/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/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 12:50:00,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:50:00,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:50:00,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:50:00,698 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 [2022-03-18 12:50:00,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:50:00,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:50:00,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:50:00,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:50:00,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:50:00,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:50:00,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:50:00,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:50:00,722 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:50:00,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:50:00,723 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:50:00,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:50:00,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:50:00,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:50:00,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:50:00,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:50:00,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:50:00,725 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:50:00,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:50:00,725 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:50:00,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:50:00,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:50:00,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:50:00,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:50:00,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:50:00,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:50:00,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:50:00,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:50:00,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:50:00,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:50:00,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:50:00,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:50:00,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:50:00,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:50:00,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:50:00,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:50:00,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:50:00,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:50:00,931 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:50:00,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-03-18 12:50:00,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054f778e4/617b7c9804eb4954a0c0593c75626f92/FLAG88d14d369 [2022-03-18 12:50:01,333 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:50:01,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-03-18 12:50:01,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054f778e4/617b7c9804eb4954a0c0593c75626f92/FLAG88d14d369 [2022-03-18 12:50:01,790 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054f778e4/617b7c9804eb4954a0c0593c75626f92 [2022-03-18 12:50:01,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:50:01,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:50:01,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:50:01,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:50:01,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:50:01,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f16572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01, skipping insertion in model container [2022-03-18 12:50:01,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:50:01,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:50:01,930 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/mono-crafted_8.c[318,331] [2022-03-18 12:50:01,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:50:01,943 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:50:01,950 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/mono-crafted_8.c[318,331] [2022-03-18 12:50:01,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:50:01,965 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:50:01,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01 WrapperNode [2022-03-18 12:50:01,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:50:01,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:50:01,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:50:01,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:50:01,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:50:01,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:50:01,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:50:01,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:50:01,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (1/1) ... [2022-03-18 12:50:01,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:50:01,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:02,007 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) [2022-03-18 12:50:02,024 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 [2022-03-18 12:50:02,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:50:02,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:50:02,050 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:50:02,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 12:50:02,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:50:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:50:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:50:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:50:02,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:50:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:50:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:50:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:50:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:50:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:50:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:50:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:50:02,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:50:02,096 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:50:02,097 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:50:02,164 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:50:02,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:50:02,167 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 12:50:02,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:50:02 BoogieIcfgContainer [2022-03-18 12:50:02,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:50:02,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:50:02,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:50:02,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:50:02,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:50:01" (1/3) ... [2022-03-18 12:50:02,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48803fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:50:02, skipping insertion in model container [2022-03-18 12:50:02,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:50:01" (2/3) ... [2022-03-18 12:50:02,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48803fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:50:02, skipping insertion in model container [2022-03-18 12:50:02,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:50:02" (3/3) ... [2022-03-18 12:50:02,174 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2022-03-18 12:50:02,176 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:50:02,177 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:50:02,206 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:50:02,210 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 [2022-03-18 12:50:02,210 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:50:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 12:50:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 12:50:02,221 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:02,222 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:02,222 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2022-03-18 12:50:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:02,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334624489] [2022-03-18 12:50:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:02,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:02,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:02,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:02,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334624489] [2022-03-18 12:50:02,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334624489] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:50:02,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:50:02,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 12:50:02,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872387326] [2022-03-18 12:50:02,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:50:02,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 12:50:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 12:50:02,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 12:50:02,392 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 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) [2022-03-18 12:50:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:02,446 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-03-18 12:50:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 12:50:02,449 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 [2022-03-18 12:50:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:02,453 INFO L225 Difference]: With dead ends: 33 [2022-03-18 12:50:02,454 INFO L226 Difference]: Without dead ends: 14 [2022-03-18 12:50:02,457 INFO L911 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 [2022-03-18 12:50:02,461 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 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 [2022-03-18 12:50:02,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:50:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-18 12:50:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-18 12:50:02,487 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) [2022-03-18 12:50:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-18 12:50:02,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-18 12:50:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:02,489 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-18 12:50:02,489 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) [2022-03-18 12:50:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-18 12:50:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 12:50:02,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:02,490 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:02,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 12:50:02,491 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2022-03-18 12:50:02,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:02,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37004981] [2022-03-18 12:50:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:02,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:02,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:02,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:02,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37004981] [2022-03-18 12:50:02,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37004981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:50:02,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:50:02,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 12:50:02,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697367028] [2022-03-18 12:50:02,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:50:02,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 12:50:02,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 12:50:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 12:50:02,654 INFO L87 Difference]: Start difference. First operand 14 states and 15 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) [2022-03-18 12:50:02,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:02,703 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-03-18 12:50:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 12:50:02,703 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 [2022-03-18 12:50:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:02,704 INFO L225 Difference]: With dead ends: 25 [2022-03-18 12:50:02,704 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 12:50:02,704 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 12:50:02,705 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:02,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:50:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 12:50:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-03-18 12:50:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-18 12:50:02,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-03-18 12:50:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:02,709 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-18 12:50:02,710 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) [2022-03-18 12:50:02,710 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-18 12:50:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 12:50:02,710 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:02,710 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:02,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 12:50:02,710 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:02,711 INFO L85 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 1 times [2022-03-18 12:50:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:02,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110675313] [2022-03-18 12:50:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:02,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:02,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:02,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110675313] [2022-03-18 12:50:02,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110675313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:02,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234572758] [2022-03-18 12:50:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:02,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:02,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:02,806 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) [2022-03-18 12:50:02,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 12:50:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:02,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 12:50:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:02,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:02,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234572758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:02,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:02,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-03-18 12:50:02,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295989942] [2022-03-18 12:50:02,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:02,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 12:50:02,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:02,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 12:50:02,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:50:02,984 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-03-18 12:50:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:03,068 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-03-18 12:50:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 12:50:03,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 [2022-03-18 12:50:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:03,068 INFO L225 Difference]: With dead ends: 32 [2022-03-18 12:50:03,069 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 12:50:03,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-03-18 12:50:03,070 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:03,070 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 28 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:50:03,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 12:50:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-18 12:50:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-18 12:50:03,074 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-03-18 12:50:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:03,074 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-18 12:50:03,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-03-18 12:50:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-18 12:50:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 12:50:03,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:03,074 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:03,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:03,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:03,288 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:03,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1341602340, now seen corresponding path program 1 times [2022-03-18 12:50:03,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:03,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257942188] [2022-03-18 12:50:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:03,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:03,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:50:03,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:03,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257942188] [2022-03-18 12:50:03,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257942188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:03,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097944925] [2022-03-18 12:50:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:03,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:03,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:03,503 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) [2022-03-18 12:50:03,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 12:50:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:03,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 12:50:03,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:50:03,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 12:50:03,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097944925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:03,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:03,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-03-18 12:50:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725680013] [2022-03-18 12:50:03,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:03,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 12:50:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 12:50:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-18 12:50:03,751 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-03-18 12:50:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:03,904 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-03-18 12:50:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 12:50:03,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 23 [2022-03-18 12:50:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:03,905 INFO L225 Difference]: With dead ends: 44 [2022-03-18 12:50:03,906 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 12:50:03,906 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-03-18 12:50:03,907 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:03,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 38 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:50:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 12:50:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-03-18 12:50:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-18 12:50:03,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2022-03-18 12:50:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:03,912 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-18 12:50:03,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-03-18 12:50:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-18 12:50:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 12:50:03,912 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:03,913 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:03,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:04,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 12:50:04,126 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1571384604, now seen corresponding path program 2 times [2022-03-18 12:50:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:04,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910601598] [2022-03-18 12:50:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:04,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:04,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:04,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910601598] [2022-03-18 12:50:04,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910601598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589762550] [2022-03-18 12:50:04,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:50:04,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:04,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:04,325 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) [2022-03-18 12:50:04,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 12:50:04,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:50:04,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 12:50:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:04,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:04,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589762550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:04,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:04,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-03-18 12:50:04,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782455310] [2022-03-18 12:50:04,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:04,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 12:50:04,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:04,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 12:50:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:50:04,652 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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) [2022-03-18 12:50:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:05,191 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-03-18 12:50:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 12:50:05,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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 23 [2022-03-18 12:50:05,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:05,192 INFO L225 Difference]: With dead ends: 47 [2022-03-18 12:50:05,192 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 12:50:05,192 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2022-03-18 12:50:05,193 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:05,193 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 43 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:50:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 12:50:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-18 12:50:05,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-03-18 12:50:05,197 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-03-18 12:50:05,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:05,198 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-03-18 12:50:05,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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) [2022-03-18 12:50:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-03-18 12:50:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 12:50:05,198 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:05,198 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:05,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:05,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:05,407 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1427761564, now seen corresponding path program 2 times [2022-03-18 12:50:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:05,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866297382] [2022-03-18 12:50:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:05,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:05,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:50:05,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:05,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866297382] [2022-03-18 12:50:05,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866297382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:05,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483667600] [2022-03-18 12:50:05,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:50:05,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:05,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:05,516 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) [2022-03-18 12:50:05,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 12:50:05,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:50:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:05,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 12:50:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:50:05,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-18 12:50:05,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483667600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:05,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:05,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 12:50:05,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269561568] [2022-03-18 12:50:05,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:05,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 12:50:05,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:05,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 12:50:05,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:50:05,847 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-03-18 12:50:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:07,383 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-03-18 12:50:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 12:50:07,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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 41 [2022-03-18 12:50:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:07,385 INFO L225 Difference]: With dead ends: 76 [2022-03-18 12:50:07,385 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 12:50:07,386 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-03-18 12:50:07,386 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:07,387 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 48 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:50:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 12:50:07,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-03-18 12:50:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-03-18 12:50:07,395 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 41 [2022-03-18 12:50:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:07,396 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-03-18 12:50:07,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-03-18 12:50:07,396 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-03-18 12:50:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 12:50:07,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:07,396 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:07,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 12:50:07,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:07,615 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:07,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1653655580, now seen corresponding path program 3 times [2022-03-18 12:50:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408534792] [2022-03-18 12:50:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:07,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:07,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:07,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:07,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408534792] [2022-03-18 12:50:07,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408534792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:07,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79408573] [2022-03-18 12:50:07,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:50:07,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:07,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:07,833 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) [2022-03-18 12:50:07,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 12:50:07,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 12:50:07,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:07,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 12:50:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-18 12:50:07,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 12:50:07,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79408573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:50:07,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 12:50:07,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-03-18 12:50:07,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740060973] [2022-03-18 12:50:07,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:50:07,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 12:50:07,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:07,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 12:50:07,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-18 12:50:07,986 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-03-18 12:50:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:08,019 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-03-18 12:50:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:50:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 41 [2022-03-18 12:50:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:08,020 INFO L225 Difference]: With dead ends: 65 [2022-03-18 12:50:08,020 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 12:50:08,021 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-18 12:50:08,021 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:08,021 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 12:50:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 12:50:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-03-18 12:50:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-18 12:50:08,031 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 41 [2022-03-18 12:50:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:08,033 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-18 12:50:08,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2022-03-18 12:50:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-18 12:50:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 12:50:08,034 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:08,035 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:08,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 12:50:08,252 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:08,252 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1498663498, now seen corresponding path program 3 times [2022-03-18 12:50:08,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:08,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239045359] [2022-03-18 12:50:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:08,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:08,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:08,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:08,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239045359] [2022-03-18 12:50:08,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239045359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:08,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842164884] [2022-03-18 12:50:08,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:50:08,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:08,491 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) [2022-03-18 12:50:08,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 12:50:08,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 12:50:08,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:08,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 12:50:08,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-18 12:50:08,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-18 12:50:08,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842164884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:08,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:08,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 26 [2022-03-18 12:50:08,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900792675] [2022-03-18 12:50:08,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:08,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 12:50:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:08,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 12:50:08,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-18 12:50:08,959 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-03-18 12:50:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:50:10,039 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-03-18 12:50:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 12:50:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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 56 [2022-03-18 12:50:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:50:10,040 INFO L225 Difference]: With dead ends: 89 [2022-03-18 12:50:10,040 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 12:50:10,041 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 12:50:10,042 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 214 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:50:10,042 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 82 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 12:50:10,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 12:50:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-03-18 12:50:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 70 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:50:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-03-18 12:50:10,049 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 56 [2022-03-18 12:50:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:50:10,050 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-03-18 12:50:10,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-03-18 12:50:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-03-18 12:50:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 12:50:10,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:50:10,051 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:50:10,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 12:50:10,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:10,263 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:50:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:50:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1989301962, now seen corresponding path program 4 times [2022-03-18 12:50:10,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:50:10,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048002430] [2022-03-18 12:50:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:50:10,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:50:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:10,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:50:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:50:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 12:50:10,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:50:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048002430] [2022-03-18 12:50:10,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048002430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:50:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303453659] [2022-03-18 12:50:10,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:50:10,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:50:10,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:50:10,596 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) [2022-03-18 12:50:10,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 12:50:10,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:50:10,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:50:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 12:50:10,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:50:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:11,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:50:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:50:12,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303453659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:50:12,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:50:12,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 24] total 47 [2022-03-18 12:50:12,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139605927] [2022-03-18 12:50:12,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:50:12,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 12:50:12,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:50:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 12:50:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 12:50:12,015 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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) [2022-03-18 12:51:26,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:51:26,138 INFO L93 Difference]: Finished difference Result 175 states and 211 transitions. [2022-03-18 12:51:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 12:51:26,139 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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 74 [2022-03-18 12:51:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:51:26,140 INFO L225 Difference]: With dead ends: 175 [2022-03-18 12:51:26,140 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 12:51:26,142 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 74.4s TimeCoverageRelationStatistics Valid=2122, Invalid=5709, Unknown=1, NotChecked=0, Total=7832 [2022-03-18 12:51:26,142 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 317 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 12:51:26,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 134 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 12:51:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 12:51:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-18 12:51:26,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:51:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2022-03-18 12:51:26,163 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 74 [2022-03-18 12:51:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:51:26,164 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2022-03-18 12:51:26,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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) [2022-03-18 12:51:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2022-03-18 12:51:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-18 12:51:26,167 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:51:26,167 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 42, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:51:26,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 12:51:26,368 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:51:26,368 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:51:26,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:51:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash -397481014, now seen corresponding path program 5 times [2022-03-18 12:51:26,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:51:26,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79747100] [2022-03-18 12:51:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:51:26,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:51:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:51:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:51:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:51:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 597 proven. 2667 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 12:51:27,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:51:27,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79747100] [2022-03-18 12:51:27,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79747100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:51:27,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508086147] [2022-03-18 12:51:27,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:51:27,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:51:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:51:27,298 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) [2022-03-18 12:51:27,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 12:55:16,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2022-03-18 12:55:16,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:55:16,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-18 12:55:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:55:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:55:18,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:55:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:55:22,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508086147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:55:22,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:55:22,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 50, 50] total 142 [2022-03-18 12:55:22,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475295703] [2022-03-18 12:55:22,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:55:22,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-03-18 12:55:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:55:22,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-03-18 12:55:22,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4778, Invalid=15244, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 12:55:22,590 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 142 states, 142 states have (on average 2.964788732394366) internal successors, (421), 141 states have internal predecessors, (421), 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) [2022-03-18 12:55:27,395 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_main_~y~0 4294967296))) (and (let ((.cse0 (mod (+ 38 c_main_~x~0) 4294967296))) (or (not (< .cse0 .cse1)) (not (<= 5000000 .cse0)))) (let ((.cse2 (mod (+ 2 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse2)) (not (< .cse2 .cse1)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (let ((.cse3 (mod (+ 3 c_main_~x~0) 4294967296))) (or (not (< .cse3 .cse1)) (not (<= 5000000 .cse3)))) (let ((.cse4 (mod (+ c_main_~x~0 24) 4294967296))) (or (not (<= 5000000 .cse4)) (not (< .cse4 .cse1)))) (let ((.cse5 (mod (+ 31 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse5)) (not (< .cse5 .cse1)))) (let ((.cse6 (mod (+ 32 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse6)) (not (< .cse6 .cse1)))) (let ((.cse7 (mod (+ 9 c_main_~x~0) 4294967296))) (or (not (< .cse7 .cse1)) (not (<= 5000000 .cse7)))) (let ((.cse8 (mod (+ 45 c_main_~x~0) 4294967296))) (or (not (< .cse8 .cse1)) (not (<= 5000000 .cse8)))) (let ((.cse9 (mod (+ 20 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse9)) (not (< .cse9 .cse1)))) (let ((.cse10 (mod (+ 40 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse10)) (not (< .cse10 .cse1)))) (let ((.cse11 (mod (+ 10 c_main_~x~0) 4294967296))) (or (not (< .cse11 .cse1)) (not (<= 5000000 .cse11)))) (let ((.cse12 (mod (+ 15 c_main_~x~0) 4294967296))) (or (not (< .cse12 .cse1)) (not (<= 5000000 .cse12)))) (let ((.cse13 (mod (+ 41 c_main_~x~0) 4294967296))) (or (not (< .cse13 .cse1)) (not (<= 5000000 .cse13)))) (let ((.cse14 (mod (+ 6 c_main_~x~0) 4294967296))) (or (not (< .cse14 .cse1)) (not (<= 5000000 .cse14)))) (let ((.cse15 (mod (+ 30 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse15)) (not (< .cse15 .cse1)))) (let ((.cse16 (mod (+ 36 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse16)) (not (< .cse16 .cse1)))) (let ((.cse17 (mod (+ 21 c_main_~x~0) 4294967296))) (or (not (< .cse17 .cse1)) (not (<= 5000000 .cse17)))) (let ((.cse18 (mod (+ 22 c_main_~x~0) 4294967296))) (or (not (< .cse18 .cse1)) (not (<= 5000000 .cse18)))) (let ((.cse19 (mod (+ 25 c_main_~x~0) 4294967296))) (or (not (< .cse19 .cse1)) (not (<= 5000000 .cse19)))) (let ((.cse20 (mod (+ 34 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse20)) (not (< .cse20 .cse1)))) (let ((.cse21 (mod (+ 35 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse21)) (not (< .cse21 .cse1)))) (let ((.cse22 (mod (+ 14 c_main_~x~0) 4294967296))) (or (not (< .cse22 .cse1)) (not (<= 5000000 .cse22)))) (let ((.cse23 (mod (+ 43 c_main_~x~0) 4294967296))) (or (not (< .cse23 .cse1)) (not (<= 5000000 .cse23)))) (let ((.cse24 (mod (+ 39 c_main_~x~0) 4294967296))) (or (not (< .cse24 .cse1)) (not (<= 5000000 .cse24)))) (let ((.cse25 (mod (+ 13 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse25)) (not (< .cse25 .cse1)))) (let ((.cse26 (mod (+ c_main_~x~0 27) 4294967296))) (or (not (< .cse26 .cse1)) (not (<= 5000000 .cse26)))) (let ((.cse27 (mod (+ c_main_~x~0 11) 4294967296))) (or (not (< .cse27 .cse1)) (not (<= 5000000 .cse27)))) (let ((.cse28 (mod (+ 33 c_main_~x~0) 4294967296))) (or (not (< .cse28 .cse1)) (not (<= 5000000 .cse28)))) (let ((.cse29 (mod (+ 42 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse29)) (not (< .cse29 .cse1)))) (let ((.cse30 (mod (+ 12 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse30)) (not (< .cse30 .cse1)))) (let ((.cse31 (mod (+ 4 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse31)) (not (< .cse31 .cse1)))) (let ((.cse32 (mod (+ 16 c_main_~x~0) 4294967296))) (or (not (< .cse32 .cse1)) (not (<= 5000000 .cse32)))) (let ((.cse33 (mod (+ 23 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse33)) (not (< .cse33 .cse1)))) (let ((.cse34 (mod (+ 17 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse34)) (not (< .cse34 .cse1)))) (let ((.cse35 (mod (+ c_main_~x~0 1) 4294967296))) (or (not (<= 5000000 .cse35)) (not (< .cse35 .cse1)))) (let ((.cse36 (mod (+ 19 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse36)) (not (< .cse36 .cse1)))) (let ((.cse37 (mod (+ 26 c_main_~x~0) 4294967296))) (or (not (< .cse37 .cse1)) (not (<= 5000000 .cse37)))) (let ((.cse38 (mod (+ 29 c_main_~x~0) 4294967296))) (or (not (< .cse38 .cse1)) (not (<= 5000000 .cse38)))) (not (<= 5000000 (mod c_main_~x~0 4294967296))) (let ((.cse39 (mod (+ 8 c_main_~x~0) 4294967296))) (or (not (< .cse39 .cse1)) (not (<= 5000000 .cse39)))) (let ((.cse40 (mod (+ 7 c_main_~x~0) 4294967296))) (or (not (< .cse40 .cse1)) (not (<= 5000000 .cse40)))) (let ((.cse41 (mod (+ 44 c_main_~x~0) 4294967296))) (or (not (< .cse41 .cse1)) (not (<= 5000000 .cse41)))) (let ((.cse42 (mod (+ c_main_~x~0 37) 4294967296))) (or (not (< .cse42 .cse1)) (not (<= 5000000 .cse42)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (let ((.cse43 (mod (+ 5 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse43)) (not (< .cse43 .cse1)))) (let ((.cse44 (mod (+ 28 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse44)) (not (< .cse44 .cse1)))) (let ((.cse45 (mod (+ 18 c_main_~x~0) 4294967296))) (or (not (< .cse45 .cse1)) (not (<= 5000000 .cse45)))) (let ((.cse46 (mod (+ 46 c_main_~x~0) 4294967296))) (or (not (<= 5000000 .cse46)) (not (< .cse46 .cse1)))))) is different from false