/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/terminator_01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:32:12,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:32:12,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:32:13,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:32:13,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:32:13,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:32:13,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:32:13,085 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:32:13,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:32:13,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:32:13,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:32:13,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:32:13,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:32:13,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:32:13,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:32:13,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:32:13,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:32:13,097 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:32:13,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:32:13,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:32:13,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:32:13,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:32:13,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:32:13,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:32:13,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:32:13,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:32:13,098 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:32:13,098 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:32:13,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:32:13,098 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:32:13,098 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:32:13,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:32:13,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:32:13,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:32:13,344 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:32:13,345 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:32:13,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_01.c [2022-04-06 19:32:13,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c698eb404/a5e30c3fd4734eacab5f32cb06d0f705/FLAGbf22a163f [2022-04-06 19:32:13,749 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:32:13,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_01.c [2022-04-06 19:32:13,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c698eb404/a5e30c3fd4734eacab5f32cb06d0f705/FLAGbf22a163f [2022-04-06 19:32:13,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c698eb404/a5e30c3fd4734eacab5f32cb06d0f705 [2022-04-06 19:32:13,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:32:13,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:32:13,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:32:13,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:32:13,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:32:13,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad596f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13, skipping insertion in model container [2022-04-06 19:32:13,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:32:13,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:32:13,929 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/terminator_01.c[325,338] [2022-04-06 19:32:13,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:32:13,943 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:32:13,950 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/terminator_01.c[325,338] [2022-04-06 19:32:13,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:32:13,959 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:32:13,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13 WrapperNode [2022-04-06 19:32:13,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:32:13,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:32:13,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:32:13,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:32:13,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:32:13,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:32:13,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:32:13,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:32:13,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (1/1) ... [2022-04-06 19:32:13,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:32:14,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:32:14,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:32:14,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:32:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:32:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:32:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:32:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:32:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:32:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:32:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:32:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:32:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:32:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:32:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 19:32:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:32:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 19:32:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:32:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:32:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:32:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:32:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:32:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:32:14,108 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:32:14,109 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:32:14,194 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:32:14,197 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:32:14,198 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 19:32:14,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:32:14 BoogieIcfgContainer [2022-04-06 19:32:14,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:32:14,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:32:14,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:32:14,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:32:14,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:32:13" (1/3) ... [2022-04-06 19:32:14,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0da1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:32:14, skipping insertion in model container [2022-04-06 19:32:14,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:32:13" (2/3) ... [2022-04-06 19:32:14,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b0da1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:32:14, skipping insertion in model container [2022-04-06 19:32:14,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:32:14" (3/3) ... [2022-04-06 19:32:14,204 INFO L111 eAbstractionObserver]: Analyzing ICFG terminator_01.c [2022-04-06 19:32:14,207 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:32:14,207 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:32:14,240 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:32:14,246 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:32:14,246 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:32:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-04-06 19:32:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:32:14,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:14,261 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:14,261 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1035305623, now seen corresponding path program 1 times [2022-04-06 19:32:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1286433461] [2022-04-06 19:32:14,283 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:32:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1035305623, now seen corresponding path program 2 times [2022-04-06 19:32:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:14,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220889957] [2022-04-06 19:32:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:14,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:14,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:32:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:32:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:32:14,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:32:14,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220889957] [2022-04-06 19:32:14,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220889957] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:14,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:14,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:32:14,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:32:14,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1286433461] [2022-04-06 19:32:14,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1286433461] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:32:14,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:32:14,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:32:14,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122239673] [2022-04-06 19:32:14,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:32:14,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:32:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:32:14,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:32:14,485 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 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) [2022-04-06 19:32:14,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:32:14,506 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-06 19:32:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:32:14,507 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 [2022-04-06 19:32:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:32:14,511 INFO L225 Difference]: With dead ends: 32 [2022-04-06 19:32:14,511 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 19:32:14,522 INFO L912 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 [2022-04-06 19:32:14,527 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:32:14,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:32:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 19:32:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 19:32:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 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) [2022-04-06 19:32:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-04-06 19:32:14,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-04-06 19:32:14,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:32:14,554 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-04-06 19:32:14,554 INFO L479 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) [2022-04-06 19:32:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-04-06 19:32:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 19:32:14,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:32:14,555 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:32:14,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:32:14,555 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:32:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:32:14,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2042096758, now seen corresponding path program 1 times [2022-04-06 19:32:14,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:32:14,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [601787615] [2022-04-06 19:32:14,559 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:32:14,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2042096758, now seen corresponding path program 2 times [2022-04-06 19:32:14,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:32:14,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977665992] [2022-04-06 19:32:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:32:14,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:32:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 19:32:14,592 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 19:32:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 19:32:14,624 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 19:32:14,627 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 19:32:14,627 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 19:32:14,630 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 19:32:14,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:32:14,634 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2] [2022-04-06 19:32:14,637 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 19:32:14,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:32:14 BoogieIcfgContainer [2022-04-06 19:32:14,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 19:32:14,647 INFO L158 Benchmark]: Toolchain (without parser) took 877.73ms. Allocated memory is still 195.0MB. Free memory was 145.1MB in the beginning and 132.5MB in the end (delta: 12.7MB). Peak memory consumption was 13.0MB. Max. memory is 8.0GB. [2022-04-06 19:32:14,647 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 195.0MB. Free memory is still 161.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 19:32:14,649 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.50ms. Allocated memory is still 195.0MB. Free memory was 145.0MB in the beginning and 171.5MB in the end (delta: -26.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 19:32:14,650 INFO L158 Benchmark]: Boogie Preprocessor took 28.97ms. Allocated memory is still 195.0MB. Free memory was 171.5MB in the beginning and 169.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 19:32:14,652 INFO L158 Benchmark]: RCFGBuilder took 207.85ms. Allocated memory is still 195.0MB. Free memory was 169.9MB in the beginning and 160.2MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 19:32:14,652 INFO L158 Benchmark]: TraceAbstraction took 446.10ms. Allocated memory is still 195.0MB. Free memory was 159.7MB in the beginning and 132.5MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-04-06 19:32:14,655 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 195.0MB. Free memory is still 161.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.50ms. Allocated memory is still 195.0MB. Free memory was 145.0MB in the beginning and 171.5MB in the end (delta: -26.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.97ms. Allocated memory is still 195.0MB. Free memory was 171.5MB in the beginning and 169.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 207.85ms. Allocated memory is still 195.0MB. Free memory was 169.9MB in the beginning and 160.2MB in the end (delta: 9.7MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 446.10ms. Allocated memory is still 195.0MB. Free memory was 159.7MB in the beginning and 132.5MB in the end (delta: 27.3MB). 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=__VERIFIER_nondet_int(); [L15] int x=__VERIFIER_nondet_int(); [L16] int *p = &x; [L18] EXPR \read(x) [L18] COND FALSE !(x<100) [L21] CALL __VERIFIER_assert(0) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, 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, 12 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 19 mSDtfsCounter, 3 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=20occurred 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! [2022-04-06 19:32:14,679 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...