/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 21:09:56,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 21:09:56,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 21:09:56,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 21:09:56,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 21:09:56,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 21:09:56,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 21:09:56,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 21:09:56,913 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 21:09:56,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 21:09:56,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 21:09:56,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 21:09:56,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 21:09:56,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 21:09:56,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 21:09:56,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 21:09:56,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 21:09:56,916 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 21:09:56,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 21:09:56,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 21:09:56,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 21:09:56,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 21:09:56,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 21:09:56,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:09:56,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 21:09:56,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 21:09:56,918 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 21:09:56,918 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 21:09:56,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 21:09:56,918 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 21:09:56,918 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 21:09:57,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 21:09:57,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 21:09:57,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 21:09:57,164 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 21:09:57,164 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 21:09:57,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_valuebound50.c [2022-03-20 21:09:57,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba38874d4/8dc323a3256244e6bff85848e9bee50a/FLAG2fa0ff068 [2022-03-20 21:09:57,596 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 21:09:57,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire2_valuebound50.c [2022-03-20 21:09:57,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba38874d4/8dc323a3256244e6bff85848e9bee50a/FLAG2fa0ff068 [2022-03-20 21:09:57,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba38874d4/8dc323a3256244e6bff85848e9bee50a [2022-03-20 21:09:57,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 21:09:57,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 21:09:57,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 21:09:57,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 21:09:57,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 21:09:57,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c874e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57, skipping insertion in model container [2022-03-20 21:09:57,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 21:09:57,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 21:09:57,821 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/freire2_valuebound50.c[709,722] [2022-03-20 21:09:57,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:09:57,860 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 21:09:57,871 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/freire2_valuebound50.c[709,722] [2022-03-20 21:09:57,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:09:57,904 INFO L208 MainTranslator]: Completed translation [2022-03-20 21:09:57,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57 WrapperNode [2022-03-20 21:09:57,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 21:09:57,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 21:09:57,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 21:09:57,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 21:09:57,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 21:09:57,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 21:09:57,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 21:09:57,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 21:09:57,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (1/1) ... [2022-03-20 21:09:57,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:09:57,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:57,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 21:09:57,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 21:09:58,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 21:09:58,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 21:09:58,022 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 21:09:58,022 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 21:09:58,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 21:09:58,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 21:09:58,022 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 21:09:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 21:09:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 21:09:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 21:09:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-03-20 21:09:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 21:09:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 21:09:58,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 21:09:58,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 21:09:58,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 21:09:58,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 21:09:58,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 21:09:58,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 21:09:58,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 21:09:58,085 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 21:09:58,086 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 21:09:58,199 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 21:09:58,204 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 21:09:58,204 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 21:09:58,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:09:58 BoogieIcfgContainer [2022-03-20 21:09:58,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 21:09:58,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 21:09:58,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 21:09:58,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 21:09:58,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:09:57" (1/3) ... [2022-03-20 21:09:58,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e05c79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:09:58, skipping insertion in model container [2022-03-20 21:09:58,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:09:57" (2/3) ... [2022-03-20 21:09:58,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e05c79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:09:58, skipping insertion in model container [2022-03-20 21:09:58,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:09:58" (3/3) ... [2022-03-20 21:09:58,216 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_valuebound50.c [2022-03-20 21:09:58,220 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 21:09:58,220 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 21:09:58,272 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 21:09:58,277 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 21:09:58,278 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 21:09:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 21:09:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 21:09:58,304 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:58,304 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:58,305 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-03-20 21:09:58,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:58,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [460693078] [2022-03-20 21:09:58,326 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:58,327 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 2 times [2022-03-20 21:09:58,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:58,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577337436] [2022-03-20 21:09:58,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:58,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:09:58,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:09:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:09:58,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 21:09:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:09:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 21:09:58,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:58,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577337436] [2022-03-20 21:09:58,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577337436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:58,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:58,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 21:09:58,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:58,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [460693078] [2022-03-20 21:09:58,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [460693078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:58,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:58,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 21:09:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183996339] [2022-03-20 21:09:58,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:58,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 21:09:58,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 21:09:58,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 21:09:58,558 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 21:09:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:58,633 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-03-20 21:09:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 21:09:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 21:09:58,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:58,649 INFO L225 Difference]: With dead ends: 53 [2022-03-20 21:09:58,650 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 21:09:58,652 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 [2022-03-20 21:09:58,657 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:58,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 21:09:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 21:09:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 21:09:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-03-20 21:09:58,712 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-03-20 21:09:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:58,713 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-03-20 21:09:58,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 21:09:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-03-20 21:09:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 21:09:58,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:58,715 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:58,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 21:09:58,716 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-03-20 21:09:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:58,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1926622453] [2022-03-20 21:09:58,722 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:58,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 2 times [2022-03-20 21:09:58,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:58,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931195729] [2022-03-20 21:09:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:58,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:58,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619343317] [2022-03-20 21:09:58,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:09:58,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:58,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:58,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:09:58,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 21:09:58,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 21:09:58,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 21:09:58,817 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 21:09:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 21:09:58,848 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 21:09:58,850 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 21:09:58,850 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 21:09:58,854 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 21:09:58,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 21:09:59,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:59,082 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2] [2022-03-20 21:09:59,085 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 21:09:59,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:09:59 BoogieIcfgContainer [2022-03-20 21:09:59,098 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 21:09:59,104 INFO L158 Benchmark]: Toolchain (without parser) took 1469.47ms. Allocated memory was 177.2MB in the beginning and 231.7MB in the end (delta: 54.5MB). Free memory was 120.9MB in the beginning and 156.8MB in the end (delta: -35.9MB). Peak memory consumption was 18.4MB. Max. memory is 8.0GB. [2022-03-20 21:09:59,104 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 177.2MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 21:09:59,105 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.79ms. Allocated memory was 177.2MB in the beginning and 231.7MB in the end (delta: 54.5MB). Free memory was 120.6MB in the beginning and 203.4MB in the end (delta: -82.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 21:09:59,106 INFO L158 Benchmark]: Boogie Preprocessor took 39.93ms. Allocated memory is still 231.7MB. Free memory was 203.4MB in the beginning and 201.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 21:09:59,106 INFO L158 Benchmark]: RCFGBuilder took 257.93ms. Allocated memory is still 231.7MB. Free memory was 201.9MB in the beginning and 190.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 21:09:59,107 INFO L158 Benchmark]: TraceAbstraction took 891.21ms. Allocated memory is still 231.7MB. Free memory was 190.4MB in the beginning and 156.8MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 8.0GB. [2022-03-20 21:09:59,112 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 177.2MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 273.79ms. Allocated memory was 177.2MB in the beginning and 231.7MB in the end (delta: 54.5MB). Free memory was 120.6MB in the beginning and 203.4MB in the end (delta: -82.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.93ms. Allocated memory is still 231.7MB. Free memory was 203.4MB in the beginning and 201.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 257.93ms. Allocated memory is still 231.7MB. Free memory was 201.9MB in the beginning and 190.9MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 891.21ms. Allocated memory is still 231.7MB. Free memory was 190.4MB in the beginning and 156.8MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34, overapproximation of someBinaryDOUBLEComparisonOperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(a>=0 && a<=50) [L14] COND FALSE !(!cond) [L28] RET assume_abort_if_not(a>=0 && a<=50) [L29] x = a [L30] s = 3.25 [L31] r = 1 [L33] COND TRUE 1 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) [L17] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15 mSDsluCounter, 32 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9 IncrementalHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 29 mSDtfsCounter, 9 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-03-20 21:09:59,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...