/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/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:14:45,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:14:45,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:14:45,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:14:45,718 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 22:14:45,738 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:14:45,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:14:45,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:14:45,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:14:45,739 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:14:45,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:14:45,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:14:45,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:14:45,740 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:14:45,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:14:45,741 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:14:45,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:14:45,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:14:45,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:14:45,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:14:45,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:14:45,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:14:45,742 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:14:45,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:14:45,742 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:14:45,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:14:45,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:14:45,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:14:45,743 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:14:45,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:14:45,744 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:14:45,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:14:45,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:14:45,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:14:45,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:14:45,944 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:14:45,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2022-03-19 22:14:45,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68667a35b/0bededac706c4b169fa450bfbbfb9c4c/FLAG627e9b72e [2022-03-19 22:14:46,344 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:14:46,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2022-03-19 22:14:46,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68667a35b/0bededac706c4b169fa450bfbbfb9c4c/FLAG627e9b72e [2022-03-19 22:14:46,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68667a35b/0bededac706c4b169fa450bfbbfb9c4c [2022-03-19 22:14:46,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:14:46,363 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:14:46,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:14:46,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:14:46,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:14:46,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3957fff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46, skipping insertion in model container [2022-03-19 22:14:46,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:14:46,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:14:46,494 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c[322,335] [2022-03-19 22:14:46,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:14:46,513 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:14:46,520 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c[322,335] [2022-03-19 22:14:46,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:14:46,530 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:14:46,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46 WrapperNode [2022-03-19 22:14:46,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:14:46,531 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:14:46,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:14:46,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:14:46,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:14:46,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:14:46,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:14:46,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:14:46,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (1/1) ... [2022-03-19 22:14:46,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:14:46,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:46,584 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 22:14:46,590 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 22:14:46,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:14:46,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:14:46,608 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:14:46,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:14:46,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:14:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:14:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:14:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:14:46,654 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:14:46,655 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:14:46,747 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:14:46,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:14:46,751 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 22:14:46,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:14:46 BoogieIcfgContainer [2022-03-19 22:14:46,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:14:46,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:14:46,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:14:46,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:14:46,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:14:46" (1/3) ... [2022-03-19 22:14:46,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a87f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:14:46, skipping insertion in model container [2022-03-19 22:14:46,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:14:46" (2/3) ... [2022-03-19 22:14:46,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a87f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:14:46, skipping insertion in model container [2022-03-19 22:14:46,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:14:46" (3/3) ... [2022-03-19 22:14:46,771 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2022-03-19 22:14:46,775 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:14:46,775 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:14:46,833 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:14:46,854 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 22:14:46,854 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:14:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 22:14:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 22:14:46,867 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:46,868 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:46,868 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:46,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2021311625, now seen corresponding path program 1 times [2022-03-19 22:14:46,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:46,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378765023] [2022-03-19 22:14:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:47,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:47,112 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 22:14:47,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:47,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378765023] [2022-03-19 22:14:47,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378765023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:14:47,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:14:47,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:14:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873182550] [2022-03-19 22:14:47,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:14:47,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:14:47,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:14:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:14:47,144 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 22:14:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:47,197 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2022-03-19 22:14:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:14:47,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 22:14:47,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:47,203 INFO L225 Difference]: With dead ends: 37 [2022-03-19 22:14:47,203 INFO L226 Difference]: Without dead ends: 17 [2022-03-19 22:14:47,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:14:47,211 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:47,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:14:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-19 22:14:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2022-03-19 22:14:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 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 22:14:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-19 22:14:47,236 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-19 22:14:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:47,236 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-19 22:14:47,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 22:14:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-19 22:14:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 22:14:47,237 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:47,237 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:47,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:14:47,238 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:47,238 INFO L85 PathProgramCache]: Analyzing trace with hash -2037585725, now seen corresponding path program 1 times [2022-03-19 22:14:47,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:47,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406759782] [2022-03-19 22:14:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:47,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:47,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:14:47,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:47,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406759782] [2022-03-19 22:14:47,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406759782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:14:47,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:14:47,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:14:47,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485641352] [2022-03-19 22:14:47,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:14:47,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:14:47,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:14:47,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:14:47,278 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 22:14:47,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:47,311 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-03-19 22:14:47,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:14:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2022-03-19 22:14:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:47,313 INFO L225 Difference]: With dead ends: 24 [2022-03-19 22:14:47,313 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 22:14:47,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 22:14:47,317 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:47,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:14:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 22:14:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-19 22:14:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 22:14:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-19 22:14:47,321 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-03-19 22:14:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:47,321 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-19 22:14:47,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 22:14:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-19 22:14:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 22:14:47,322 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:47,322 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:47,322 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 22:14:47,322 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash -183414982, now seen corresponding path program 1 times [2022-03-19 22:14:47,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:47,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869116086] [2022-03-19 22:14:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:47,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:47,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:14:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869116086] [2022-03-19 22:14:47,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869116086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:47,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226777478] [2022-03-19 22:14:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:47,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:47,382 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 22:14:47,394 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 22:14:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:47,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 22:14:47,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:14:47,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:14:47,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226777478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:47,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:47,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-19 22:14:47,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779550933] [2022-03-19 22:14:47,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:47,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 22:14:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 22:14:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-19 22:14:47,559 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:47,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:47,726 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-03-19 22:14:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 22:14:47,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 22:14:47,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:47,729 INFO L225 Difference]: With dead ends: 41 [2022-03-19 22:14:47,729 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 22:14:47,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-03-19 22:14:47,733 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:47,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 40 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:14:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 22:14:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-19 22:14:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 22:14:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-19 22:14:47,752 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2022-03-19 22:14:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:47,752 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-19 22:14:47,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-19 22:14:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 22:14:47,754 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:47,754 INFO L499 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:47,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 22:14:47,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:47,975 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1464546569, now seen corresponding path program 2 times [2022-03-19 22:14:47,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:47,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029971941] [2022-03-19 22:14:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:47,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:48,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:48,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 22:14:48,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:48,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029971941] [2022-03-19 22:14:48,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029971941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:48,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106059605] [2022-03-19 22:14:48,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:14:48,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:48,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:48,060 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 22:14:48,102 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 22:14:48,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:14:48,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:14:48,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 22:14:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 22:14:48,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 22:14:48,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106059605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:48,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:48,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-19 22:14:48,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113870597] [2022-03-19 22:14:48,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:48,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 22:14:48,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:48,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 22:14:48,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-03-19 22:14:48,318 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:48,445 INFO L93 Difference]: Finished difference Result 70 states and 93 transitions. [2022-03-19 22:14:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 22:14:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 22:14:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:48,447 INFO L225 Difference]: With dead ends: 70 [2022-03-19 22:14:48,447 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 22:14:48,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-03-19 22:14:48,448 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:48,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 41 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:14:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 22:14:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-19 22:14:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 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 22:14:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-03-19 22:14:48,456 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2022-03-19 22:14:48,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:48,456 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-03-19 22:14:48,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-03-19 22:14:48,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 22:14:48,458 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:48,458 INFO L499 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:48,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 22:14:48,675 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,SelfDestructingSolverStorable3 [2022-03-19 22:14:48,677 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash -886661367, now seen corresponding path program 3 times [2022-03-19 22:14:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:48,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596261846] [2022-03-19 22:14:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:48,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:48,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-03-19 22:14:48,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596261846] [2022-03-19 22:14:48,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596261846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97118213] [2022-03-19 22:14:48,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:14:48,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:48,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:48,803 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) [2022-03-19 22:14:48,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:14:48,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-19 22:14:48,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:14:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 22:14:48,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 22:14:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-03-19 22:14:49,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97118213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:49,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:49,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-19 22:14:49,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224710774] [2022-03-19 22:14:49,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:49,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 22:14:49,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 22:14:49,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-03-19 22:14:49,100 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:49,294 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2022-03-19 22:14:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 22:14:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-19 22:14:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:49,295 INFO L225 Difference]: With dead ends: 98 [2022-03-19 22:14:49,295 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 22:14:49,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2022-03-19 22:14:49,296 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:49,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:14:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 22:14:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-19 22:14:49,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 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 22:14:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-03-19 22:14:49,310 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 47 [2022-03-19 22:14:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:49,310 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-03-19 22:14:49,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:49,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-03-19 22:14:49,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 22:14:49,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:49,312 INFO L499 BasicCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:49,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:14:49,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:49,544 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 538347785, now seen corresponding path program 4 times [2022-03-19 22:14:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:49,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037995773] [2022-03-19 22:14:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:49,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:49,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 22:14:49,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:49,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037995773] [2022-03-19 22:14:49,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037995773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:49,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580607868] [2022-03-19 22:14:49,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:14:49,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:49,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:49,716 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) [2022-03-19 22:14:49,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:14:49,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:14:49,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:14:49,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 22:14:49,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 22:14:50,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 22:14:50,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580607868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:50,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:50,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 22:14:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929059109] [2022-03-19 22:14:50,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:50,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 22:14:50,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 22:14:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:14:50,146 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:50,435 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2022-03-19 22:14:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 22:14:50,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-19 22:14:50,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:50,436 INFO L225 Difference]: With dead ends: 147 [2022-03-19 22:14:50,436 INFO L226 Difference]: Without dead ends: 142 [2022-03-19 22:14:50,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2022-03-19 22:14:50,437 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:50,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 48 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:14:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-19 22:14:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-19 22:14:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 states have internal predecessors, (148), 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 22:14:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2022-03-19 22:14:50,463 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 63 [2022-03-19 22:14:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:50,464 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2022-03-19 22:14:50,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2022-03-19 22:14:50,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 22:14:50,471 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:50,471 INFO L499 BasicCegarLoop]: trace histogram [100, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:50,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:14:50,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:50,691 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1760569399, now seen corresponding path program 5 times [2022-03-19 22:14:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139856128] [2022-03-19 22:14:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:50,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:50,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-19 22:14:50,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139856128] [2022-03-19 22:14:50,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139856128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578908446] [2022-03-19 22:14:50,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:14:50,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:50,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:50,938 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:14:50,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:14:53,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-03-19 22:14:53,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:14:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 22:14:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:14:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-19 22:14:53,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:14:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6095 backedges. 0 proven. 5545 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-19 22:14:53,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578908446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:14:53,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:14:53,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-19 22:14:53,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609538105] [2022-03-19 22:14:53,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:14:53,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 22:14:53,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:14:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 22:14:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-03-19 22:14:53,857 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:14:58,785 INFO L93 Difference]: Finished difference Result 303 states and 336 transitions. [2022-03-19 22:14:58,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 22:14:58,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-03-19 22:14:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:14:58,787 INFO L225 Difference]: With dead ends: 303 [2022-03-19 22:14:58,787 INFO L226 Difference]: Without dead ends: 298 [2022-03-19 22:14:58,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 272 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=643, Invalid=1613, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 22:14:58,788 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:14:58,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 90 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 22:14:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-19 22:14:58,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2022-03-19 22:14:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.0784982935153584) internal successors, (316), 293 states have internal predecessors, (316), 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 22:14:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 320 transitions. [2022-03-19 22:14:58,817 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 320 transitions. Word has length 141 [2022-03-19 22:14:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:14:58,818 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 320 transitions. [2022-03-19 22:14:58,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:14:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 320 transitions. [2022-03-19 22:14:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-03-19 22:14:58,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:14:58,820 INFO L499 BasicCegarLoop]: trace histogram [220, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:14:58,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 22:14:59,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:59,026 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:14:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:14:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash -482736823, now seen corresponding path program 6 times [2022-03-19 22:14:59,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:14:59,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593000684] [2022-03-19 22:14:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:14:59,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:14:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:59,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:14:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:14:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 0 proven. 28435 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2022-03-19 22:14:59,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:14:59,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593000684] [2022-03-19 22:14:59,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593000684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:14:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997202054] [2022-03-19 22:14:59,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:14:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:14:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:14:59,612 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:14:59,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:15:00,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-19 22:15:00,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:15:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 22:15:00,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:15:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 29645 backedges. 2584 proven. 0 refuted. 0 times theorem prover too weak. 27061 trivial. 0 not checked. [2022-03-19 22:15:01,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 22:15:01,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997202054] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:15:01,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 22:15:01,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [26] total 31 [2022-03-19 22:15:01,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815926510] [2022-03-19 22:15:01,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:15:01,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 22:15:01,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:15:01,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 22:15:01,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-03-19 22:15:01,150 INFO L87 Difference]: Start difference. First operand 298 states and 320 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-03-19 22:15:01,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:15:01,219 INFO L93 Difference]: Finished difference Result 298 states and 320 transitions. [2022-03-19 22:15:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 22:15:01,219 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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 297 [2022-03-19 22:15:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:15:01,220 INFO L225 Difference]: With dead ends: 298 [2022-03-19 22:15:01,220 INFO L226 Difference]: Without dead ends: 0 [2022-03-19 22:15:01,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2022-03-19 22:15:01,224 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:15:01,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-03-19 22:15:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-19 22:15:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-19 22:15:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-19 22:15:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-19 22:15:01,225 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 297 [2022-03-19 22:15:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:15:01,225 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-19 22:15:01,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-03-19 22:15:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-19 22:15:01,225 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-19 22:15:01,228 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-19 22:15:01,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 22:15:01,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:15:01,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-19 22:15:05,503 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-03-19 22:15:05,503 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-03-19 22:15:05,503 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-03-19 22:15:05,503 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-19 22:15:05,504 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-19 22:15:05,504 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-19 22:15:05,504 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-19 22:15:05,504 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-19 22:15:05,504 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-19 22:15:05,504 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-19 22:15:05,504 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2022-03-19 22:15:05,504 INFO L878 garLoopResultBuilder]: At program point L19-2(lines 19 21) the Hoare annotation is: (or (= main_~x~0 0) (and (< (mod main_~x~0 4294967296) 268435455) (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455))) [2022-03-19 22:15:05,504 INFO L882 garLoopResultBuilder]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2022-03-19 22:15:05,504 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2022-03-19 22:15:05,504 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2022-03-19 22:15:05,504 INFO L878 garLoopResultBuilder]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (and (= main_~x~0 0) (= main_~y~0 0)) (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455)) [2022-03-19 22:15:05,504 INFO L878 garLoopResultBuilder]: At program point L16-3(lines 16 24) the Hoare annotation is: (and (not (< (mod main_~x~0 4294967296) 268435455)) (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455)) [2022-03-19 22:15:05,505 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-03-19 22:15:05,505 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2022-03-19 22:15:05,505 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-19 22:15:05,505 INFO L882 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-03-19 22:15:05,505 INFO L882 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2022-03-19 22:15:05,505 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-03-19 22:15:05,507 INFO L719 BasicCegarLoop]: Path program histogram: [6, 1, 1] [2022-03-19 22:15:05,508 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-19 22:15:05,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.03 10:15:05 BoogieIcfgContainer [2022-03-19 22:15:05,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-19 22:15:05,516 INFO L158 Benchmark]: Toolchain (without parser) took 19152.71ms. Allocated memory was 189.8MB in the beginning and 350.2MB in the end (delta: 160.4MB). Free memory was 133.4MB in the beginning and 275.1MB in the end (delta: -141.7MB). Peak memory consumption was 159.5MB. Max. memory is 8.0GB. [2022-03-19 22:15:05,516 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 189.8MB. Free memory is still 149.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-19 22:15:05,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.79ms. Allocated memory was 189.8MB in the beginning and 242.2MB in the end (delta: 52.4MB). Free memory was 133.3MB in the beginning and 212.1MB in the end (delta: -78.8MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. [2022-03-19 22:15:05,517 INFO L158 Benchmark]: Boogie Preprocessor took 15.77ms. Allocated memory is still 242.2MB. Free memory was 212.1MB in the beginning and 210.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-19 22:15:05,517 INFO L158 Benchmark]: RCFGBuilder took 204.59ms. Allocated memory is still 242.2MB. Free memory was 210.5MB in the beginning and 200.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-19 22:15:05,517 INFO L158 Benchmark]: TraceAbstraction took 18762.36ms. Allocated memory was 242.2MB in the beginning and 350.2MB in the end (delta: 108.0MB). Free memory was 199.5MB in the beginning and 275.1MB in the end (delta: -75.6MB). Peak memory consumption was 175.1MB. Max. memory is 8.0GB. [2022-03-19 22:15:05,518 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 189.8MB. Free memory is still 149.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 165.79ms. Allocated memory was 189.8MB in the beginning and 242.2MB in the end (delta: 52.4MB). Free memory was 133.3MB in the beginning and 212.1MB in the end (delta: -78.8MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.77ms. Allocated memory is still 242.2MB. Free memory was 212.1MB in the beginning and 210.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 204.59ms. Allocated memory is still 242.2MB. Free memory was 210.5MB in the beginning and 200.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 18762.36ms. Allocated memory was 242.2MB in the beginning and 350.2MB in the end (delta: 108.0MB). Free memory was 199.5MB in the beginning and 275.1MB in the end (delta: -75.6MB). Peak memory consumption was 175.1MB. 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 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.7s, OverallIterations: 8, TraceHistogramMax: 220, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 303 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 302 mSDsluCounter, 366 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11 IncrementalHoareTripleChecker+Unchecked, 228 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 966 IncrementalHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 138 mSDtfsCounter, 966 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1040 GetRequests, 873 SyntacticMatches, 4 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred in iteration=7, InterpolantAutomatonStates: 91, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 281 NumberOfFragments, 57 HoareAnnotationTreeSize, 15 FomulaSimplifications, 97 FormulaSimplificationTreeSizeReduction, 2.4s HoareSimplificationTime, 8 FomulaSimplificationsInter, 7661 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 1213 NumberOfCodeBlocks, 972 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 1491 ConstructedInterpolants, 2 QuantifiedInterpolants, 6674 SizeOfPredicates, 7 NumberOfNonLiveVariables, 1101 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 34525/81896 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (x == 0 && y == 0) || (x + 4294967295) % 4294967296 < 268435455 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: x == 0 || (x % 4294967296 < 268435455 && (x + 4294967295) % 4294967296 < 268435455) RESULT: Ultimate proved your program to be correct! [2022-03-19 22:15:05,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...