/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:41:40,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:41:40,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:41:40,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 23:41:40,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:41:40,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:41:40,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:41:40,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:41:40,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:41:40,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:41:40,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:41:40,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:41:40,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:41:40,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:41:40,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:41:40,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:41:40,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 23:41:40,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:41:40,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:41:40,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:41:40,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:41:40,188 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:41:40,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:41:40,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:41:40,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:41:40,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:41:40,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:41:40,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:41:40,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:41:40,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:41:40,190 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:41:40,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:41:40,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:41:40,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:41:40,191 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:41:40,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:41:40,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:41:40,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:41:40,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:41:40,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:41:40,192 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:41:40,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:41:40,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:41:40,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:41:40,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:41:40,405 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:41:40,406 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:41:40,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-01-31 23:41:40,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60164624/8a631cda13b048f68c674c79edbbae1b/FLAG56664f06d [2022-01-31 23:41:40,767 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:41:40,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c [2022-01-31 23:41:40,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60164624/8a631cda13b048f68c674c79edbbae1b/FLAG56664f06d [2022-01-31 23:41:41,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60164624/8a631cda13b048f68c674c79edbbae1b [2022-01-31 23:41:41,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:41:41,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:41:41,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:41:41,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:41:41,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:41:41,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30c8c5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41, skipping insertion in model container [2022-01-31 23:41:41,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:41:41,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:41:41,364 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2022-01-31 23:41:41,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:41:41,400 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:41:41,408 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound10.c[537,550] [2022-01-31 23:41:41,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:41:41,426 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:41:41,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41 WrapperNode [2022-01-31 23:41:41,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:41:41,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:41:41,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:41:41,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:41:41,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:41:41,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:41:41,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:41:41,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:41:41,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (1/1) ... [2022-01-31 23:41:41,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:41:41,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:41:41,511 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) [2022-01-31 23:41:41,526 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 [2022-01-31 23:41:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:41:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:41:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:41:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 23:41:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:41:41,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:41:41,537 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:41:41,537 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:41:41,537 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:41:41,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:41:41,579 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:41:41,580 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:41:41,672 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:41:41,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:41:41,676 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 23:41:41,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:41:41 BoogieIcfgContainer [2022-01-31 23:41:41,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:41:41,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:41:41,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:41:41,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:41:41,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:41:41" (1/3) ... [2022-01-31 23:41:41,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449d4b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:41:41, skipping insertion in model container [2022-01-31 23:41:41,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:41:41" (2/3) ... [2022-01-31 23:41:41,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449d4b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:41:41, skipping insertion in model container [2022-01-31 23:41:41,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:41:41" (3/3) ... [2022-01-31 23:41:41,685 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound10.c [2022-01-31 23:41:41,688 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:41:41,697 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:41:41,725 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:41:41,730 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 [2022-01-31 23:41:41,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:41:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 23:41:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:41:41,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:41:41,745 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:41:41,745 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:41:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:41:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2022-01-31 23:41:41,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:41:41,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160697860] [2022-01-31 23:41:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:41:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:41:41,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:41:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:41:41,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:41:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:41:41,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:41:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:41:41,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 23:41:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:41:41,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 23:41:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:41:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 23:41:41,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:41:41,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160697860] [2022-01-31 23:41:41,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [160697860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:41:41,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:41:41,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:41:41,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028258811] [2022-01-31 23:41:41,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:41:41,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:41:41,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:41:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:41:41,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:41:41,959 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 23:41:42,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:41:42,022 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-01-31 23:41:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:41:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-01-31 23:41:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:41:42,029 INFO L225 Difference]: With dead ends: 57 [2022-01-31 23:41:42,029 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 23:41:42,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:41:42,036 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:41:42,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:41:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 23:41:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 23:41:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 23:41:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 23:41:42,062 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-01-31 23:41:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:41:42,063 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 23:41:42,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 23:41:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 23:41:42,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:41:42,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:41:42,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:41:42,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:41:42,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:41:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:41:42,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2022-01-31 23:41:42,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:41:42,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641749464] [2022-01-31 23:41:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:41:42,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:41:42,068 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:41:42,081 WARN L127 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2022-01-31 23:41:42,081 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2022-01-31 23:41:42,085 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 23:41:42,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:41:42,089 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-31 23:41:42,091 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 23:41:42,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:41:42 BoogieIcfgContainer [2022-01-31 23:41:42,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 23:41:42,104 INFO L158 Benchmark]: Toolchain (without parser) took 901.60ms. Allocated memory is still 191.9MB. Free memory was 140.7MB in the beginning and 126.6MB in the end (delta: 14.1MB). Peak memory consumption was 14.0MB. Max. memory is 8.0GB. [2022-01-31 23:41:42,104 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory is still 156.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 23:41:42,105 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.42ms. Allocated memory is still 191.9MB. Free memory was 140.6MB in the beginning and 166.2MB in the end (delta: -25.6MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. [2022-01-31 23:41:42,107 INFO L158 Benchmark]: Boogie Preprocessor took 31.91ms. Allocated memory is still 191.9MB. Free memory was 166.2MB in the beginning and 164.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 23:41:42,108 INFO L158 Benchmark]: RCFGBuilder took 216.32ms. Allocated memory is still 191.9MB. Free memory was 164.7MB in the beginning and 154.9MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-31 23:41:42,109 INFO L158 Benchmark]: TraceAbstraction took 424.80ms. Allocated memory is still 191.9MB. Free memory was 154.2MB in the beginning and 126.6MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2022-01-31 23:41:42,113 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 191.9MB. Free memory is still 156.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 223.42ms. Allocated memory is still 191.9MB. Free memory was 140.6MB in the beginning and 166.2MB in the end (delta: -25.6MB). Peak memory consumption was 9.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.91ms. Allocated memory is still 191.9MB. Free memory was 166.2MB in the beginning and 164.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 216.32ms. Allocated memory is still 191.9MB. Free memory was 164.7MB in the beginning and 154.9MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 424.80ms. Allocated memory is still 191.9MB. Free memory was 154.2MB in the beginning and 126.6MB in the end (delta: 27.7MB). 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 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int a, b; [L22] long long x, y, z; [L24] a = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not(a>=0 && a<=10) [L10] COND FALSE !(!cond) [L25] RET assume_abort_if_not(a>=0 && a<=10) [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b>=0 && b<=10) [L10] COND FALSE !(!cond) [L27] RET assume_abort_if_not(b>=0 && b<=10) [L28] CALL assume_abort_if_not(b >= 1) [L10] COND FALSE !(!cond) [L28] RET assume_abort_if_not(b >= 1) [L30] x = a [L31] y = b [L32] z = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(z + x * y == (long long) a * b) [L13] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 31 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-01-31 23:41:42,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...