/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:13:08,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:13:08,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:13:08,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:13:08,209 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 23:13:08,222 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:13:08,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:13:08,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:13:08,222 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:13:08,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:13:08,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:13:08,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:13:08,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:13:08,230 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:13:08,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:13:08,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:13:08,232 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:13:08,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:13:08,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:13:08,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:13:08,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:13:08,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:13:08,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:13:08,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:13:08,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:13:08,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:13:08,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:13:08,233 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:13:08,233 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:13:08,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:13:08,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:13:08,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:13:08,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:13:08,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:13:08,442 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:13:08,442 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:13:08,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-03-19 23:13:08,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ee8871cc/68f24596cbcf4d15b25229c60f01e06c/FLAG223572f1a [2022-03-19 23:13:08,834 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:13:08,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-03-19 23:13:08,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ee8871cc/68f24596cbcf4d15b25229c60f01e06c/FLAG223572f1a [2022-03-19 23:13:09,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ee8871cc/68f24596cbcf4d15b25229c60f01e06c [2022-03-19 23:13:09,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:13:09,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:13:09,286 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:13:09,286 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:13:09,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:13:09,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc3b4ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09, skipping insertion in model container [2022-03-19 23:13:09,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:13:09,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:13:09,425 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2022-03-19 23:13:09,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:13:09,463 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:13:09,473 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2022-03-19 23:13:09,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:13:09,489 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:13:09,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09 WrapperNode [2022-03-19 23:13:09,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:13:09,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:13:09,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:13:09,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:13:09,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:13:09,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:13:09,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:13:09,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:13:09,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (1/1) ... [2022-03-19 23:13:09,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:13:09,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:09,549 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 23:13:09,555 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 23:13:09,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:13:09,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:13:09,581 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:13:09,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 23:13:09,582 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:13:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 23:13:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:13:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:13:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:13:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 23:13:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:13:09,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:13:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:13:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:13:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:13:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:13:09,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:13:09,634 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:13:09,635 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:13:09,775 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:13:09,779 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:13:09,779 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-19 23:13:09,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:13:09 BoogieIcfgContainer [2022-03-19 23:13:09,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:13:09,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:13:09,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:13:09,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:13:09,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:13:09" (1/3) ... [2022-03-19 23:13:09,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ac90d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:13:09, skipping insertion in model container [2022-03-19 23:13:09,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:13:09" (2/3) ... [2022-03-19 23:13:09,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26ac90d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:13:09, skipping insertion in model container [2022-03-19 23:13:09,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:13:09" (3/3) ... [2022-03-19 23:13:09,786 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2022-03-19 23:13:09,789 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:13:09,790 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:13:09,820 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:13:09,825 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 23:13:09,825 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:13:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 23:13:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:13:09,853 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:09,854 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:09,854 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2022-03-19 23:13:09,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:09,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117385868] [2022-03-19 23:13:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:09,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,010 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 23:13:10,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:10,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117385868] [2022-03-19 23:13:10,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117385868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:13:10,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:13:10,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 23:13:10,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975157546] [2022-03-19 23:13:10,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:13:10,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 23:13:10,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 23:13:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:13:10,040 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 23:13:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:10,090 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-03-19 23:13:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 23:13:10,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 23:13:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:10,097 INFO L225 Difference]: With dead ends: 44 [2022-03-19 23:13:10,097 INFO L226 Difference]: Without dead ends: 20 [2022-03-19 23:13:10,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 23:13:10,105 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:10,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:13:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-19 23:13:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-19 23:13:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:13:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-19 23:13:10,135 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-03-19 23:13:10,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:10,136 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-19 23:13:10,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 23:13:10,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-19 23:13:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:13:10,137 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:10,137 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:10,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:13:10,138 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2022-03-19 23:13:10,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:10,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406094362] [2022-03-19 23:13:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:10,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,244 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 23:13:10,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:10,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406094362] [2022-03-19 23:13:10,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406094362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:13:10,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:13:10,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:13:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429654493] [2022-03-19 23:13:10,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:13:10,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:13:10,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:13:10,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:13:10,249 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. 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 23:13:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:10,329 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-19 23:13:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:13:10,330 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 23:13:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:10,331 INFO L225 Difference]: With dead ends: 34 [2022-03-19 23:13:10,331 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 23:13:10,331 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 23:13:10,332 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:10,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:13:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 23:13:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-03-19 23:13:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:13:10,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-19 23:13:10,338 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-03-19 23:13:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:10,338 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-19 23:13:10,338 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 23:13:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-19 23:13:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 23:13:10,339 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:10,339 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:10,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:13:10,339 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:10,340 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2022-03-19 23:13:10,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:10,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152333498] [2022-03-19 23:13:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:10,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,426 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 23:13:10,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:10,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152333498] [2022-03-19 23:13:10,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152333498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:13:10,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:13:10,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:13:10,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808474322] [2022-03-19 23:13:10,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:13:10,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:13:10,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:10,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:13:10,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:13:10,430 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 23:13:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:10,484 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-03-19 23:13:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:13:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-03-19 23:13:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:10,487 INFO L225 Difference]: With dead ends: 39 [2022-03-19 23:13:10,487 INFO L226 Difference]: Without dead ends: 25 [2022-03-19 23:13:10,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 23:13:10,494 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:10,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:13:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-19 23:13:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-03-19 23:13:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:13:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-03-19 23:13:10,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-03-19 23:13:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:10,510 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-03-19 23:13:10,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 23:13:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-03-19 23:13:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 23:13:10,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:10,511 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:10,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 23:13:10,511 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:10,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2022-03-19 23:13:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:10,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956863665] [2022-03-19 23:13:10,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:10,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,581 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 23:13:10,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956863665] [2022-03-19 23:13:10,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956863665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:13:10,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:13:10,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:13:10,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163636110] [2022-03-19 23:13:10,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:13:10,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:13:10,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:10,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:13:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:13:10,584 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 23:13:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:10,639 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-03-19 23:13:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:13:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-03-19 23:13:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:10,642 INFO L225 Difference]: With dead ends: 39 [2022-03-19 23:13:10,642 INFO L226 Difference]: Without dead ends: 24 [2022-03-19 23:13:10,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 23:13:10,651 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:10,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:13:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-19 23:13:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-19 23:13:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:13:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-19 23:13:10,659 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-03-19 23:13:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:10,659 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-19 23:13:10,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 23:13:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-19 23:13:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 23:13:10,660 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:10,661 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:10,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-19 23:13:10,661 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:10,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:10,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2022-03-19 23:13:10,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:10,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910338518] [2022-03-19 23:13:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:10,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:13:10,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910338518] [2022-03-19 23:13:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910338518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346333488] [2022-03-19 23:13:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:10,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:10,756 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 23:13:10,757 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 23:13:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:10,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:13:10,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:13:10,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:13:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:13:10,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346333488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:13:10,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:13:10,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 23:13:10,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757360267] [2022-03-19 23:13:10,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:13:10,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:13:10,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:13:10,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:13:10,909 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 23:13:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:11,047 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-03-19 23:13:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 23:13:11,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 14 [2022-03-19 23:13:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:11,048 INFO L225 Difference]: With dead ends: 43 [2022-03-19 23:13:11,048 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 23:13:11,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:13:11,049 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:11,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:13:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 23:13:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-19 23:13:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:13:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-03-19 23:13:11,054 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2022-03-19 23:13:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:11,054 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-03-19 23:13:11,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 23:13:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-03-19 23:13:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 23:13:11,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:11,055 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:11,072 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 23:13:11,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:11,260 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:11,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:11,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1938664258, now seen corresponding path program 2 times [2022-03-19 23:13:11,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:11,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421777304] [2022-03-19 23:13:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:11,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:11,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:13:11,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:11,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421777304] [2022-03-19 23:13:11,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421777304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:11,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116687101] [2022-03-19 23:13:11,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:13:11,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:11,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:11,378 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 23:13:11,379 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 23:13:11,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:13:11,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:13:11,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 23:13:11,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:13:11,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:13:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:13:11,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116687101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:13:11,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:13:11,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 23:13:11,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273862165] [2022-03-19 23:13:11,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:13:11,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 23:13:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:11,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 23:13:11,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:13:11,583 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 23:13:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:11,954 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-03-19 23:13:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 23:13:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 17 [2022-03-19 23:13:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:11,955 INFO L225 Difference]: With dead ends: 52 [2022-03-19 23:13:11,955 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 23:13:11,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:13:11,956 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:11,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 53 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:13:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 23:13:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-19 23:13:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:13:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-19 23:13:11,962 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17 [2022-03-19 23:13:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:11,962 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-19 23:13:11,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 23:13:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-19 23:13:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 23:13:11,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:11,963 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:11,980 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 23:13:12,179 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,SelfDestructingSolverStorable5 [2022-03-19 23:13:12,180 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:12,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1655539902, now seen corresponding path program 3 times [2022-03-19 23:13:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:12,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808682389] [2022-03-19 23:13:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:12,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:13:12,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808682389] [2022-03-19 23:13:12,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808682389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147879373] [2022-03-19 23:13:12,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:13:12,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:12,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:12,359 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 23:13:12,359 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 23:13:12,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 23:13:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:13:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:13:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 23:13:12,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:13:12,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147879373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:13:12,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:13:12,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-03-19 23:13:12,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752511725] [2022-03-19 23:13:12,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:13:12,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 23:13:12,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 23:13:12,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:13:12,761 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 23:13:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:12,775 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-03-19 23:13:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:13:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 23 [2022-03-19 23:13:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:12,777 INFO L225 Difference]: With dead ends: 37 [2022-03-19 23:13:12,777 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 23:13:12,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:13:12,777 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:12,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 89 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2022-03-19 23:13:12,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 23:13:12,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-19 23:13:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 23:13:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-19 23:13:12,783 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2022-03-19 23:13:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:12,783 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-19 23:13:12,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 23:13:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-19 23:13:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 23:13:12,784 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:12,784 INFO L499 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:12,813 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 23:13:12,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:12,985 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:12,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:12,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830046, now seen corresponding path program 1 times [2022-03-19 23:13:12,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:12,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051509595] [2022-03-19 23:13:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:12,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:13,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:13,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 23:13:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:13:13,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051509595] [2022-03-19 23:13:13,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051509595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:13,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741107748] [2022-03-19 23:13:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:13,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:13,188 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 23:13:13,189 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 23:13:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:13,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:13:13,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:13:13,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:13:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-19 23:13:13,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741107748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:13:13,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:13:13,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 22 [2022-03-19 23:13:13,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045059768] [2022-03-19 23:13:13,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:13:13,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 23:13:13,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 23:13:13,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-03-19 23:13:13,439 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 23:13:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:14,511 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-03-19 23:13:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-19 23:13:14,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-03-19 23:13:14,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:14,513 INFO L225 Difference]: With dead ends: 108 [2022-03-19 23:13:14,513 INFO L226 Difference]: Without dead ends: 81 [2022-03-19 23:13:14,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=776, Invalid=4194, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 23:13:14,515 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:14,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:13:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-19 23:13:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-19 23:13:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 23:13:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2022-03-19 23:13:14,532 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 30 [2022-03-19 23:13:14,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:14,532 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2022-03-19 23:13:14,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 23:13:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2022-03-19 23:13:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-19 23:13:14,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:14,534 INFO L499 BasicCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:14,558 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 23:13:14,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:14,755 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:14,756 INFO L85 PathProgramCache]: Analyzing trace with hash 591428512, now seen corresponding path program 2 times [2022-03-19 23:13:14,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:14,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203157048] [2022-03-19 23:13:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:14,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:14,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:14,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 23:13:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:14,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 23:13:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:14,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 23:13:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:15,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 23:13:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-03-19 23:13:15,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203157048] [2022-03-19 23:13:15,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203157048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:15,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011227460] [2022-03-19 23:13:15,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:13:15,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:15,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:15,014 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 23:13:15,063 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 23:13:15,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:13:15,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:13:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 23:13:15,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-03-19 23:13:15,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:13:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-03-19 23:13:15,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011227460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:13:15,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:13:15,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2022-03-19 23:13:15,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825098669] [2022-03-19 23:13:15,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:13:15,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 23:13:15,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:15,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 23:13:15,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 23:13:15,806 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:13:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:22,737 INFO L93 Difference]: Finished difference Result 254 states and 302 transitions. [2022-03-19 23:13:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-19 23:13:22,743 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 88 [2022-03-19 23:13:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:22,744 INFO L225 Difference]: With dead ends: 254 [2022-03-19 23:13:22,744 INFO L226 Difference]: Without dead ends: 181 [2022-03-19 23:13:22,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10226 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3642, Invalid=24750, Unknown=0, NotChecked=0, Total=28392 [2022-03-19 23:13:22,751 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:22,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 129 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 23:13:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-19 23:13:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-03-19 23:13:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 163 states have internal predecessors, (176), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 23:13:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2022-03-19 23:13:22,776 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 88 [2022-03-19 23:13:22,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:22,776 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2022-03-19 23:13:22,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 23:13:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2022-03-19 23:13:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-19 23:13:22,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:22,778 INFO L499 BasicCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:22,795 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 23:13:22,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:22,996 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1574098228, now seen corresponding path program 3 times [2022-03-19 23:13:22,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330830682] [2022-03-19 23:13:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:22,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 23:13:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 23:13:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 23:13:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-19 23:13:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-03-19 23:13:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-19 23:13:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-03-19 23:13:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-19 23:13:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-03-19 23:13:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-03-19 23:13:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2022-03-19 23:13:23,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330830682] [2022-03-19 23:13:23,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330830682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721297694] [2022-03-19 23:13:23,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:13:23,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:23,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:23,341 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 23:13:23,342 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 23:13:23,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-03-19 23:13:23,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:13:23,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 23:13:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 78 refuted. 0 times theorem prover too weak. 7056 trivial. 0 not checked. [2022-03-19 23:13:24,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:13:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 63 refuted. 0 times theorem prover too weak. 7071 trivial. 0 not checked. [2022-03-19 23:13:24,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721297694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:13:24,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:13:24,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 8] total 24 [2022-03-19 23:13:24,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964705712] [2022-03-19 23:13:24,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:13:24,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 23:13:24,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 23:13:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-19 23:13:24,404 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:13:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:25,087 INFO L93 Difference]: Finished difference Result 476 states and 596 transitions. [2022-03-19 23:13:25,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:13:25,088 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 212 [2022-03-19 23:13:25,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:25,090 INFO L225 Difference]: With dead ends: 476 [2022-03-19 23:13:25,090 INFO L226 Difference]: Without dead ends: 291 [2022-03-19 23:13:25,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 441 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 23:13:25,092 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:25,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 110 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:13:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-19 23:13:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 210. [2022-03-19 23:13:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 193 states have (on average 1.1709844559585492) internal successors, (226), 193 states have internal predecessors, (226), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 23:13:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 252 transitions. [2022-03-19 23:13:25,133 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 252 transitions. Word has length 212 [2022-03-19 23:13:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:25,134 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 252 transitions. [2022-03-19 23:13:25,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-19 23:13:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 252 transitions. [2022-03-19 23:13:25,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-03-19 23:13:25,143 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:25,143 INFO L499 BasicCegarLoop]: trace histogram [130, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:25,153 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 23:13:25,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:25,356 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash 524177504, now seen corresponding path program 4 times [2022-03-19 23:13:25,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:25,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268231428] [2022-03-19 23:13:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 23:13:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 23:13:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 23:13:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 23:13:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 23:13:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-19 23:13:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-19 23:13:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-03-19 23:13:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-03-19 23:13:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-03-19 23:13:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1794 proven. 91 refuted. 0 times theorem prover too weak. 8190 trivial. 0 not checked. [2022-03-19 23:13:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268231428] [2022-03-19 23:13:25,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268231428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71679957] [2022-03-19 23:13:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:13:25,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:25,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:13:25,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:13:25,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:13:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:13:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 23:13:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:13:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1846 proven. 91 refuted. 0 times theorem prover too weak. 8138 trivial. 0 not checked. [2022-03-19 23:13:26,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:13:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1812 proven. 91 refuted. 0 times theorem prover too weak. 8172 trivial. 0 not checked. [2022-03-19 23:13:26,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71679957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:13:26,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:13:26,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-19 23:13:26,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128658229] [2022-03-19 23:13:26,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:13:26,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 23:13:26,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:13:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 23:13:26,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-03-19 23:13:26,749 INFO L87 Difference]: Start difference. First operand 210 states and 252 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:13:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:13:39,017 INFO L93 Difference]: Finished difference Result 574 states and 778 transitions. [2022-03-19 23:13:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 23:13:39,017 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 222 [2022-03-19 23:13:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:13:39,019 INFO L225 Difference]: With dead ends: 574 [2022-03-19 23:13:39,019 INFO L226 Difference]: Without dead ends: 371 [2022-03-19 23:13:39,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 451 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=985, Invalid=2555, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 23:13:39,021 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:13:39,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 103 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:13:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-19 23:13:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 370. [2022-03-19 23:13:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 353 states have (on average 1.093484419263456) internal successors, (386), 353 states have internal predecessors, (386), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 23:13:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 412 transitions. [2022-03-19 23:13:39,073 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 412 transitions. Word has length 222 [2022-03-19 23:13:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:13:39,073 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 412 transitions. [2022-03-19 23:13:39,073 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 23:13:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 412 transitions. [2022-03-19 23:13:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-03-19 23:13:39,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:13:39,078 INFO L499 BasicCegarLoop]: trace histogram [290, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:13:39,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:13:39,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:39,279 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:13:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:13:39,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1398924384, now seen corresponding path program 5 times [2022-03-19 23:13:39,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:13:39,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782836308] [2022-03-19 23:13:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:13:39,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:13:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:39,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:13:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 23:13:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-19 23:13:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 23:13:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-03-19 23:13:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-03-19 23:13:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-03-19 23:13:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2022-03-19 23:13:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 297 [2022-03-19 23:13:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2022-03-19 23:13:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2022-03-19 23:13:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:13:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 45195 backedges. 8130 proven. 435 refuted. 0 times theorem prover too weak. 36630 trivial. 0 not checked. [2022-03-19 23:13:40,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:13:40,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782836308] [2022-03-19 23:13:40,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782836308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:13:40,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503423844] [2022-03-19 23:13:40,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:13:40,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:13:40,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:13:40,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:13:40,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:25:42,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-03-19 23:25:42,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 23:25:42,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 45195 backedges. 15374 proven. 435 refuted. 0 times theorem prover too weak. 29386 trivial. 0 not checked. [2022-03-19 23:25:43,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 45195 backedges. 15367 proven. 459 refuted. 0 times theorem prover too weak. 29369 trivial. 0 not checked. [2022-03-19 23:25:47,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503423844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:47,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:47,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 35] total 67 [2022-03-19 23:25:47,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977429804] [2022-03-19 23:25:47,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:47,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-19 23:25:47,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:47,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-19 23:25:47,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=3299, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 23:25:47,529 INFO L87 Difference]: Start difference. First operand 370 states and 412 transitions. Second operand has 67 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 66 states have internal predecessors, (89), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-19 23:25:50,381 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (mod (+ c_main_~z~0 1) 4294967296)) (.cse4 (mod (+ 5 c_main_~z~0) 4294967296)) (.cse13 (mod (+ 16 c_main_~z~0) 4294967296)) (.cse8 (mod (+ 13 c_main_~z~0) 4294967296)) (.cse17 (mod (+ 6 c_main_~z~0) 4294967296)) (.cse0 (mod (+ 21 c_main_~z~0) 4294967296)) (.cse3 (mod (+ 20 c_main_~z~0) 4294967296)) (.cse11 (mod (+ 10 c_main_~z~0) 4294967296)) (.cse10 (mod (+ 11 c_main_~z~0) 4294967296)) (.cse19 (mod (+ 12 c_main_~z~0) 4294967296)) (.cse5 (mod (+ 4 c_main_~z~0) 4294967296)) (.cse23 (mod (+ 28 c_main_~z~0) 4294967296)) (.cse14 (mod c_main_~z~0 4294967296)) (.cse16 (mod (+ 23 c_main_~z~0) 4294967296)) (.cse1 (mod (+ 22 c_main_~z~0) 4294967296)) (.cse15 (mod (+ c_main_~z~0 24) 4294967296)) (.cse20 (mod (+ 7 c_main_~z~0) 4294967296)) (.cse18 (mod (+ 17 c_main_~z~0) 4294967296)) (.cse24 (mod (+ c_main_~z~0 27) 4294967296)) (.cse6 (mod (+ 2 c_main_~z~0) 4294967296)) (.cse22 (mod (+ 3 c_main_~z~0) 4294967296)) (.cse27 (mod (+ 18 c_main_~z~0) 4294967296)) (.cse2 (mod (+ 19 c_main_~z~0) 4294967296)) (.cse9 (mod (+ 14 c_main_~z~0) 4294967296)) (.cse12 (mod (+ 15 c_main_~z~0) 4294967296)) (.cse21 (mod (+ 9 c_main_~z~0) 4294967296)) (.cse26 (mod (+ 8 c_main_~z~0) 4294967296)) (.cse25 (mod (+ 25 c_main_~z~0) 4294967296)) (.cse28 (mod (+ 26 c_main_~z~0) 4294967296))) (and (or (<= 268435455 .cse0) (< .cse1 268435455)) (= |c_#NULL.base| |c_old(#NULL.base)|) (or (<= 268435455 .cse2) (< .cse3 268435455)) (or (< .cse4 268435455) (<= 268435455 .cse5)) (or (< .cse6 268435455) (<= 268435455 .cse7)) (or (<= 268435455 .cse8) (< .cse9 268435455)) (or (< .cse10 268435455) (<= 268435455 .cse11)) (or (<= 268435455 .cse12) (< .cse13 268435455)) (or (<= 268435455 .cse14) (< .cse7 268435455)) (or (< .cse15 268435455) (<= 268435455 .cse16)) (or (< .cse17 268435455) (<= 268435455 .cse4)) (or (<= 268435455 .cse13) (< .cse18 268435455)) (or (< .cse8 268435455) (<= 268435455 .cse19)) (or (<= 268435455 .cse17) (< .cse20 268435455)) (or (< .cse0 268435455) (<= 268435455 .cse3)) (or (< .cse11 268435455) (<= 268435455 .cse21)) (or (<= 268435455 .cse10) (< .cse19 268435455)) (or (<= 268435455 .cse22) (< .cse5 268435455)) (or (< .cse23 268435455) (<= 268435455 .cse24)) (or (<= 268435455 .cse23) (< (mod (+ 29 c_main_~z~0) 4294967296) 268435455)) (or (< .cse14 268435455) (= (mod c_main_~z~0 4) 0)) (or (< .cse16 268435455) (<= 268435455 .cse1)) (or (< .cse25 268435455) (<= 268435455 .cse15)) (or (< .cse26 268435455) (<= 268435455 .cse20)) (or (<= 268435455 .cse18) (< .cse27 268435455)) (or (< .cse24 268435455) (<= 268435455 .cse28)) (or (<= 268435455 .cse6) (< .cse22 268435455)) (or (<= 268435455 .cse27) (< .cse2 268435455)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (or (<= 268435455 .cse9) (< .cse12 268435455)) (or (< .cse21 268435455) (<= 268435455 .cse26)) (or (<= 268435455 .cse25) (< .cse28 268435455)))) is different from false