/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/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 02:46:42,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 02:46:42,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 02:46:42,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 02:46:42,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 02:46:42,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 02:46:42,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 02:46:42,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 02:46:42,770 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 02:46:42,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 02:46:42,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 02:46:42,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 02:46:42,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 02:46:42,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 02:46:42,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 02:46:42,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 02:46:42,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 02:46:42,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 02:46:42,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 02:46:42,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 02:46:42,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 02:46:42,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 02:46:42,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 02:46:42,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:46:42,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 02:46:42,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 02:46:42,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 02:46:42,779 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 02:46:42,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 02:46:42,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 02:46:42,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 02:46:42,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 02:46:42,996 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 02:46:43,012 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 02:46:43,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2022-02-24 02:46:43,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f84af8a77/344cd0a6d17c444fa2fa9899fbf89403/FLAGd5f8c856c [2022-02-24 02:46:43,429 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 02:46:43,430 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2022-02-24 02:46:43,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f84af8a77/344cd0a6d17c444fa2fa9899fbf89403/FLAGd5f8c856c [2022-02-24 02:46:43,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f84af8a77/344cd0a6d17c444fa2fa9899fbf89403 [2022-02-24 02:46:43,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 02:46:43,450 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 02:46:43,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 02:46:43,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 02:46:43,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 02:46:43,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec949ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43, skipping insertion in model container [2022-02-24 02:46:43,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 02:46:43,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 02:46:43,596 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/trex02-2.c[320,333] [2022-02-24 02:46:43,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:46:43,625 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 02:46:43,634 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/trex02-2.c[320,333] [2022-02-24 02:46:43,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 02:46:43,654 INFO L208 MainTranslator]: Completed translation [2022-02-24 02:46:43,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43 WrapperNode [2022-02-24 02:46:43,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 02:46:43,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 02:46:43,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 02:46:43,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 02:46:43,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 02:46:43,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 02:46:43,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 02:46:43,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 02:46:43,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (1/1) ... [2022-02-24 02:46:43,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 02:46:43,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 02:46:43,741 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) [2022-02-24 02:46:43,763 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 [2022-02-24 02:46:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 02:46:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 02:46:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 02:46:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 02:46:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-02-24 02:46:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 02:46:43,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 02:46:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 02:46:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 02:46:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 02:46:43,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 02:46:43,819 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 02:46:43,821 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 02:46:43,901 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 02:46:43,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 02:46:43,905 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 02:46:43,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:46:43 BoogieIcfgContainer [2022-02-24 02:46:43,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 02:46:43,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 02:46:43,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 02:46:43,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 02:46:43,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 02:46:43" (1/3) ... [2022-02-24 02:46:43,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eeaa124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:46:43, skipping insertion in model container [2022-02-24 02:46:43,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 02:46:43" (2/3) ... [2022-02-24 02:46:43,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eeaa124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 02:46:43, skipping insertion in model container [2022-02-24 02:46:43,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 02:46:43" (3/3) ... [2022-02-24 02:46:43,913 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2022-02-24 02:46:43,917 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 02:46:43,917 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 02:46:43,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 02:46:43,953 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=QVASR [2022-02-24 02:46:43,953 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 02:46:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 02:46:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 02:46:43,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:43,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:43,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1589172536, now seen corresponding path program 1 times [2022-02-24 02:46:43,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:44,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489089737] [2022-02-24 02:46:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:44,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:44,052 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:46:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:44,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 02:46:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 02:46:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 02:46:44,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 02:46:44,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489089737] [2022-02-24 02:46:44,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489089737] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 02:46:44,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 02:46:44,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 02:46:44,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048034327] [2022-02-24 02:46:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 02:46:44,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 02:46:44,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 02:46:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 02:46:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:46:44,243 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 02:46:44,321 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-02-24 02:46:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 02:46:44,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-24 02:46:44,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 02:46:44,337 INFO L225 Difference]: With dead ends: 35 [2022-02-24 02:46:44,338 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 02:46:44,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 02:46:44,349 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 02:46:44,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 02:46:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 02:46:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 02:46:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 12 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 02:46:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-02-24 02:46:44,380 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2022-02-24 02:46:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 02:46:44,380 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-02-24 02:46:44,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 02:46:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-02-24 02:46:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 02:46:44,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 02:46:44,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 02:46:44,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 02:46:44,382 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 02:46:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 02:46:44,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1578090284, now seen corresponding path program 1 times [2022-02-24 02:46:44,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 02:46:44,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114721644] [2022-02-24 02:46:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 02:46:44,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 02:46:44,386 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 02:46:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 02:46:44,406 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 02:46:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 02:46:44,431 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 02:46:44,431 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 02:46:44,433 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 02:46:44,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 02:46:44,446 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-24 02:46:44,450 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 02:46:44,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 02:46:44 BoogieIcfgContainer [2022-02-24 02:46:44,459 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 02:46:44,459 INFO L158 Benchmark]: Toolchain (without parser) took 1009.46ms. Allocated memory was 167.8MB in the beginning and 237.0MB in the end (delta: 69.2MB). Free memory was 109.1MB in the beginning and 172.7MB in the end (delta: -63.7MB). Peak memory consumption was 4.4MB. Max. memory is 8.0GB. [2022-02-24 02:46:44,460 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 167.8MB. Free memory is still 125.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 02:46:44,460 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.82ms. Allocated memory was 167.8MB in the beginning and 237.0MB in the end (delta: 69.2MB). Free memory was 108.8MB in the beginning and 212.6MB in the end (delta: -103.7MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. [2022-02-24 02:46:44,460 INFO L158 Benchmark]: Boogie Preprocessor took 39.93ms. Allocated memory is still 237.0MB. Free memory was 212.0MB in the beginning and 210.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 02:46:44,461 INFO L158 Benchmark]: RCFGBuilder took 209.54ms. Allocated memory is still 237.0MB. Free memory was 210.5MB in the beginning and 200.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-24 02:46:44,461 INFO L158 Benchmark]: TraceAbstraction took 550.61ms. Allocated memory is still 237.0MB. Free memory was 199.5MB in the beginning and 172.7MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-02-24 02:46:44,467 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 167.8MB. Free memory is still 125.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.82ms. Allocated memory was 167.8MB in the beginning and 237.0MB in the end (delta: 69.2MB). Free memory was 108.8MB in the beginning and 212.6MB in the end (delta: -103.7MB). Peak memory consumption was 13.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.93ms. Allocated memory is still 237.0MB. Free memory was 212.0MB in the beginning and 210.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 209.54ms. Allocated memory is still 237.0MB. Free memory was 210.5MB in the beginning and 200.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 550.61ms. Allocated memory is still 237.0MB. Free memory was 199.5MB in the beginning and 172.7MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. 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: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x; [L22] x=__VERIFIER_nondet_int() [L23] COND FALSE !(x > 0) [L28] CALL __VERIFIER_assert(x==0) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 29 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 25 mSDtfsCounter, 13 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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 proved your program to be incorrect! [2022-02-24 02:46:44,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...