/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/matrix-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:00:24,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:00:24,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:00:24,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:00:24,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:00:24,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:00:24,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:00:24,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:00:24,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:00:24,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:00:24,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:00:24,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:00:24,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:00:24,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:00:24,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:00:24,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:00:24,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:00:24,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:00:24,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:00:24,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:00:24,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:00:24,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:00:24,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:00:24,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:00:24,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:00:24,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:00:24,850 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:00:24,850 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:00:24,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:00:24,851 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:00:24,851 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:00:25,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:00:25,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:00:25,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:00:25,110 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:00:25,111 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:00:25,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/matrix-2.c [2022-03-18 00:00:25,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a046f8a0/2522ecdd957c48688de886bb7e7639ff/FLAG3309314f1 [2022-03-18 00:00:25,548 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:00:25,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/matrix-2.c [2022-03-18 00:00:25,553 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a046f8a0/2522ecdd957c48688de886bb7e7639ff/FLAG3309314f1 [2022-03-18 00:00:25,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a046f8a0/2522ecdd957c48688de886bb7e7639ff [2022-03-18 00:00:25,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:00:25,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:00:25,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:00:25,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:00:25,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:00:25,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66662c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25, skipping insertion in model container [2022-03-18 00:00:25,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:00:25,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:00:25,731 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/matrix-2.c[320,333] [2022-03-18 00:00:25,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:00:25,757 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:00:25,771 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/matrix-2.c[320,333] [2022-03-18 00:00:25,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:00:25,807 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:00:25,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25 WrapperNode [2022-03-18 00:00:25,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:00:25,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:00:25,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:00:25,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:00:25,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,835 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:00:25,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:00:25,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:00:25,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:00:25,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (1/1) ... [2022-03-18 00:00:25,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:00:25,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:25,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:00:25,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:00:25,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:00:25,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:00:25,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:00:25,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:00:25,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:00:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:00:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:00:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:00:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:00:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:00:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:00:25,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:00:25,983 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:00:25,984 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:00:26,136 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:00:26,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:00:26,153 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-18 00:00:26,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:00:26 BoogieIcfgContainer [2022-03-18 00:00:26,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:00:26,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:00:26,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:00:26,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:00:26,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:00:25" (1/3) ... [2022-03-18 00:00:26,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e20599d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:00:26, skipping insertion in model container [2022-03-18 00:00:26,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:00:25" (2/3) ... [2022-03-18 00:00:26,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e20599d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:00:26, skipping insertion in model container [2022-03-18 00:00:26,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:00:26" (3/3) ... [2022-03-18 00:00:26,167 INFO L111 eAbstractionObserver]: Analyzing ICFG matrix-2.c [2022-03-18 00:00:26,172 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:00:26,172 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:00:26,221 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:00:26,228 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 00:00:26,228 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:00:26,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:00:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 00:00:26,249 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:26,250 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:26,251 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:26,257 INFO L85 PathProgramCache]: Analyzing trace with hash -691068696, now seen corresponding path program 1 times [2022-03-18 00:00:26,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:26,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009856684] [2022-03-18 00:00:26,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:00:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash -691068696, now seen corresponding path program 2 times [2022-03-18 00:00:26,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:26,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715405764] [2022-03-18 00:00:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:26,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 00:00:26,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645681545] [2022-03-18 00:00:26,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:26,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:26,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:00:26,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:00:26,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 00:00:26,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:00:26,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:00:26,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:00:26,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 00:00:26,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:26,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715405764] [2022-03-18 00:00:26,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 00:00:26,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645681545] [2022-03-18 00:00:26,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645681545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:26,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:26,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:26,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:26,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009856684] [2022-03-18 00:00:26,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009856684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:26,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:26,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:26,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203714932] [2022-03-18 00:00:26,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:26,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:00:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:00:26,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:00:26,633 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:00:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:26,709 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2022-03-18 00:00:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:00:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 14 [2022-03-18 00:00:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:26,716 INFO L225 Difference]: With dead ends: 68 [2022-03-18 00:00:26,716 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:00:26,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:00:26,722 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:26,723 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 93 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:00:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:00:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-03-18 00:00:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-18 00:00:26,756 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2022-03-18 00:00:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:26,757 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-18 00:00:26,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:00:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-18 00:00:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:00:26,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:26,758 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:26,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 00:00:26,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-18 00:00:26,961 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1002836895, now seen corresponding path program 1 times [2022-03-18 00:00:26,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:26,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245166939] [2022-03-18 00:00:27,090 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:00:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1825472399, now seen corresponding path program 1 times [2022-03-18 00:00:27,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:27,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64072446] [2022-03-18 00:00:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:27,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 00:00:27,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653099835] [2022-03-18 00:00:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:27,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:27,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:27,105 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:00:27,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:00:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:27,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 00:00:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:00:27,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 00:00:27,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:27,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64072446] [2022-03-18 00:00:27,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 00:00:27,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653099835] [2022-03-18 00:00:27,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653099835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:27,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:27,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:27,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:27,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [245166939] [2022-03-18 00:00:27,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [245166939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:27,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:27,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:00:27,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871179407] [2022-03-18 00:00:27,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:27,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:00:27,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:00:27,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:00:27,356 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:00:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:27,488 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2022-03-18 00:00:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:00:27,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 00:00:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:27,490 INFO L225 Difference]: With dead ends: 68 [2022-03-18 00:00:27,490 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 00:00:27,491 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:00:27,496 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:27,500 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 80 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 00:00:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-03-18 00:00:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-18 00:00:27,515 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2022-03-18 00:00:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:27,515 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-18 00:00:27,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:00:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-18 00:00:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 00:00:27,516 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:27,516 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:27,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:27,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-18 00:00:27,748 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1721429624, now seen corresponding path program 2 times [2022-03-18 00:00:27,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:27,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [34855900] [2022-03-18 00:00:27,865 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:00:27,958 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:00:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1954760655, now seen corresponding path program 1 times [2022-03-18 00:00:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:27,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284557551] [2022-03-18 00:00:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:27,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 00:00:27,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165306425] [2022-03-18 00:00:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:27,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:27,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:27,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:00:27,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:00:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:00:28,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 00:00:28,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:00:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:00:28,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 00:00:28,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:00:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284557551] [2022-03-18 00:00:28,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 00:00:28,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165306425] [2022-03-18 00:00:28,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165306425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:28,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:28,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:00:28,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:00:28,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [34855900] [2022-03-18 00:00:28,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [34855900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:00:28,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:00:28,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:00:28,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840737221] [2022-03-18 00:00:28,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:00:28,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:00:28,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:00:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:00:28,226 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:00:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:00:28,395 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-03-18 00:00:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:00:28,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 20 [2022-03-18 00:00:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:00:28,399 INFO L225 Difference]: With dead ends: 79 [2022-03-18 00:00:28,399 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 00:00:28,402 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:00:28,407 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:00:28,407 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:00:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 00:00:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2022-03-18 00:00:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:00:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-03-18 00:00:28,416 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2022-03-18 00:00:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:00:28,416 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-03-18 00:00:28,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:00:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-03-18 00:00:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 00:00:28,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:00:28,417 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:00:28,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:28,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:28,618 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:00:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:00:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash -230396703, now seen corresponding path program 1 times [2022-03-18 00:00:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:00:28,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975236346] [2022-03-18 00:00:28,676 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:28,679 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:00:28,679 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:00:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -230396703, now seen corresponding path program 2 times [2022-03-18 00:00:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:00:28,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855299464] [2022-03-18 00:00:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:00:28,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:00:28,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 00:00:28,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408611263] [2022-03-18 00:00:28,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:00:28,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:28,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:00:28,724 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:00:28,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:00:28,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:00:28,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-18 00:00:28,812 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 00:00:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 00:00:28,849 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 00:00:28,850 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-18 00:00:28,850 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 00:00:28,852 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 00:00:28,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:00:29,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:00:29,057 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2022-03-18 00:00:29,060 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 00:00:29,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 12:00:29 BoogieIcfgContainer [2022-03-18 00:00:29,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 00:00:29,069 INFO L158 Benchmark]: Toolchain (without parser) took 3498.84ms. Allocated memory was 188.7MB in the beginning and 234.9MB in the end (delta: 46.1MB). Free memory was 141.2MB in the beginning and 144.0MB in the end (delta: -2.8MB). Peak memory consumption was 42.7MB. Max. memory is 8.0GB. [2022-03-18 00:00:29,069 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 188.7MB. Free memory is still 157.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 00:00:29,070 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.46ms. Allocated memory is still 188.7MB. Free memory was 141.1MB in the beginning and 167.0MB in the end (delta: -25.9MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-03-18 00:00:29,070 INFO L158 Benchmark]: Boogie Preprocessor took 28.50ms. Allocated memory is still 188.7MB. Free memory was 167.0MB in the beginning and 165.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 00:00:29,070 INFO L158 Benchmark]: RCFGBuilder took 315.74ms. Allocated memory is still 188.7MB. Free memory was 165.1MB in the beginning and 154.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 00:00:29,070 INFO L158 Benchmark]: TraceAbstraction took 2912.63ms. Allocated memory was 188.7MB in the beginning and 234.9MB in the end (delta: 46.1MB). Free memory was 154.0MB in the beginning and 144.0MB in the end (delta: 10.0MB). Peak memory consumption was 56.0MB. Max. memory is 8.0GB. [2022-03-18 00:00:29,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 188.7MB. Free memory is still 157.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 232.46ms. Allocated memory is still 188.7MB. Free memory was 141.1MB in the beginning and 167.0MB in the end (delta: -25.9MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.50ms. Allocated memory is still 188.7MB. Free memory was 167.0MB in the beginning and 165.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 315.74ms. Allocated memory is still 188.7MB. Free memory was 165.1MB in the beginning and 154.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 2912.63ms. Allocated memory was 188.7MB in the beginning and 234.9MB in the end (delta: 46.1MB). Free memory was 154.0MB in the beginning and 144.0MB in the end (delta: 10.0MB). Peak memory consumption was 56.0MB. 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: [L16] unsigned int N_LIN=__VERIFIER_nondet_uint(); [L17] unsigned int N_COL=__VERIFIER_nondet_uint(); [L18] unsigned int j,k; [L19] int matriz[N_COL][N_LIN], maior; [L21] maior = __VERIFIER_nondet_int() [L22] j=0 [L22] COND TRUE jmaior [L28] EXPR matriz[j][k] [L28] maior = matriz[j][k] [L23] k++ [L23] COND FALSE !(k