 INFO L499 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] [2022-04-06 18:39:15,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 18:39:15,971 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 [2022-04-06 18:39:15,972 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:39:15,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:39:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash -985423115, now seen corresponding path program 1 times [2022-04-06 18:39:15,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:39:15,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045313280] [2022-04-06 18:39:17,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:39:17,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-06 18:39:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1515990761, now seen corresponding path program 1 times [2022-04-06 18:39:17,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:39:17,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231516604] [2022-04-06 18:39:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:39:17,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:39:17,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:39:17,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569618537] [2022-04-06 18:39:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:39:17,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:39:17,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:39:17,086 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) [2022-04-06 18:39:17,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 18:39:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:39:17,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 18:39:17,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:39:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 18:39:17,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:39:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 18:39:17,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:39:17,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231516604] [2022-04-06 18:39:17,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:39:17,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569618537] [2022-04-06 18:39:17,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569618537] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 18:39:17,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 18:39:17,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 18:39:53,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:39:53,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045313280] [2022-04-06 18:39:53,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045313280] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:39:53,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:39:53,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:39:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130586253] [2022-04-06 18:39:53,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:39:53,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:39:53,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:39:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:39:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=316, Unknown=13, NotChecked=0, Total=420 [2022-04-06 18:39:53,679 INFO L87 Difference]: Start difference. First operand 48 states and 51 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) [2022-04-06 18:40:07,972 WARN L232 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 23 DAG size of output: 19 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 18:40:08,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:40:08,159 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-04-06 18:40:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:40:08,160 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 [2022-04-06 18:40:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:40:08,160 INFO L225 Difference]: With dead ends: 52 [2022-04-06 18:40:08,160 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 18:40:08,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=119, Invalid=466, Unknown=15, NotChecked=0, Total=600 [2022-04-06 18:40:08,162 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:40:08,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 187 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 160 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-04-06 18:40:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 18:40:08,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 18:40:08,163 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) [2022-04-06 18:40:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 18:40:08,163 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2022-04-06 18:40:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:40:08,163 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 18:40:08,163 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) [2022-04-06 18:40:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 18:40:08,164 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 18:40:08,165 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:40:08,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 18:40:08,375 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 [2022-04-06 18:40:08,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 18:40:43,114 WARN L232 SmtUtils]: Spent 34.58s on a formula simplification. DAG size of input: 262 DAG size of output: 134 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:41:16,522 WARN L232 SmtUtils]: Spent 29.10s on a formula simplification. DAG size of input: 277 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:41:53,517 WARN L232 SmtUtils]: Spent 36.86s on a formula simplification. DAG size of input: 276 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:42:31,476 WARN L232 SmtUtils]: Spent 37.93s on a formula simplification. DAG size of input: 276 DAG size of output: 17 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 18:42:32,030 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-04-06 18:42:32,030 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-04-06 18:42:32,030 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-04-06 18:42:32,031 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-04-06 18:42:32,031 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 18:42:32,031 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 18:42:32,031 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 18:42:32,031 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))) [2022-04-06 18:42:32,031 INFO L878 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse1 (* main_~a~0 2))) (and (or (let ((.cse0 (div (+ (- 1) main_~a~0) 2))) (and (< .cse0 1) (<= 0 .cse0) (= (mod (+ main_~a~0 1) 2) 0))) (= main_~t~0 1)) (<= main_~s~0 (+ main_~n~0 main_~t~0)) (= (+ .cse1 (* main_~a~0 main_~a~0) 1) main_~s~0) (= main_~t~0 (+ .cse1 1)))) [2022-04-06 18:42:32,031 INFO L878 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (or (let ((.cse0 (* main_~a~0 2))) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (= (+ .cse0 (* main_~a~0 main_~a~0) 1) main_~s~0) (= main_~t~0 (+ .cse0 1)))) (and (= main_~t~0 1) (exists ((v_main_~n~0_BEFORE_RETURN_1 Int) (v_main_~t~0_21 Int) (v_main_~s~0_21 Int) (v_main_~a~0_21 Int) (v_main_~s~0_BEFORE_RETURN_1 Int) (v___VERIFIER_assert_~cond_BEFORE_RETURN_1 Int)) (let ((.cse11 (= v___VERIFIER_assert_~cond_BEFORE_RETURN_1 1)) (.cse10 (= v___VERIFIER_assert_~cond_BEFORE_RETURN_1 0))) (and (<= 0 v_main_~n~0_BEFORE_RETURN_1) (let ((.cse1 (= 0 v_main_~a~0_21)) (.cse4 (= v_main_~t~0_21 1)) (.cse5 (= v_main_~s~0_21 v_main_~s~0_BEFORE_RETURN_1)) (.cse3 (= (* v_main_~s~0_21 4) 4)) (.cse2 (<= v_main_~s~0_21 v_main_~n~0_BEFORE_RETURN_1))) (or (and .cse1 (or (not .cse2) (not .cse3)) .cse4 .cse5) (and .cse1 .cse4 .cse5) (let ((.cse6 (div (+ (- 1) v_main_~a~0_21) 2))) (and (<= 0 .cse6) (= v_main_~t~0_21 (+ 3 (* 4 .cse6))) .cse3 (forall ((v_itHalf_1 Int)) (or (not (<= v_itHalf_1 (div (+ (- 1) v_main_~a~0_21) 2))) (and (<= (+ v_main_~s~0_21 (* v_itHalf_1 4) (* (* v_itHalf_1 v_itHalf_1) 4)) v_main_~n~0_BEFORE_RETURN_1) (= v_main_~s~0_21 1)) (not (<= 1 v_itHalf_1)))) (= (+ v_main_~s~0_21 (* (* .cse6 .cse6) 4) 3 (* 8 .cse6)) v_main_~s~0_BEFORE_RETURN_1) .cse2 (= (mod (+ 1 v_main_~a~0_21) 2) 0))) (let ((.cse7 (div v_main_~a~0_21 2))) (let ((.cse8 (* .cse7 4))) (and (< 0 .cse7) (= v_main_~t~0_21 (+ .cse8 1)) (forall ((v_itHalf_1 Int)) (or (not (<= 0 v_itHalf_1)) (and (<= (+ v_main_~s~0_21 3 (* v_itHalf_1 8) (* (* v_itHalf_1 v_itHalf_1) 4)) v_main_~n~0_BEFORE_RETURN_1) (= v_main_~s~0_21 1)) (not (<= (+ v_itHalf_1 1) (div v_main_~a~0_21 2))))) (= (+ (* (* .cse7 .cse7) 4) .cse8 v_main_~s~0_21) v_main_~s~0_BEFORE_RETURN_1) (= (mod v_main_~a~0_21 2) 0) .cse2))))) (<= 1 v_main_~s~0_21) (<= v_main_~n~0_BEFORE_RETURN_1 1) (let ((.cse9 (= main_~t~0 (+ (* main_~a~0 2) 1)))) (or (and (not .cse9) .cse10) (and .cse11 .cse9))) (let ((.cse12 (= v_main_~t~0_21 (+ (* 2 v_main_~a~0_21) 1)))) (or (and .cse12 .cse11) (and .cse10 (not .cse12))))))) (= (+ (* main_~t~0 2) (* main_~t~0 main_~t~0) 1) (* main_~s~0 4)))) [2022-04-06 18:42:32,031 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-04-06 18:42:32,031 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-04-06 18:42:32,031 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-04-06 18:42:32,032 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))) [2022-04-06 18:42:32,032 INFO L878 garLoopResultBuilder]: At program point L32(line 32) 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)))) [2022-04-06 18:42:32,032 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-04-06 18:42:32,032 INFO L878 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (<= main_~s~0 (+ main_~n~0 main_~t~0)) (= (+ .cse0 (* main_~a~0 main_~a~0) 1) main_~s~0) (= main_~t~0 (+ .cse0 1)))) [2022-04-06 18:42:32,032 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))) [2022-04-06 18:42:32,032 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-04-06 18:42:32,032 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~n~0 1)) [2022-04-06 18:42:32,032 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)) [2022-04-06 18:42:32,032 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 18:42:32,032 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|)) [2022-04-06 18:42:32,032 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 18:42:32,032 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 18:42:32,032 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 18:42:32,032 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 18:42:32,032 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 18:42:32,033 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: (or (not (<= main_~n~0 1)) (exists ((v_main_~t~0_21 Int) (v_main_~s~0_21 Int) (v_main_~a~0_21 Int)) (and (let ((.cse5 (= 0 v_main_~a~0_21)) (.cse0 (<= v_main_~s~0_21 main_~n~0)) (.cse4 (= (* v_main_~s~0_21 4) 4)) (.cse6 (= v_main_~s~0_21 main_~s~0)) (.cse7 (= v_main_~t~0_21 1))) (or (let ((.cse1 (div v_main_~a~0_21 2))) (let ((.cse2 (* .cse1 4))) (and .cse0 (< 0 .cse1) (= v_main_~t~0_21 (+ .cse2 1)) (forall ((v_itHalf_1 Int)) (or (and (<= (+ v_main_~s~0_21 3 (* v_itHalf_1 8) (* (* v_itHalf_1 v_itHalf_1) 4)) main_~n~0) (= v_main_~s~0_21 1)) (not (<= 0 v_itHalf_1)) (not (<= (+ v_itHalf_1 1) (div v_main_~a~0_21 2))))) (= main_~s~0 (+ (* (* .cse1 .cse1) 4) .cse2 v_main_~s~0_21)) (= (mod v_main_~a~0_21 2) 0)))) (let ((.cse3 (div (+ (- 1) v_main_~a~0_21) 2))) (and .cse0 (<= 0 .cse3) (= v_main_~t~0_21 (+ 3 (* 4 .cse3))) .cse4 (forall ((v_itHalf_1 Int)) (or (not (<= v_itHalf_1 (div (+ (- 1) v_main_~a~0_21) 2))) (not (<= 1 v_itHalf_1)) (and (= v_main_~s~0_21 1) (<= (+ v_main_~s~0_21 (* v_itHalf_1 4) (* (* v_itHalf_1 v_itHalf_1) 4)) main_~n~0)))) (= (+ v_main_~s~0_21 (* (* .cse3 .cse3) 4) 3 (* 8 .cse3)) main_~s~0) (= (mod (+ 1 v_main_~a~0_21) 2) 0))) (and .cse5 .cse6 .cse7) (and .cse5 (or (not .cse0) (not .cse4)) .cse6 .cse7))) (let ((.cse8 (= v_main_~t~0_21 (+ (* 2 v_main_~a~0_21) 1)))) (or (and .cse8 (= |__VERIFIER_assert_#in~cond| 1)) (and (= |__VERIFIER_assert_#in~cond| 0) (not .cse8)))) (<= 1 v_main_~s~0_21))) (forall ((v_main_~t~0_21 Int) (v_main_~s~0_21 Int) (v_main_~a~0_21 Int)) (or (let ((.cse14 (<= v_main_~s~0_21 main_~n~0))) (let ((.cse11 (= (* v_main_~s~0_21 4) 4)) (.cse12 (not (= v_main_~t~0_21 1))) (.cse13 (not (= v_main_~s~0_21 main_~s~0))) (.cse15 (not (= 0 v_main_~a~0_21))) (.cse9 (not .cse14))) (and (let ((.cse10 (div (+ (- 1) v_main_~a~0_21) 2))) (or .cse9 (not (= v_main_~t~0_21 (+ 3 (* 4 .cse10)))) (not (= (mod (+ 1 v_main_~a~0_21) 2) 0)) (not .cse11) (exists ((v_itHalf_1 Int)) (and (or (not (= v_main_~s~0_21 1)) (not (<= (+ v_main_~s~0_21 (* v_itHalf_1 4) (* (* v_itHalf_1 v_itHalf_1) 4)) main_~n~0))) (<= 1 v_itHalf_1) (<= v_itHalf_1 (div (+ (- 1) v_main_~a~0_21) 2)))) (not (= (+ v_main_~s~0_21 (* (* .cse10 .cse10) 4) 3 (* 8 .cse10)) main_~s~0)) (not (<= 0 .cse10)))) (or .cse12 .cse13 (and .cse14 .cse11) .cse15) (or .cse12 .cse13 .cse15) (let ((.cse17 (div v_main_~a~0_21 2))) (let ((.cse16 (* .cse17 4))) (or .cse9 (not (= v_main_~t~0_21 (+ .cse16 1))) (exists ((v_itHalf_1 Int)) (and (<= (+ v_itHalf_1 1) (div v_main_~a~0_21 2)) (or (not (<= (+ v_main_~s~0_21 3 (* v_itHalf_1 8) (* (* v_itHalf_1 v_itHalf_1) 4)) main_~n~0)) (not (= v_main_~s~0_21 1))) (<= 0 v_itHalf_1))) (not (= (mod v_main_~a~0_21 2) 0)) (not (= main_~s~0 (+ (* (* .cse17 .cse17) 4) .cse16 v_main_~s~0_21))) (not (< 0 .cse17)))))))) (let ((.cse18 (= v_main_~t~0_21 (+ (* 2 v_main_~a~0_21) 1)))) (and (or (not (= |__VERIFIER_assert_#in~cond| 1)) (not .cse18)) (or (not (= |__VERIFIER_assert_#in~cond| 0)) .cse18))) (not (<= 1 v_main_~s~0_21))))) [2022-04-06 18:42:32,033 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 18:42:32,033 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))) [2022-04-06 18:42:32,033 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))) [2022-04-06 18:42:32,033 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))) [2022-04-06 18:42:32,033 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 18:42:32,035 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1] [2022-04-06 18:42:32,036 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 18:42:32,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:42:32 BoogieIcfgContainer [2022-04-06 18:42:32,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 18:42:32,046 INFO L158 Benchmark]: Toolchain (without parser) took 247011.80ms. Allocated memory was 203.4MB in the beginning and 244.3MB in the end (delta: 40.9MB). Free memory was 154.5MB in the beginning and 97.6MB in the end (delta: 56.9MB). Peak memory consumption was 97.7MB. Max. memory is 8.0GB. [2022-04-06 18:42:32,046 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 203.4MB. Free memory is still 170.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 18:42:32,046 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.98ms. Allocated memory is still 203.4MB. Free memory was 154.3MB in the beginning and 179.2MB in the end (delta: -24.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 18:42:32,047 INFO L158 Benchmark]: Boogie Preprocessor took 29.55ms. Allocated memory is still 203.4MB. Free memory was 179.2MB in the beginning and 178.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 18:42:32,047 INFO L158 Benchmark]: RCFGBuilder took 243.81ms. Allocated memory is still 203.4MB. Free memory was 178.1MB in the beginning and 167.7MB in the end (delta: 10.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 18:42:32,047 INFO L158 Benchmark]: TraceAbstraction took 246532.00ms. Allocated memory was 203.4MB in the beginning and 244.3MB in the end (delta: 40.9MB). Free memory was 167.1MB in the beginning and 97.6MB in the end (delta: 69.5MB). Peak memory consumption was 110.9MB. Max. memory is 8.0GB. [2022-04-06 18:42:32,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 203.4MB. Free memory is still 170.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.98ms. Allocated memory is still 203.4MB. Free memory was 154.3MB in the beginning and 179.2MB in the end (delta: -24.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.55ms. Allocated memory is still 203.4MB. Free memory was 179.2MB in the beginning and 178.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 243.81ms. Allocated memory is still 203.4MB. Free memory was 178.1MB in the beginning and 167.7MB in the end (delta: 10.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 246532.00ms. Allocated memory was 203.4MB in the beginning and 244.3MB in the end (delta: 40.9MB). Free memory was 167.1MB in the beginning and 97.6MB in the end (delta: 69.5MB). Peak memory consumption was 110.9MB. 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: 246.4s, OverallIterations: 6, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 19.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 143.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 97 mSDsluCounter, 647 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 128 IncrementalHoareTripleChecker+Unchecked, 476 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 435 IncrementalHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 171 mSDtfsCounter, 435 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 212 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 95.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=5, InterpolantAutomatonStates: 53, 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, 189 NumberOfFragments, 1076 HoareAnnotationTreeSize, 133 FomulaSimplifications, 222 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 31 FomulaSimplificationsInter, 7436 FormulaSimplificationTreeSizeReductionInter, 143.6s 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: (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: !(\old(cond) == 0) && cond == \old(cond) - 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! [2022-04-06 18:42:32,271 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-04-06 18:42:32,317 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 137 Received shutdown request...