/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:31:58,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:31:58,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:31:58,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:31:58,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:31:58,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:31:58,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:31:58,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:31:58,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:31:58,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:31:58,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:31:58,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:31:58,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:31:58,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:31:58,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:31:58,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:31:58,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:31:58,396 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:31:58,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:31:58,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:31:58,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:31:58,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:31:58,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:31:58,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:31:58,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:31:58,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:31:58,398 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:31:58,398 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:31:58,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:31:58,398 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:31:58,398 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:31:58,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:31:58,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:31:58,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:31:58,665 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:31:58,666 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:31:58,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+lhb-reducer.c [2022-03-20 18:31:58,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/495b7ede6/72f93728939c438db88714149ed5b524/FLAG223f9b864 [2022-03-20 18:31:59,137 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:31:59,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c.v+lhb-reducer.c [2022-03-20 18:31:59,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/495b7ede6/72f93728939c438db88714149ed5b524/FLAG223f9b864 [2022-03-20 18:31:59,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/495b7ede6/72f93728939c438db88714149ed5b524 [2022-03-20 18:31:59,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:31:59,548 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:31:59,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:31:59,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:31:59,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:31:59,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e09debd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59, skipping insertion in model container [2022-03-20 18:31:59,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:31:59,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:31:59,727 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-industry-pattern/mod3.c.v+lhb-reducer.c[2265,2278] [2022-03-20 18:31:59,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:31:59,739 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:31:59,758 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-industry-pattern/mod3.c.v+lhb-reducer.c[2265,2278] [2022-03-20 18:31:59,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:31:59,776 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:31:59,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59 WrapperNode [2022-03-20 18:31:59,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:31:59,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:31:59,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:31:59,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:31:59,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:31:59,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:31:59,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:31:59,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:31:59,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (1/1) ... [2022-03-20 18:31:59,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:31:59,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:59,831 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) [2022-03-20 18:31:59,843 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 [2022-03-20 18:31:59,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:31:59,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:31:59,862 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:31:59,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:31:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:31:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:31:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:31:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:31:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:31:59,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:31:59,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:31:59,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:31:59,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:31:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:31:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:31:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:31:59,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:31:59,916 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:31:59,917 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:32:08,731 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:32:08,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:32:08,739 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-20 18:32:08,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:32:08 BoogieIcfgContainer [2022-03-20 18:32:08,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:32:08,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:32:08,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:32:08,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:32:08,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:31:59" (1/3) ... [2022-03-20 18:32:08,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f86a383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:32:08, skipping insertion in model container [2022-03-20 18:32:08,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:59" (2/3) ... [2022-03-20 18:32:08,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f86a383 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:32:08, skipping insertion in model container [2022-03-20 18:32:08,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:32:08" (3/3) ... [2022-03-20 18:32:08,748 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c.v+lhb-reducer.c [2022-03-20 18:32:08,754 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:32:08,755 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:32:08,786 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:32:08,791 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:32:08,791 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:32:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:32:08,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 18:32:08,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:08,809 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:08,810 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1261463571, now seen corresponding path program 1 times [2022-03-20 18:32:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:08,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857393714] [2022-03-20 18:32:08,831 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:32:08,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1261463571, now seen corresponding path program 2 times [2022-03-20 18:32:08,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:08,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164612439] [2022-03-20 18:32:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:09,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:09,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:09,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164612439] [2022-03-20 18:32:09,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164612439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:09,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:09,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:32:09,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:09,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [857393714] [2022-03-20 18:32:09,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [857393714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:09,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:09,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:32:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081508776] [2022-03-20 18:32:09,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:09,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 18:32:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:09,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 18:32:09,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:32:09,552 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:11,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:13,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:16,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:18,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:20,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:22,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:24,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:27,018 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:29,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:31,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:33,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:35,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:37,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:40,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:42,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:42,308 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2022-03-20 18:32:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 18:32:42,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 18:32:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:42,472 INFO L225 Difference]: With dead ends: 71 [2022-03-20 18:32:42,472 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 18:32:42,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:32:42,478 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:42,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 95 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 15 Unknown, 0 Unchecked, 32.4s Time] [2022-03-20 18:32:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 18:32:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-03-20 18:32:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-03-20 18:32:42,516 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2022-03-20 18:32:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:42,517 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-03-20 18:32:42,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-03-20 18:32:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 18:32:42,518 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:42,518 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:42,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:32:42,519 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash 489359351, now seen corresponding path program 1 times [2022-03-20 18:32:42,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:42,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769987717] [2022-03-20 18:32:42,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:32:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash 489359351, now seen corresponding path program 2 times [2022-03-20 18:32:42,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:42,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113034080] [2022-03-20 18:32:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:42,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113034080] [2022-03-20 18:32:42,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113034080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:42,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:42,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:32:42,991 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769987717] [2022-03-20 18:32:42,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769987717] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:42,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:42,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:32:42,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771579944] [2022-03-20 18:32:42,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:42,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 18:32:42,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 18:32:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:32:42,996 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:45,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:47,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.78s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:50,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:52,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:54,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:56,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:32:58,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:01,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:03,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:05,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:07,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:09,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:11,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:14,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:16,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:18,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:20,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:22,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:22,927 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2022-03-20 18:33:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 18:33:22,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 18:33:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:22,928 INFO L225 Difference]: With dead ends: 60 [2022-03-20 18:33:22,928 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 18:33:22,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:33:22,930 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:22,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 80 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 18 Unknown, 0 Unchecked, 39.8s Time] [2022-03-20 18:33:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 18:33:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-03-20 18:33:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-03-20 18:33:22,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 16 [2022-03-20 18:33:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:22,940 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-03-20 18:33:22,940 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-03-20 18:33:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 18:33:22,941 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:22,941 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:22,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:33:22,941 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:22,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash 7180197, now seen corresponding path program 1 times [2022-03-20 18:33:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:22,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [567312754] [2022-03-20 18:33:22,943 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:33:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash 7180197, now seen corresponding path program 2 times [2022-03-20 18:33:22,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:22,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979297919] [2022-03-20 18:33:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:23,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 18:33:23,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:23,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979297919] [2022-03-20 18:33:23,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979297919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:23,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:23,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:33:23,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:23,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [567312754] [2022-03-20 18:33:23,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [567312754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:23,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:23,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:33:23,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001196880] [2022-03-20 18:33:23,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:23,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 18:33:23,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:23,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 18:33:23,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:33:23,096 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:25,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:27,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:29,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:31,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:33,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:35,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:38,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:40,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:42,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:44,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:46,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:49,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:51,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:51,439 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2022-03-20 18:33:51,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 18:33:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 18:33:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:51,440 INFO L225 Difference]: With dead ends: 65 [2022-03-20 18:33:51,441 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 18:33:51,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:33:51,442 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:51,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 28.3s Time] [2022-03-20 18:33:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 18:33:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2022-03-20 18:33:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-03-20 18:33:51,457 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 21 [2022-03-20 18:33:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:51,458 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-03-20 18:33:51,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-03-20 18:33:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 18:33:51,459 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:51,459 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:51,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 18:33:51,459 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash 261280421, now seen corresponding path program 1 times [2022-03-20 18:33:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:51,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [159220606] [2022-03-20 18:33:51,461 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:33:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 261280421, now seen corresponding path program 2 times [2022-03-20 18:33:51,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:51,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757855359] [2022-03-20 18:33:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:51,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:51,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 18:33:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757855359] [2022-03-20 18:33:51,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757855359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:51,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:51,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:33:51,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:51,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [159220606] [2022-03-20 18:33:51,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [159220606] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:51,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:51,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:33:51,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022852410] [2022-03-20 18:33:51,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:51,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 18:33:51,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:51,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 18:33:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:33:51,674 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:53,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:55,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:33:58,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:34:00,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:34:02,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:34:04,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:34:06,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:34:08,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:34:11,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-20 18:34:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:11,390 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-03-20 18:34:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 18:34:11,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 18:34:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:11,392 INFO L225 Difference]: With dead ends: 59 [2022-03-20 18:34:11,392 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 18:34:11,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:34:11,393 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:34:11,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 19.7s Time] [2022-03-20 18:34:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 18:34:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 18:34:11,394 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) [2022-03-20 18:34:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 18:34:11,395 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2022-03-20 18:34:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:11,395 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 18:34:11,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:11,395 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 18:34:11,395 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 18:34:11,397 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 18:34:11,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 18:34:11,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 18:34:11,517 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2022-03-20 18:34:11,517 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2022-03-20 18:34:11,517 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2022-03-20 18:34:11,517 INFO L878 garLoopResultBuilder]: At program point L97(lines 97 106) the Hoare annotation is: (and (not (= main_~__VERIFIER_assert__cond~0 0)) (<= main_~main__x~0 (let ((.cse0 (div main_~main__x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ .cse2 main_~main__x~0) 3))) (+ (* .cse0 4294967296) (* 3 .cse1) (* (div (+ .cse2 (* (- 3) .cse1) main_~main__x~0) 4294967296) 4294967296))))))) [2022-03-20 18:34:11,517 INFO L878 garLoopResultBuilder]: At program point L122(lines 25 145) the Hoare annotation is: (<= main_~main__x~0 (let ((.cse0 (div main_~main__x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ .cse2 main_~main__x~0) 3))) (+ (* .cse0 4294967296) (* 3 .cse1) (* (div (+ .cse2 (* (- 3) .cse1) main_~main__x~0) 4294967296) 4294967296)))))) [2022-03-20 18:34:11,517 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 16 151) the Hoare annotation is: true [2022-03-20 18:34:11,518 INFO L878 garLoopResultBuilder]: At program point L56(lines 26 114) the Hoare annotation is: (<= main_~main__x~0 (let ((.cse0 (div main_~main__x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ .cse2 main_~main__x~0) 3))) (+ (* .cse0 4294967296) (* 3 .cse1) (* (div (+ .cse2 (* (- 3) .cse1) main_~main__x~0) 4294967296) 4294967296)))))) [2022-03-20 18:34:11,518 INFO L885 garLoopResultBuilder]: At program point L23(lines 23 150) the Hoare annotation is: true [2022-03-20 18:34:11,518 INFO L878 garLoopResultBuilder]: At program point L48(lines 48 85) the Hoare annotation is: (<= main_~main__x~0 (let ((.cse0 (div main_~main__x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ .cse2 main_~main__x~0) 3))) (+ (* .cse0 4294967296) (* 3 .cse1) (* (div (+ .cse2 (* (- 3) .cse1) main_~main__x~0) 4294967296) 4294967296)))))) [2022-03-20 18:34:11,518 INFO L878 garLoopResultBuilder]: At program point L44(lines 26 114) the Hoare annotation is: (<= main_~main__x~0 (let ((.cse0 (div main_~main__x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ .cse2 main_~main__x~0) 3))) (+ (* .cse0 4294967296) (* 3 .cse1) (* (div (+ .cse2 (* (- 3) .cse1) main_~main__x~0) 4294967296) 4294967296)))))) [2022-03-20 18:34:11,518 INFO L878 garLoopResultBuilder]: At program point L90(lines 90 112) the Hoare annotation is: (<= main_~main__x~0 (let ((.cse0 (div main_~main__x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ .cse2 main_~main__x~0) 3))) (+ (* .cse0 4294967296) (* 3 .cse1) (* (div (+ .cse2 (* (- 3) .cse1) main_~main__x~0) 4294967296) 4294967296)))))) [2022-03-20 18:34:11,518 INFO L878 garLoopResultBuilder]: At program point L37(lines 37 113) the Hoare annotation is: (<= main_~main__x~0 (let ((.cse0 (div main_~main__x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ .cse2 main_~main__x~0) 3))) (+ (* .cse0 4294967296) (* 3 .cse1) (* (div (+ .cse2 (* (- 3) .cse1) main_~main__x~0) 4294967296) 4294967296)))))) [2022-03-20 18:34:11,519 INFO L878 garLoopResultBuilder]: At program point L99(line 99) the Hoare annotation is: false [2022-03-20 18:34:11,519 INFO L885 garLoopResultBuilder]: At program point L128(lines 128 143) the Hoare annotation is: true [2022-03-20 18:34:11,519 INFO L885 garLoopResultBuilder]: At program point L62(lines 62 84) the Hoare annotation is: true [2022-03-20 18:34:11,519 INFO L885 garLoopResultBuilder]: At program point L25(lines 25 145) the Hoare annotation is: true [2022-03-20 18:34:11,519 INFO L885 garLoopResultBuilder]: At program point L83(lines 17 151) the Hoare annotation is: true [2022-03-20 18:34:11,519 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 16 151) the Hoare annotation is: true [2022-03-20 18:34:11,519 INFO L878 garLoopResultBuilder]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 99) the Hoare annotation is: false [2022-03-20 18:34:11,519 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 16 151) the Hoare annotation is: (and (= ~__tmp_91_0~0 |old(~__tmp_91_0~0)|) (= ~__tmp_91_1~0 |old(~__tmp_91_1~0)|) (= ~__tmp_88_1~0 |old(~__tmp_88_1~0)|) (= ~__tmp_94_0~0 |old(~__tmp_94_0~0)|) (= ~__tmp_88_0~0 |old(~__tmp_88_0~0)|) (= |old(~__tmp_112_0~0)| ~__tmp_112_0~0) (= |old(~__return_121~0)| ~__return_121~0) (= ~__tmp_93_0~0 |old(~__tmp_93_0~0)|)) [2022-03-20 18:34:11,520 INFO L885 garLoopResultBuilder]: At program point L117(lines 117 144) the Hoare annotation is: true [2022-03-20 18:34:11,520 INFO L885 garLoopResultBuilder]: At program point L142(lines 25 145) the Hoare annotation is: true [2022-03-20 18:34:11,520 INFO L878 garLoopResultBuilder]: At program point L39(lines 39 86) the Hoare annotation is: (<= main_~main__x~0 (let ((.cse0 (div main_~main__x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ .cse2 main_~main__x~0) 3))) (+ (* .cse0 4294967296) (* 3 .cse1) (* (div (+ .cse2 (* (- 3) .cse1) main_~main__x~0) 4294967296) 4294967296)))))) [2022-03-20 18:34:11,520 INFO L885 garLoopResultBuilder]: At program point L134(lines 25 145) the Hoare annotation is: true [2022-03-20 18:34:11,520 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-03-20 18:34:11,520 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__tmp_91_0~0 |old(~__tmp_91_0~0)|) (= ~__tmp_91_1~0 |old(~__tmp_91_1~0)|) (= ~__return_main~0 |old(~__return_main~0)|) (= ~__tmp_88_1~0 |old(~__tmp_88_1~0)|) (= ~__tmp_94_0~0 |old(~__tmp_94_0~0)|) (= ~__tmp_88_0~0 |old(~__tmp_88_0~0)|) (= |old(~__tmp_112_0~0)| ~__tmp_112_0~0) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(~__return_121~0)| ~__return_121~0) (= ~__tmp_93_0~0 |old(~__tmp_93_0~0)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 18:34:11,520 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-03-20 18:34:11,521 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 18:34:11,521 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 18:34:11,521 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 18:34:11,521 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 18:34:11,524 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2] [2022-03-20 18:34:11,525 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 18:34:11,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:34:11 BoogieIcfgContainer [2022-03-20 18:34:11,538 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 18:34:11,539 INFO L158 Benchmark]: Toolchain (without parser) took 131990.65ms. Allocated memory is still 191.9MB. Free memory was 143.1MB in the beginning and 155.8MB in the end (delta: -12.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 18:34:11,539 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 191.9MB. Free memory is still 159.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 18:34:11,540 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.77ms. Allocated memory is still 191.9MB. Free memory was 142.9MB in the beginning and 168.9MB in the end (delta: -26.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 18:34:11,540 INFO L158 Benchmark]: Boogie Preprocessor took 22.13ms. Allocated memory is still 191.9MB. Free memory was 168.9MB in the beginning and 167.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 18:34:11,540 INFO L158 Benchmark]: RCFGBuilder took 8941.81ms. Allocated memory is still 191.9MB. Free memory was 167.3MB in the beginning and 155.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 18:34:11,540 INFO L158 Benchmark]: TraceAbstraction took 122796.26ms. Allocated memory is still 191.9MB. Free memory was 155.1MB in the beginning and 155.8MB in the end (delta: -665.3kB). Peak memory consumption was 303.8kB. Max. memory is 8.0GB. [2022-03-20 18:34:11,542 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 191.9MB. Free memory is still 159.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.77ms. Allocated memory is still 191.9MB. Free memory was 142.9MB in the beginning and 168.9MB in the end (delta: -26.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.13ms. Allocated memory is still 191.9MB. Free memory was 168.9MB in the beginning and 167.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 8941.81ms. Allocated memory is still 191.9MB. Free memory was 167.3MB in the beginning and 155.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 122796.26ms. Allocated memory is still 191.9MB. Free memory was 155.1MB in the beginning and 155.8MB in the end (delta: -665.3kB). Peak memory consumption was 303.8kB. 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: 99]: 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 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 122.7s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 121.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 55 mSolverCounterUnknown, 48 SdHoareTripleChecker+Valid, 120.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48 mSDsluCounter, 289 SdHoareTripleChecker+Invalid, 111.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 185 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 242 IncrementalHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 104 mSDtfsCounter, 242 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=2, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 20 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 28 PreInvPairs, 61 NumberOfFragments, 410 HoareAnnotationTreeSize, 28 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 28 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: main__x <= main__x / 4294967296 * 4294967296 + 3 * ((main__x / 4294967296 * -4294967296 + main__x) / 3) + (main__x / 4294967296 * -4294967296 + -3 * ((main__x / 4294967296 * -4294967296 + main__x) / 3) + main__x) / 4294967296 * 4294967296 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: main__x <= main__x / 4294967296 * 4294967296 + 3 * ((main__x / 4294967296 * -4294967296 + main__x) / 3) + (main__x / 4294967296 * -4294967296 + -3 * ((main__x / 4294967296 * -4294967296 + main__x) / 3) + main__x) / 4294967296 * 4294967296 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: main__x <= main__x / 4294967296 * 4294967296 + 3 * ((main__x / 4294967296 * -4294967296 + main__x) / 3) + (main__x / 4294967296 * -4294967296 + -3 * ((main__x / 4294967296 * -4294967296 + main__x) / 3) + main__x) / 4294967296 * 4294967296 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - ProcedureContractResult [Line: 16]: Procedure Contract for main Derived contract for procedure main: 1 RESULT: Ultimate proved your program to be correct! [2022-03-20 18:34:11,572 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...