/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/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 10:31:00,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 10:31:00,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 10:31:00,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 10:31:00,356 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 [2022-02-23 10:31:00,379 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 10:31:00,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 10:31:00,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-23 10:31:00,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-23 10:31:00,380 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 10:31:00,380 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 10:31:00,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 10:31:00,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 10:31:00,381 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 10:31:00,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 10:31:00,381 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 10:31:00,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 10:31:00,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 10:31:00,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 10:31:00,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 10:31:00,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 10:31:00,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 10:31:00,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 10:31:00,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 10:31:00,384 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 10:31:00,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 10:31:00,384 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-23 10:31:00,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-23 10:31:00,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 10:31:00,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 10:31:00,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 10:31:00,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 10:31:00,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 10:31:00,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 10:31:00,602 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 10:31:00,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2022-02-23 10:31:00,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1475d03/d38eb4a3be754cf0b46326a47b5e56f5/FLAG45426882a [2022-02-23 10:31:01,057 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 10:31:01,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2022-02-23 10:31:01,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1475d03/d38eb4a3be754cf0b46326a47b5e56f5/FLAG45426882a [2022-02-23 10:31:01,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a1475d03/d38eb4a3be754cf0b46326a47b5e56f5 [2022-02-23 10:31:01,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 10:31:01,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-23 10:31:01,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 10:31:01,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 10:31:01,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 10:31:01,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565b3ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01, skipping insertion in model container [2022-02-23 10:31:01,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 10:31:01,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 10:31:01,625 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2022-02-23 10:31:01,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 10:31:01,643 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 10:31:01,652 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2022-02-23 10:31:01,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 10:31:01,664 INFO L208 MainTranslator]: Completed translation [2022-02-23 10:31:01,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01 WrapperNode [2022-02-23 10:31:01,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 10:31:01,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 10:31:01,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 10:31:01,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 10:31:01,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 10:31:01,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 10:31:01,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 10:31:01,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 10:31:01,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (1/1) ... [2022-02-23 10:31:01,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 10:31:01,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:31:01,724 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) [2022-02-23 10:31:01,742 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 [2022-02-23 10:31:01,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 10:31:01,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 10:31:01,757 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 10:31:01,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 10:31:01,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 10:31:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 10:31:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 10:31:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 10:31:01,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 10:31:01,815 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 10:31:01,817 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 10:31:01,963 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 10:31:01,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 10:31:01,968 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 10:31:01,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:31:01 BoogieIcfgContainer [2022-02-23 10:31:01,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 10:31:01,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 10:31:01,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 10:31:01,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 10:31:01,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:31:01" (1/3) ... [2022-02-23 10:31:01,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c42f742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:31:01, skipping insertion in model container [2022-02-23 10:31:01,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:31:01" (2/3) ... [2022-02-23 10:31:01,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c42f742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:31:01, skipping insertion in model container [2022-02-23 10:31:01,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:31:01" (3/3) ... [2022-02-23 10:31:02,000 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2022-02-23 10:31:02,004 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 10:31:02,004 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 10:31:02,044 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 10:31:02,050 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 10:31:02,051 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 10:31:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-23 10:31:02,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 10:31:02,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:31:02,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:31:02,090 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:31:02,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:31:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1466806487, now seen corresponding path program 1 times [2022-02-23 10:31:02,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:31:02,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281014022] [2022-02-23 10:31:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:02,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:31:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:31:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:02,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:31:02,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281014022] [2022-02-23 10:31:02,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281014022] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 10:31:02,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 10:31:02,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 10:31:02,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144113194] [2022-02-23 10:31:02,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 10:31:02,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 10:31:02,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:31:02,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 10:31:02,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 10:31:02,332 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 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) [2022-02-23 10:31:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:31:02,365 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-02-23 10:31:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 10:31:02,369 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 [2022-02-23 10:31:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:31:02,373 INFO L225 Difference]: With dead ends: 31 [2022-02-23 10:31:02,373 INFO L226 Difference]: Without dead ends: 14 [2022-02-23 10:31:02,375 INFO L932 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 [2022-02-23 10:31:02,377 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 10:31:02,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 10:31:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-23 10:31:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-23 10:31:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-23 10:31:02,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-23 10:31:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:31:02,405 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-23 10:31:02,406 INFO L471 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) [2022-02-23 10:31:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-23 10:31:02,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-23 10:31:02,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:31:02,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:31:02,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 10:31:02,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:31:02,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:31:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1456647756, now seen corresponding path program 1 times [2022-02-23 10:31:02,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:31:02,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128783966] [2022-02-23 10:31:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:02,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:31:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:31:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:02,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:31:02,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128783966] [2022-02-23 10:31:02,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128783966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 10:31:02,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 10:31:02,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 10:31:02,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185274787] [2022-02-23 10:31:02,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 10:31:02,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 10:31:02,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:31:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 10:31:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 10:31:02,494 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-02-23 10:31:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:31:02,575 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-02-23 10:31:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 10:31:02,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2022-02-23 10:31:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:31:02,576 INFO L225 Difference]: With dead ends: 20 [2022-02-23 10:31:02,576 INFO L226 Difference]: Without dead ends: 15 [2022-02-23 10:31:02,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-23 10:31:02,578 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 10:31:02,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 10:31:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-23 10:31:02,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-23 10:31:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:02,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-02-23 10:31:02,583 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-02-23 10:31:02,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:31:02,583 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-02-23 10:31:02,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-02-23 10:31:02,583 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-02-23 10:31:02,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 10:31:02,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:31:02,584 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:31:02,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 10:31:02,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:31:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:31:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 193151625, now seen corresponding path program 1 times [2022-02-23 10:31:02,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:31:02,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893657988] [2022-02-23 10:31:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:02,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:31:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:31:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:02,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:31:02,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893657988] [2022-02-23 10:31:02,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893657988] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 10:31:02,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 10:31:02,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 10:31:02,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272746511] [2022-02-23 10:31:02,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 10:31:02,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 10:31:02,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:31:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 10:31:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 10:31:02,646 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:31:02,675 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-02-23 10:31:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 10:31:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 10:31:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:31:02,676 INFO L225 Difference]: With dead ends: 25 [2022-02-23 10:31:02,677 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 10:31:02,677 INFO L932 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 [2022-02-23 10:31:02,678 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 10:31:02,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 10:31:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 10:31:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-02-23 10:31:02,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-23 10:31:02,681 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2022-02-23 10:31:02,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:31:02,682 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-23 10:31:02,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-23 10:31:02,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 10:31:02,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:31:02,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:31:02,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 10:31:02,683 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:31:02,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:31:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1968158987, now seen corresponding path program 1 times [2022-02-23 10:31:02,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:31:02,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528707790] [2022-02-23 10:31:02,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:02,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:31:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:31:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:02,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:31:02,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528707790] [2022-02-23 10:31:02,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528707790] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:31:02,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13667597] [2022-02-23 10:31:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:02,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:31:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:31:02,890 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) [2022-02-23 10:31:02,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 10:31:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 10:31:02,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:31:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:03,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:31:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:03,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13667597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 10:31:03,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 10:31:03,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-02-23 10:31:03,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513675347] [2022-02-23 10:31:03,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 10:31:03,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 10:31:03,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:31:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 10:31:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-23 10:31:03,282 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:03,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:31:03,533 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-02-23 10:31:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 10:31:03,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-23 10:31:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:31:03,534 INFO L225 Difference]: With dead ends: 28 [2022-02-23 10:31:03,535 INFO L226 Difference]: Without dead ends: 22 [2022-02-23 10:31:03,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-02-23 10:31:03,536 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 10:31:03,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 41 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 10:31:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-23 10:31:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-02-23 10:31:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-02-23 10:31:03,542 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2022-02-23 10:31:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:31:03,542 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-02-23 10:31:03,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-02-23 10:31:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 10:31:03,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:31:03,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:31:03,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 10:31:03,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:31:03,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:31:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:31:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash 80268138, now seen corresponding path program 1 times [2022-02-23 10:31:03,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:31:03,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324302021] [2022-02-23 10:31:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:03,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:31:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:03,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:31:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:03,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:31:03,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324302021] [2022-02-23 10:31:03,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324302021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:31:03,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100532081] [2022-02-23 10:31:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:03,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:31:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:31:03,840 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) [2022-02-23 10:31:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:03,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 10:31:03,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:31:03,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 10:31:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:03,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:31:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:03,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100532081] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 10:31:03,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 10:31:03,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-23 10:31:03,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322569980] [2022-02-23 10:31:03,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 10:31:03,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 10:31:03,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:31:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 10:31:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-23 10:31:03,956 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-02-23 10:31:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:31:03,994 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-02-23 10:31:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 10:31:03,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 [2022-02-23 10:31:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:31:03,995 INFO L225 Difference]: With dead ends: 31 [2022-02-23 10:31:03,996 INFO L226 Difference]: Without dead ends: 23 [2022-02-23 10:31:03,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-02-23 10:31:03,998 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 10:31:03,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 10:31:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-23 10:31:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-02-23 10:31:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-02-23 10:31:04,008 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-02-23 10:31:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:31:04,008 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-02-23 10:31:04,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2022-02-23 10:31:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-02-23 10:31:04,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-23 10:31:04,010 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:31:04,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:31:04,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 10:31:04,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:31:04,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:31:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:31:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1902707051, now seen corresponding path program 2 times [2022-02-23 10:31:04,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:31:04,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108285932] [2022-02-23 10:31:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:04,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:31:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:04,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 10:31:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 10:31:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 10:31:04,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 10:31:04,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108285932] [2022-02-23 10:31:04,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108285932] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 10:31:04,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130883946] [2022-02-23 10:31:04,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 10:31:04,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:31:04,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 10:31:04,368 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) [2022-02-23 10:31:04,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 10:31:04,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 10:31:04,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 10:31:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 10:31:04,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 10:31:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:04,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 10:31:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 10:31:04,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130883946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 10:31:04,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 10:31:04,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-02-23 10:31:04,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103077536] [2022-02-23 10:31:04,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 10:31:04,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 10:31:04,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 10:31:04,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 10:31:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-02-23 10:31:04,903 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 28 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:05,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 10:31:05,263 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-23 10:31:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 10:31:05,264 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-23 10:31:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 10:31:05,265 INFO L225 Difference]: With dead ends: 34 [2022-02-23 10:31:05,265 INFO L226 Difference]: Without dead ends: 28 [2022-02-23 10:31:05,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 10:31:05,266 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 10:31:05,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 10:31:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-23 10:31:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-02-23 10:31:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-02-23 10:31:05,269 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-02-23 10:31:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 10:31:05,270 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-02-23 10:31:05,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 10:31:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-02-23 10:31:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 10:31:05,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 10:31:05,270 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 10:31:05,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 10:31:05,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 10:31:05,483 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 10:31:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 10:31:05,484 INFO L85 PathProgramCache]: Analyzing trace with hash 116795146, now seen corresponding path program 2 times [2022-02-23 10:31:05,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 10:31:05,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162800056] [2022-02-23 10:31:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 10:31:05,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 10:31:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 10:31:05,493 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-23 10:31:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 10:31:05,538 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-23 10:31:05,538 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-23 10:31:05,539 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 10:31:05,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-23 10:31:05,543 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-02-23 10:31:05,546 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 10:31:05,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:31:05 BoogieIcfgContainer [2022-02-23 10:31:05,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 10:31:05,564 INFO L158 Benchmark]: Toolchain (without parser) took 4143.10ms. Allocated memory was 207.6MB in the beginning and 323.0MB in the end (delta: 115.3MB). Free memory was 153.5MB in the beginning and 123.8MB in the end (delta: 29.7MB). Peak memory consumption was 146.0MB. Max. memory is 8.0GB. [2022-02-23 10:31:05,565 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 207.6MB. Free memory was 169.9MB in the beginning and 169.8MB in the end (delta: 75.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 10:31:05,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.17ms. Allocated memory is still 207.6MB. Free memory was 153.3MB in the beginning and 182.4MB in the end (delta: -29.0MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. [2022-02-23 10:31:05,565 INFO L158 Benchmark]: Boogie Preprocessor took 25.63ms. Allocated memory is still 207.6MB. Free memory was 182.4MB in the beginning and 181.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 10:31:05,565 INFO L158 Benchmark]: RCFGBuilder took 277.30ms. Allocated memory is still 207.6MB. Free memory was 180.9MB in the beginning and 170.9MB in the end (delta: 10.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 10:31:05,566 INFO L158 Benchmark]: TraceAbstraction took 3592.13ms. Allocated memory was 207.6MB in the beginning and 323.0MB in the end (delta: 115.3MB). Free memory was 170.6MB in the beginning and 123.8MB in the end (delta: 46.8MB). Peak memory consumption was 163.0MB. Max. memory is 8.0GB. [2022-02-23 10:31:05,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 207.6MB. Free memory was 169.9MB in the beginning and 169.8MB in the end (delta: 75.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 241.17ms. Allocated memory is still 207.6MB. Free memory was 153.3MB in the beginning and 182.4MB in the end (delta: -29.0MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.63ms. Allocated memory is still 207.6MB. Free memory was 182.4MB in the beginning and 181.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 277.30ms. Allocated memory is still 207.6MB. Free memory was 180.9MB in the beginning and 170.9MB in the end (delta: 10.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3592.13ms. Allocated memory was 207.6MB in the beginning and 323.0MB in the end (delta: 115.3MB). Free memory was 170.6MB in the beginning and 123.8MB in the end (delta: 46.8MB). Peak memory consumption was 163.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=0, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=1, n=2, n=4] [L26] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L24] i++ VAL [i=2, n=4, n=2] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=2, n=4, n=4] [L26] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L24] i++ VAL [i=3, n=4, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=3, n=4, n=6] [L26] COND FALSE !(i==4) VAL [i=3, n=6, n=4] [L24] i++ VAL [i=4, n=4, n=6] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=4, n=8, n=4] [L26] COND TRUE i==4 [L26] sn=-10 VAL [i=4, n=4, n=-10] [L24] i++ VAL [i=5, n=4, n=-10] [L24] COND FALSE !(i<=n) VAL [i=5, n=-10, n=4] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.5s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 109 mSDsluCounter, 192 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 118 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 375 IncrementalHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 74 mSDtfsCounter, 375 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 177 ConstructedInterpolants, 0 QuantifiedInterpolants, 1017 SizeOfPredicates, 6 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 11/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-23 10:31:05,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...