/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/count_up_down-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 21:59:41,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 21:59:41,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 21:59:41,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 21:59:41,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 21:59:41,568 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 21:59:41,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 21:59:41,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 21:59:41,569 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 21:59:41,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 21:59:41,569 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 21:59:41,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 21:59:41,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 21:59:41,570 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 21:59:41,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 21:59:41,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 21:59:41,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 21:59:41,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 21:59:41,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 21:59:41,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 21:59:41,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 21:59:41,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 21:59:41,571 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 21:59:41,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 21:59:41,571 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 21:59:41,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 21:59:41,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 21:59:41,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 21:59:41,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 21:59:41,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 21:59:41,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 21:59:41,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 21:59:41,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 21:59:41,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 21:59:41,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 21:59:41,572 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 21:59:41,572 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 21:59:41,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 21:59:41,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 21:59:41,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 21:59:41,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 21:59:41,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 21:59:41,790 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 21:59:41,791 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 21:59:41,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/count_up_down-1.c [2022-03-19 21:59:41,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c866e9fb/fdb438fbce504086aa07005c8cc839aa/FLAG4773336e5 [2022-03-19 21:59:42,113 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 21:59:42,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/count_up_down-1.c [2022-03-19 21:59:42,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c866e9fb/fdb438fbce504086aa07005c8cc839aa/FLAG4773336e5 [2022-03-19 21:59:42,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c866e9fb/fdb438fbce504086aa07005c8cc839aa [2022-03-19 21:59:42,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 21:59:42,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 21:59:42,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 21:59:42,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 21:59:42,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 21:59:42,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42665acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42, skipping insertion in model container [2022-03-19 21:59:42,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 21:59:42,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 21:59:42,677 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/count_up_down-1.c[327,340] [2022-03-19 21:59:42,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 21:59:42,711 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 21:59:42,723 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/count_up_down-1.c[327,340] [2022-03-19 21:59:42,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 21:59:42,734 INFO L208 MainTranslator]: Completed translation [2022-03-19 21:59:42,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42 WrapperNode [2022-03-19 21:59:42,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 21:59:42,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 21:59:42,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 21:59:42,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 21:59:42,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 21:59:42,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 21:59:42,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 21:59:42,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 21:59:42,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (1/1) ... [2022-03-19 21:59:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 21:59:42,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:42,778 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) [2022-03-19 21:59:42,780 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 [2022-03-19 21:59:42,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 21:59:42,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 21:59:42,815 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 21:59:42,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 21:59:42,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 21:59:42,816 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 21:59:42,816 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 21:59:42,816 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 21:59:42,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 21:59:42,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 21:59:42,863 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 21:59:42,864 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 21:59:42,926 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 21:59:42,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 21:59:42,930 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 21:59:42,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:59:42 BoogieIcfgContainer [2022-03-19 21:59:42,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 21:59:42,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 21:59:42,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 21:59:42,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 21:59:42,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:59:42" (1/3) ... [2022-03-19 21:59:42,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246a2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:59:42, skipping insertion in model container [2022-03-19 21:59:42,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:42" (2/3) ... [2022-03-19 21:59:42,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246a2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:59:42, skipping insertion in model container [2022-03-19 21:59:42,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:59:42" (3/3) ... [2022-03-19 21:59:42,937 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2022-03-19 21:59:42,941 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 21:59:42,941 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 21:59:42,976 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 21:59:42,981 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-19 21:59:42,982 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 21:59:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2022-03-19 21:59:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 21:59:42,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:42,997 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:42,998 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:43,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1301225826, now seen corresponding path program 1 times [2022-03-19 21:59:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:43,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740048332] [2022-03-19 21:59:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:43,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:43,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:43,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740048332] [2022-03-19 21:59:43,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740048332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:43,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 21:59:43,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 21:59:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316816533] [2022-03-19 21:59:43,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:43,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 21:59:43,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 21:59:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 21:59:43,292 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:43,426 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-03-19 21:59:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 21:59:43,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-19 21:59:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:43,436 INFO L225 Difference]: With dead ends: 37 [2022-03-19 21:59:43,436 INFO L226 Difference]: Without dead ends: 13 [2022-03-19 21:59:43,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 21:59:43,444 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:43,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 21:59:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-19 21:59:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-19 21:59:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-03-19 21:59:43,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2022-03-19 21:59:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:43,475 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-03-19 21:59:43,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-03-19 21:59:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 21:59:43,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:43,477 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:43,477 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 21:59:43,478 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:43,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:43,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1718713523, now seen corresponding path program 1 times [2022-03-19 21:59:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:43,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960983562] [2022-03-19 21:59:43,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:43,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:43,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:43,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960983562] [2022-03-19 21:59:43,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960983562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524319705] [2022-03-19 21:59:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:43,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:43,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:43,760 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) [2022-03-19 21:59:43,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 21:59:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:43,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 21:59:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:43,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:44,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524319705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:44,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:44,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 21:59:44,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596211726] [2022-03-19 21:59:44,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:44,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 21:59:44,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:44,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 21:59:44,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-19 21:59:44,088 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:44,366 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-19 21:59:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 21:59:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 21:59:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:44,367 INFO L225 Difference]: With dead ends: 22 [2022-03-19 21:59:44,368 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 21:59:44,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-03-19 21:59:44,369 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:44,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 56 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 21:59:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 21:59:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-19 21:59:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-03-19 21:59:44,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2022-03-19 21:59:44,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:44,399 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-03-19 21:59:44,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:44,399 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-03-19 21:59:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 21:59:44,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:44,400 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:44,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 21:59:44,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:44,601 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1594626654, now seen corresponding path program 2 times [2022-03-19 21:59:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:44,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102809193] [2022-03-19 21:59:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:44,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:44,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:44,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102809193] [2022-03-19 21:59:44,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102809193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:44,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736430070] [2022-03-19 21:59:44,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 21:59:44,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:44,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:44,946 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) [2022-03-19 21:59:44,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 21:59:44,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 21:59:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 21:59:44,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 21:59:44,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:03:49,585 WARN L232 SmtUtils]: Spent 3.70m on a formula simplification. DAG size of input: 20331 DAG size of output: 12419 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)