/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/loops/sum_array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:01:05,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:01:05,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:01:05,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:01:06,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:01:06,012 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:01:06,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:01:06,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:01:06,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:01:06,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:01:06,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:01:06,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:01:06,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:01:06,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:01:06,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:01:06,015 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:01:06,015 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:01:06,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:01:06,015 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:01:06,015 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:01:06,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:01:06,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:01:06,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:01:06,217 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:01:06,219 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:01:06,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2022-03-18 00:01:06,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9439cd615/a0982d10327647f98ed76ee3b92a3c7c/FLAGa503e7150 [2022-03-18 00:01:06,599 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:01:06,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2022-03-18 00:01:06,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9439cd615/a0982d10327647f98ed76ee3b92a3c7c/FLAGa503e7150 [2022-03-18 00:01:06,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9439cd615/a0982d10327647f98ed76ee3b92a3c7c [2022-03-18 00:01:06,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:01:06,620 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:01:06,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:01:06,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:01:06,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:01:06,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b6ee665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06, skipping insertion in model container [2022-03-18 00:01:06,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:01:06,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:01:06,759 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c[363,376] [2022-03-18 00:01:06,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:01:06,777 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:01:06,785 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c[363,376] [2022-03-18 00:01:06,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:01:06,798 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:01:06,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06 WrapperNode [2022-03-18 00:01:06,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:01:06,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:01:06,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:01:06,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:01:06,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:01:06,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:01:06,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:01:06,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:01:06,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (1/1) ... [2022-03-18 00:01:06,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:01:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:01:06,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:01:06,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:01:06,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:01:06,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:01:06,893 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:01:06,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:01:06,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:01:06,893 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:01:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:01:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:01:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:01:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 00:01:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:01:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 00:01:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:01:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 00:01:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:01:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:01:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:01:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:01:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:01:06,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:01:06,960 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:01:06,962 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:01:07,136 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:01:07,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:01:07,140 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-18 00:01:07,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:01:07 BoogieIcfgContainer [2022-03-18 00:01:07,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:01:07,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:01:07,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:01:07,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:01:07,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:01:06" (1/3) ... [2022-03-18 00:01:07,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493e298f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:01:07, skipping insertion in model container [2022-03-18 00:01:07,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:01:06" (2/3) ... [2022-03-18 00:01:07,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493e298f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:01:07, skipping insertion in model container [2022-03-18 00:01:07,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:01:07" (3/3) ... [2022-03-18 00:01:07,148 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2022-03-18 00:01:07,152 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:01:07,152 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:01:07,195 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:01:07,203 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 00:01:07,203 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:01:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:01:07,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:01:07,233 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:01:07,234 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:01:07,234 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:01:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:01:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 955945954, now seen corresponding path program 1 times [2022-03-18 00:01:07,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:01:07,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975400081] [2022-03-18 00:01:07,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:01:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash 955945954, now seen corresponding path program 2 times [2022-03-18 00:01:07,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:01:07,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67969124] [2022-03-18 00:01:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:01:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:01:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:01:07,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:01:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:01:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:01:07,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:01:07,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67969124] [2022-03-18 00:01:07,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67969124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:01:07,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:01:07,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:01:07,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:01:07,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975400081] [2022-03-18 00:01:07,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975400081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:01:07,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:01:07,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:01:07,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505861905] [2022-03-18 00:01:07,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:01:07,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:01:07,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:01:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:01:07,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 00:01:07,576 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:01:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:01:07,791 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2022-03-18 00:01:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:01:07,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 00:01:07,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:01:07,801 INFO L225 Difference]: With dead ends: 71 [2022-03-18 00:01:07,801 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:01:07,804 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:01:07,808 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:01:07,810 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 35 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:01:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:01:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-03-18 00:01:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:01:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-18 00:01:07,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2022-03-18 00:01:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:01:07,848 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-18 00:01:07,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:01:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-18 00:01:07,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:01:07,849 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:01:07,849 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:01:07,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:01:07,850 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:01:07,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:01:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1073067556, now seen corresponding path program 1 times [2022-03-18 00:01:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:01:07,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1983891676] [2022-03-18 00:01:07,860 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:01:07,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:01:07,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1073067556, now seen corresponding path program 2 times [2022-03-18 00:01:07,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:01:07,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416350352] [2022-03-18 00:01:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:01:07,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:01:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:01:08,024 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:01:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:01:08,087 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:01:08,090 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-18 00:01:08,090 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 00:01:08,095 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 00:01:08,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:01:08,099 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2] [2022-03-18 00:01:08,101 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 00:01:08,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 12:01:08 BoogieIcfgContainer [2022-03-18 00:01:08,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 00:01:08,117 INFO L158 Benchmark]: Toolchain (without parser) took 1495.74ms. Allocated memory is still 190.8MB. Free memory was 141.5MB in the beginning and 100.0MB in the end (delta: 41.5MB). Peak memory consumption was 41.4MB. Max. memory is 8.0GB. [2022-03-18 00:01:08,118 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 190.8MB. Free memory was 157.7MB in the beginning and 157.6MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 00:01:08,119 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.86ms. Allocated memory is still 190.8MB. Free memory was 141.3MB in the beginning and 167.7MB in the end (delta: -26.4MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. [2022-03-18 00:01:08,121 INFO L158 Benchmark]: Boogie Preprocessor took 21.94ms. Allocated memory is still 190.8MB. Free memory was 167.7MB in the beginning and 166.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 00:01:08,121 INFO L158 Benchmark]: RCFGBuilder took 319.29ms. Allocated memory is still 190.8MB. Free memory was 165.6MB in the beginning and 154.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 00:01:08,121 INFO L158 Benchmark]: TraceAbstraction took 972.86ms. Allocated memory is still 190.8MB. Free memory was 153.5MB in the beginning and 100.0MB in the end (delta: 53.5MB). Peak memory consumption was 53.5MB. Max. memory is 8.0GB. [2022-03-18 00:01:08,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 190.8MB. Free memory was 157.7MB in the beginning and 157.6MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.86ms. Allocated memory is still 190.8MB. Free memory was 141.3MB in the beginning and 167.7MB in the end (delta: -26.4MB). Peak memory consumption was 8.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.94ms. Allocated memory is still 190.8MB. Free memory was 167.7MB in the beginning and 166.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 319.29ms. Allocated memory is still 190.8MB. Free memory was 165.6MB in the beginning and 154.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 972.86ms. Allocated memory is still 190.8MB. Free memory was 153.5MB in the beginning and 100.0MB in the end (delta: 53.5MB). Peak memory consumption was 53.5MB. 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 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] unsigned int M = __VERIFIER_nondet_uint(); [L17] int A[M], B[M], C[M]; [L18] unsigned int i; [L20] i=0 [L20] COND TRUE i