/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 12:14:32,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 12:14:32,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 12:14:32,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 12:14:32,902 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 12:14:32,919 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 12:14:32,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 12:14:32,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 12:14:32,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 12:14:32,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 12:14:32,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 12:14:32,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 12:14:32,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 12:14:32,922 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 12:14:32,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 12:14:32,922 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 12:14:32,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 12:14:32,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 12:14:32,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 12:14:32,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 12:14:32,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 12:14:32,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 12:14:32,923 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 12:14:32,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 12:14:32,923 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 12:14:32,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 12:14:32,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 12:14:32,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 12:14:32,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 12:14:32,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:14:32,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 12:14:32,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 12:14:32,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 12:14:32,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 12:14:32,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 12:14:32,925 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 12:14:32,925 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 12:14:32,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 12:14:32,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 12:14:33,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 12:14:33,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 12:14:33,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 12:14:33,280 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 12:14:33,281 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 12:14:33,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-18 12:14:33,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ecfe5551/25004dc4278949948f58d318e6f58fec/FLAG57a5ccfee [2022-03-18 12:14:33,775 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 12:14:33,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-18 12:14:33,781 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ecfe5551/25004dc4278949948f58d318e6f58fec/FLAG57a5ccfee [2022-03-18 12:14:33,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ecfe5551/25004dc4278949948f58d318e6f58fec [2022-03-18 12:14:33,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 12:14:33,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 12:14:33,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 12:14:33,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 12:14:33,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 12:14:33,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:14:33" (1/1) ... [2022-03-18 12:14:33,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da8b8d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:33, skipping insertion in model container [2022-03-18 12:14:33,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:14:33" (1/1) ... [2022-03-18 12:14:33,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 12:14:33,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 12:14:33,991 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-18 12:14:34,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:14:34,013 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 12:14:34,023 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-18 12:14:34,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 12:14:34,040 INFO L208 MainTranslator]: Completed translation [2022-03-18 12:14:34,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34 WrapperNode [2022-03-18 12:14:34,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 12:14:34,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 12:14:34,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 12:14:34,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 12:14:34,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (1/1) ... [2022-03-18 12:14:34,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (1/1) ... [2022-03-18 12:14:34,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (1/1) ... [2022-03-18 12:14:34,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (1/1) ... [2022-03-18 12:14:34,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (1/1) ... [2022-03-18 12:14:34,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (1/1) ... [2022-03-18 12:14:34,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (1/1) ... [2022-03-18 12:14:34,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 12:14:34,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 12:14:34,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 12:14:34,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 12:14:34,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (1/1) ... [2022-03-18 12:14:34,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 12:14:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:14:34,125 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 12:14:34,143 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 12:14:34,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 12:14:34,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 12:14:34,162 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 12:14:34,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 12:14:34,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 12:14:34,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 12:14:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 12:14:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 12:14:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-18 12:14:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 12:14:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 12:14:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 12:14:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 12:14:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 12:14:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 12:14:34,251 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 12:14:34,253 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 12:14:34,369 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 12:14:34,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 12:14:34,374 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 12:14:34,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:14:34 BoogieIcfgContainer [2022-03-18 12:14:34,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 12:14:34,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 12:14:34,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 12:14:34,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 12:14:34,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:14:33" (1/3) ... [2022-03-18 12:14:34,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269af1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:14:34, skipping insertion in model container [2022-03-18 12:14:34,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:14:34" (2/3) ... [2022-03-18 12:14:34,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269af1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:14:34, skipping insertion in model container [2022-03-18 12:14:34,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:14:34" (3/3) ... [2022-03-18 12:14:34,383 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2022-03-18 12:14:34,388 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 12:14:34,388 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 12:14:34,430 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 12:14:34,437 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 12:14:34,438 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 12:14:34,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 12:14:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 12:14:34,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:14:34,475 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:14:34,476 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:14:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:14:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 1 times [2022-03-18 12:14:34,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:14:34,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379191671] [2022-03-18 12:14:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:34,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:14:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:34,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:14:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:34,726 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 12:14:34,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:14:34,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379191671] [2022-03-18 12:14:34,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379191671] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 12:14:34,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 12:14:34,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 12:14:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946251824] [2022-03-18 12:14:34,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 12:14:34,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 12:14:34,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:14:34,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 12:14:34,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 12:14:34,775 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:14:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:14:34,946 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-03-18 12:14:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 12:14:34,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 12:14:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:14:34,959 INFO L225 Difference]: With dead ends: 48 [2022-03-18 12:14:34,960 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 12:14:34,963 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-18 12:14:34,966 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:14:34,967 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:14:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 12:14:35,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-18 12:14:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 12:14:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-18 12:14:35,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-18 12:14:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:14:35,011 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-18 12:14:35,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:14:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-18 12:14:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 12:14:35,013 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:14:35,013 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:14:35,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 12:14:35,016 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:14:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:14:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 1 times [2022-03-18 12:14:35,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:14:35,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475054127] [2022-03-18 12:14:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:14:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:35,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:14:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:35,330 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 12:14:35,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:14:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475054127] [2022-03-18 12:14:35,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475054127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:14:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637103397] [2022-03-18 12:14:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:35,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:35,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:14:35,334 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 12:14:35,335 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 12:14:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:35,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 12:14:35,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:14:35,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-18 12:14:35,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-18 12:14:35,627 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 12:14:35,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:14:35,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-03-18 12:14:35,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-03-18 12:14:35,813 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 12:14:35,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637103397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:14:35,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:14:35,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-18 12:14:35,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808833511] [2022-03-18 12:14:35,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:14:35,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 12:14:35,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:14:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 12:14:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:14:35,830 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:14:36,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:14:36,059 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-18 12:14:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 12:14:36,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-18 12:14:36,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:14:36,062 INFO L225 Difference]: With dead ends: 32 [2022-03-18 12:14:36,062 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 12:14:36,063 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-18 12:14:36,066 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:14:36,066 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 54 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:14:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 12:14:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-03-18 12:14:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 12:14:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-18 12:14:36,081 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2022-03-18 12:14:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:14:36,081 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-18 12:14:36,081 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:14:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-18 12:14:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 12:14:36,082 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:14:36,083 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:14:36,108 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 12:14:36,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:36,308 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:14:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:14:36,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 1 times [2022-03-18 12:14:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:14:36,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220661640] [2022-03-18 12:14:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:14:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:36,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:14:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:36,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 12:14:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:14:36,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:14:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220661640] [2022-03-18 12:14:36,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220661640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:14:36,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752446067] [2022-03-18 12:14:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:36,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:36,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:14:36,466 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 12:14:36,477 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 12:14:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 12:14:36,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:14:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:14:36,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:14:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:14:36,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752446067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:14:36,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:14:36,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-18 12:14:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144173883] [2022-03-18 12:14:36,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:14:36,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 12:14:36,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:14:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 12:14:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 12:14:36,686 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:14:36,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:14:36,799 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-18 12:14:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 12:14:36,799 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-03-18 12:14:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:14:36,801 INFO L225 Difference]: With dead ends: 46 [2022-03-18 12:14:36,802 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 12:14:36,802 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-18 12:14:36,803 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:14:36,804 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 37 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:14:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 12:14:36,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-18 12:14:36,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 12:14:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-18 12:14:36,810 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-03-18 12:14:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:14:36,811 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-18 12:14:36,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:14:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-18 12:14:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 12:14:36,811 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:14:36,812 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:14:36,838 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 12:14:37,037 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,SelfDestructingSolverStorable2 [2022-03-18 12:14:37,038 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:14:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:14:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 2 times [2022-03-18 12:14:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:14:37,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269064445] [2022-03-18 12:14:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:14:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:37,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:14:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 12:14:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:14:37,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:14:37,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269064445] [2022-03-18 12:14:37,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269064445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:14:37,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969488901] [2022-03-18 12:14:37,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:14:37,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:37,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:14:37,183 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 12:14:37,185 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 12:14:37,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:14:37,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:14:37,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 12:14:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:14:37,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:14:39,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:14:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:14:39,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:14:41,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:14:41,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:14:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:14:41,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969488901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:14:41,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:14:41,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 17 [2022-03-18 12:14:41,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742236907] [2022-03-18 12:14:41,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:14:41,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 12:14:41,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:14:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 12:14:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=227, Unknown=2, NotChecked=0, Total=272 [2022-03-18 12:14:41,693 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 12:14:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:14:42,043 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-03-18 12:14:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 12:14:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-03-18 12:14:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:14:42,045 INFO L225 Difference]: With dead ends: 42 [2022-03-18 12:14:42,045 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 12:14:42,045 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=118, Invalid=636, Unknown=2, NotChecked=0, Total=756 [2022-03-18 12:14:42,046 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:14:42,046 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 83 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 251 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-03-18 12:14:42,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 12:14:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-03-18 12:14:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:14:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-18 12:14:42,059 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2022-03-18 12:14:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:14:42,059 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-18 12:14:42,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 12:14:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-18 12:14:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 12:14:42,061 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:14:42,061 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:14:42,088 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 12:14:42,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:42,262 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:14:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:14:42,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 3 times [2022-03-18 12:14:42,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:14:42,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740068066] [2022-03-18 12:14:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:42,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:14:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:42,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:14:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:42,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 12:14:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:42,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 12:14:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:42,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:14:42,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740068066] [2022-03-18 12:14:42,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740068066] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:14:42,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862885517] [2022-03-18 12:14:42,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:14:42,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:42,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:14:42,387 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 12:14:42,388 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 12:14:42,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 12:14:42,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:14:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 12:14:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:14:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:42,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:14:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:42,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862885517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:14:42,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:14:42,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-18 12:14:42,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280822558] [2022-03-18 12:14:42,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:14:42,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 12:14:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:14:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 12:14:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-18 12:14:42,690 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 12:14:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:14:42,882 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-18 12:14:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 12:14:42,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2022-03-18 12:14:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:14:42,883 INFO L225 Difference]: With dead ends: 60 [2022-03-18 12:14:42,883 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 12:14:42,884 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-18 12:14:42,885 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:14:42,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 54 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:14:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 12:14:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-18 12:14:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:14:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-18 12:14:42,892 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-18 12:14:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:14:42,892 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-18 12:14:42,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 12:14:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-18 12:14:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 12:14:42,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:14:42,893 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:14:42,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 12:14:43,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:43,120 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:14:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:14:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 4 times [2022-03-18 12:14:43,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:14:43,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203092720] [2022-03-18 12:14:43,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:43,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:14:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:43,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:14:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:43,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 12:14:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:43,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 12:14:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:43,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:14:43,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203092720] [2022-03-18 12:14:43,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203092720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:14:43,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001361671] [2022-03-18 12:14:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:14:43,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:14:43,332 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 12:14:43,358 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 12:14:43,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:14:43,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:14:43,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 12:14:43,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:14:43,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:14:44,063 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 12:14:44,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 12:14:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:44,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:14:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001361671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:14:44,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:14:44,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-03-18 12:14:44,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751386324] [2022-03-18 12:14:44,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 12:14:44,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 12:14:44,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:14:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 12:14:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-18 12:14:44,205 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 12:14:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:14:46,586 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-03-18 12:14:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 12:14:46,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-03-18 12:14:46,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:14:46,587 INFO L225 Difference]: With dead ends: 69 [2022-03-18 12:14:46,587 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 12:14:46,588 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=213, Invalid=1678, Unknown=1, NotChecked=0, Total=1892 [2022-03-18 12:14:46,589 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:14:46,589 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 196 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2022-03-18 12:14:46,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 12:14:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 12:14:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 12:14:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-18 12:14:46,595 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2022-03-18 12:14:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:14:46,595 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-18 12:14:46,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 12:14:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-18 12:14:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 12:14:46,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:14:46,596 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:14:46,639 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 12:14:46,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:46,797 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:14:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:14:46,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2142797626, now seen corresponding path program 5 times [2022-03-18 12:14:46,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:14:46,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426259736] [2022-03-18 12:14:46,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:46,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:14:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:47,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:14:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:47,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 12:14:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:47,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 12:14:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:47,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:14:47,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426259736] [2022-03-18 12:14:47,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426259736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:14:47,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210777054] [2022-03-18 12:14:47,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:14:47,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:47,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:14:47,015 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 12:14:47,017 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 12:14:47,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 12:14:47,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:14:47,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 12:14:47,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:14:47,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:14:47,193 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-18 12:14:47,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-18 12:14:55,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:14:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:55,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:14:57,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:14:57,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:14:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:57,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210777054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:14:57,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:14:57,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 23 [2022-03-18 12:14:57,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966822208] [2022-03-18 12:14:57,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:14:57,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 12:14:57,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:14:57,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 12:14:57,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=436, Unknown=3, NotChecked=0, Total=506 [2022-03-18 12:14:57,576 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 12:14:58,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:14:58,595 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-03-18 12:14:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 12:14:58,596 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-03-18 12:14:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:14:58,596 INFO L225 Difference]: With dead ends: 75 [2022-03-18 12:14:58,596 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 12:14:58,597 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=161, Invalid=1096, Unknown=3, NotChecked=0, Total=1260 [2022-03-18 12:14:58,598 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:14:58,598 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 125 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 438 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-03-18 12:14:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 12:14:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2022-03-18 12:14:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 12:14:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-18 12:14:58,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 38 [2022-03-18 12:14:58,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:14:58,604 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-18 12:14:58,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 12:14:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-18 12:14:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 12:14:58,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:14:58,605 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:14:58,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 12:14:58,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:58,823 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:14:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:14:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash 507421208, now seen corresponding path program 6 times [2022-03-18 12:14:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:14:58,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33108899] [2022-03-18 12:14:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:14:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:14:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:59,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:14:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:59,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 12:14:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:59,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 12:14:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:14:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:14:59,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:14:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33108899] [2022-03-18 12:14:59,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33108899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:14:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404179950] [2022-03-18 12:14:59,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:14:59,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:14:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:14:59,027 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 12:14:59,083 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 12:14:59,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 12:14:59,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:14:59,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 12:14:59,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:14:59,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:14:59,204 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 12:14:59,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 12:14:59,246 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-18 12:14:59,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-03-18 12:15:07,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:15:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 12:15:07,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:15:11,620 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (< (+ main_~i~0 1) c_main_~n~0) (forall ((v_ArrVal_117 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_117) (+ c_main_~x~0.offset 8)) 0)))) is different from false [2022-03-18 12:15:11,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:15:11,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:15:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-03-18 12:15:11,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404179950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:15:11,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:15:11,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 29 [2022-03-18 12:15:11,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975682949] [2022-03-18 12:15:11,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:15:11,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 12:15:11,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:15:11,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 12:15:11,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=4, NotChecked=52, Total=812 [2022-03-18 12:15:11,723 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 12:15:13,866 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (< (+ main_~i~0 1) c_main_~n~0) (forall ((v_ArrVal_117 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_117) (+ c_main_~x~0.offset 8)) 0)))) (<= 3 c_main_~i~0) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 8)) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-18 12:15:15,869 WARN L833 $PredicateComparison]: unable to prove that (and (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (< (+ main_~i~0 1) c_main_~n~0) (forall ((v_ArrVal_117 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_117) (+ c_main_~x~0.offset 8)) 0)))) (<= 3 c_main_~i~0) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 8)) 0)) is different from false [2022-03-18 12:15:17,884 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~x~0.offset 8))) (and (not (= (+ (* c_main_~i~0 4) c_main_~x~0.offset) .cse0)) (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (< (+ main_~i~0 1) c_main_~n~0) (forall ((v_ArrVal_117 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_117) (+ c_main_~x~0.offset 8)) 0)))) (= (select (select |c_#memory_int| c_main_~x~0.base) .cse0) 0))) is different from false [2022-03-18 12:15:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:15:18,167 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-03-18 12:15:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 12:15:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-03-18 12:15:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:15:18,169 INFO L225 Difference]: With dead ends: 80 [2022-03-18 12:15:18,169 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 12:15:18,169 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=282, Invalid=1797, Unknown=7, NotChecked=364, Total=2450 [2022-03-18 12:15:18,170 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:15:18,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 161 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 523 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-03-18 12:15:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 12:15:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-03-18 12:15:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:15:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-18 12:15:18,176 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 40 [2022-03-18 12:15:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:15:18,176 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-18 12:15:18,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 12:15:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-18 12:15:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 12:15:18,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:15:18,178 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:15:18,195 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 12:15:18,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:15:18,378 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:15:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:15:18,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 7 times [2022-03-18 12:15:18,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:15:18,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078718660] [2022-03-18 12:15:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:15:18,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:15:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:18,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:15:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:18,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 12:15:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:18,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 12:15:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:18,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 12:15:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:15:18,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:15:18,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078718660] [2022-03-18 12:15:18,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078718660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:15:18,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103685587] [2022-03-18 12:15:18,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:15:18,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:15:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:15:18,544 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 12:15:18,545 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 12:15:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 12:15:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:15:18,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:15:31,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:15:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:15:31,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:15:33,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:15:33,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:15:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:15:33,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103685587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:15:33,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:15:33,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 23 [2022-03-18 12:15:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830364642] [2022-03-18 12:15:33,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:15:33,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 12:15:33,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:15:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 12:15:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=441, Unknown=4, NotChecked=0, Total=506 [2022-03-18 12:15:33,847 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 12:15:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:15:34,145 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2022-03-18 12:15:34,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 12:15:34,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2022-03-18 12:15:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:15:34,147 INFO L225 Difference]: With dead ends: 85 [2022-03-18 12:15:34,147 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 12:15:34,148 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=162, Invalid=1240, Unknown=4, NotChecked=0, Total=1406 [2022-03-18 12:15:34,148 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:15:34,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 115 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 348 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-03-18 12:15:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 12:15:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2022-03-18 12:15:34,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 12:15:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-03-18 12:15:34,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2022-03-18 12:15:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:15:34,154 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-03-18 12:15:34,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 12:15:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-03-18 12:15:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 12:15:34,161 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:15:34,161 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:15:34,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 12:15:34,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 12:15:34,362 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:15:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:15:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1454149646, now seen corresponding path program 8 times [2022-03-18 12:15:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:15:34,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693051924] [2022-03-18 12:15:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:15:34,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:15:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:34,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:15:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:34,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 12:15:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:34,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 12:15:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:34,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 12:15:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:15:34,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:15:34,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693051924] [2022-03-18 12:15:34,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693051924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:15:34,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046979326] [2022-03-18 12:15:34,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:15:34,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:15:34,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:15:34,565 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:15:34,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 12:15:34,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:15:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:15:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 12:15:34,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:15:34,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:15:34,692 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-18 12:15:34,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-18 12:15:47,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:15:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:15:47,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:15:49,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:15:49,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:15:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:15:49,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046979326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:15:49,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:15:49,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2022-03-18 12:15:49,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160273132] [2022-03-18 12:15:49,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:15:49,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 12:15:49,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:15:49,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 12:15:49,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=570, Unknown=4, NotChecked=0, Total=650 [2022-03-18 12:15:49,937 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 12:15:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:15:50,844 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-03-18 12:15:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 12:15:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2022-03-18 12:15:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:15:50,846 INFO L225 Difference]: With dead ends: 116 [2022-03-18 12:15:50,846 INFO L226 Difference]: Without dead ends: 114 [2022-03-18 12:15:50,847 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 84 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=180, Invalid=1456, Unknown=4, NotChecked=0, Total=1640 [2022-03-18 12:15:50,847 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:15:50,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 154 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 518 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-03-18 12:15:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-18 12:15:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2022-03-18 12:15:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 66 states have internal predecessors, (67), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 12:15:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-03-18 12:15:50,859 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 48 [2022-03-18 12:15:50,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:15:50,860 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-03-18 12:15:50,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 12:15:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-03-18 12:15:50,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 12:15:50,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:15:50,861 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:15:50,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 12:15:51,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 12:15:51,062 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:15:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:15:51,062 INFO L85 PathProgramCache]: Analyzing trace with hash -697690800, now seen corresponding path program 9 times [2022-03-18 12:15:51,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:15:51,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384683239] [2022-03-18 12:15:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:15:51,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:15:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:51,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:15:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:51,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 12:15:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 12:15:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 12:15:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:15:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:15:51,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:15:51,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384683239] [2022-03-18 12:15:51,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384683239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:15:51,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233770482] [2022-03-18 12:15:51,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:15:51,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:15:51,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:15:51,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:15:51,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 12:15:51,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 12:15:51,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:15:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 12:15:51,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:15:51,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:15:51,481 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 12:15:51,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 12:15:51,546 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 12:15:51,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 12:16:04,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:16:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:16:04,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:16:07,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:16:07,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:16:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-18 12:16:07,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233770482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:16:07,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:16:07,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 27 [2022-03-18 12:16:07,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209926826] [2022-03-18 12:16:07,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:16:07,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 12:16:07,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:16:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 12:16:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=615, Unknown=4, NotChecked=0, Total=702 [2022-03-18 12:16:07,267 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 12:16:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:16:08,027 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2022-03-18 12:16:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 12:16:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 50 [2022-03-18 12:16:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:16:08,029 INFO L225 Difference]: With dead ends: 107 [2022-03-18 12:16:08,029 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 12:16:08,030 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=222, Invalid=1754, Unknown=4, NotChecked=0, Total=1980 [2022-03-18 12:16:08,030 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:16:08,030 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 161 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 714 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2022-03-18 12:16:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 12:16:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2022-03-18 12:16:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 75 states have internal predecessors, (76), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 12:16:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2022-03-18 12:16:08,043 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 50 [2022-03-18 12:16:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:16:08,043 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2022-03-18 12:16:08,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 24 states have internal predecessors, (58), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 12:16:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2022-03-18 12:16:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 12:16:08,044 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:16:08,045 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:16:08,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 12:16:08,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 12:16:08,260 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:16:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:16:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 10 times [2022-03-18 12:16:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:16:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501045079] [2022-03-18 12:16:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:16:08,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:16:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:08,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:16:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:08,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 12:16:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:08,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 12:16:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:08,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 12:16:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:08,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 12:16:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 12:16:08,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:16:08,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501045079] [2022-03-18 12:16:08,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501045079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:16:08,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971942837] [2022-03-18 12:16:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:16:08,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:16:08,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:16:08,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:16:08,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 12:16:08,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:16:08,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:16:08,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 12:16:08,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:16:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 12:16:08,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:16:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 12:16:08,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971942837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:16:08,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:16:08,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-03-18 12:16:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810722881] [2022-03-18 12:16:08,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:16:08,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 12:16:08,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:16:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 12:16:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-18 12:16:08,767 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 12:16:09,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:16:09,007 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-03-18 12:16:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 12:16:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 54 [2022-03-18 12:16:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:16:09,012 INFO L225 Difference]: With dead ends: 112 [2022-03-18 12:16:09,012 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 12:16:09,013 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2022-03-18 12:16:09,013 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:16:09,014 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 53 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:16:09,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 12:16:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-18 12:16:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 12:16:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-03-18 12:16:09,045 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 54 [2022-03-18 12:16:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:16:09,045 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-03-18 12:16:09,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 12:16:09,045 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-03-18 12:16:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 12:16:09,046 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:16:09,046 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:16:09,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 12:16:09,246 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 12:16:09,247 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:16:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:16:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 11 times [2022-03-18 12:16:09,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:16:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419166601] [2022-03-18 12:16:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:16:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:16:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:09,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:16:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:09,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 12:16:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:09,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 12:16:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:09,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 12:16:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:09,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 12:16:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 12:16:09,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:16:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419166601] [2022-03-18 12:16:09,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419166601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:16:09,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074179424] [2022-03-18 12:16:09,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:16:09,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:16:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:16:09,494 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:16:09,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 12:16:09,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 12:16:09,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:16:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 12:16:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:16:09,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:16:37,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:16:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 12:16:37,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:16:39,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:16:39,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:16:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 12:16:39,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074179424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:16:39,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:16:39,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 26 [2022-03-18 12:16:39,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945556029] [2022-03-18 12:16:39,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:16:39,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 12:16:39,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:16:39,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 12:16:39,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=575, Unknown=5, NotChecked=0, Total=650 [2022-03-18 12:16:39,489 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 12:16:40,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:16:40,002 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-03-18 12:16:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 12:16:40,003 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 56 [2022-03-18 12:16:40,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:16:40,004 INFO L225 Difference]: With dead ends: 92 [2022-03-18 12:16:40,004 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 12:16:40,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 103 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=184, Invalid=1617, Unknown=5, NotChecked=0, Total=1806 [2022-03-18 12:16:40,005 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:16:40,005 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 157 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 609 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-03-18 12:16:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 12:16:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-03-18 12:16:40,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 12:16:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-03-18 12:16:40,017 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 56 [2022-03-18 12:16:40,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:16:40,017 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-03-18 12:16:40,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 12:16:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-03-18 12:16:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 12:16:40,018 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:16:40,018 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:16:40,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 12:16:40,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 12:16:40,242 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:16:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:16:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 12 times [2022-03-18 12:16:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:16:40,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100315786] [2022-03-18 12:16:40,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:16:40,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:16:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:16:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:40,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 12:16:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:40,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 12:16:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 12:16:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:40,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 12:16:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:40,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 12:16:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:16:40,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:16:40,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100315786] [2022-03-18 12:16:40,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100315786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:16:40,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431731891] [2022-03-18 12:16:40,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:16:40,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:16:40,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:16:40,428 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:16:40,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 12:16:40,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 12:16:40,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:16:40,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 12:16:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:16:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:16:40,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:16:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:16:40,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431731891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:16:40,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:16:40,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-03-18 12:16:40,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023057332] [2022-03-18 12:16:40,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:16:40,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 12:16:40,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:16:40,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 12:16:40,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-03-18 12:16:40,982 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 12:16:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:16:41,351 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2022-03-18 12:16:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 12:16:41,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 64 [2022-03-18 12:16:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:16:41,352 INFO L225 Difference]: With dead ends: 110 [2022-03-18 12:16:41,352 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 12:16:41,353 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 12:16:41,354 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:16:41,354 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 60 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:16:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 12:16:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-18 12:16:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 12:16:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-18 12:16:41,368 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-03-18 12:16:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:16:41,368 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-18 12:16:41,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 12:16:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-18 12:16:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 12:16:41,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:16:41,370 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:16:41,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 12:16:41,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 12:16:41,593 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:16:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:16:41,593 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 13 times [2022-03-18 12:16:41,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:16:41,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101858462] [2022-03-18 12:16:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:16:41,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:16:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:41,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:16:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:41,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 12:16:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:41,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 12:16:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:41,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 12:16:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:41,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 12:16:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:41,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 12:16:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:16:41,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:16:41,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101858462] [2022-03-18 12:16:41,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101858462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:16:41,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973694383] [2022-03-18 12:16:41,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:16:41,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:16:41,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:16:41,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:16:41,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 12:16:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:16:42,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 12:16:42,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:16:42,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:17:24,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:17:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:17:24,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:17:24,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:17:24,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:17:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:17:24,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973694383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:17:24,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:17:24,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 29 [2022-03-18 12:17:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821138371] [2022-03-18 12:17:24,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:17:24,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 12:17:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:17:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 12:17:24,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=727, Unknown=6, NotChecked=0, Total=812 [2022-03-18 12:17:24,803 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 26 states have internal predecessors, (66), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 12:17:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:17:33,407 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2022-03-18 12:17:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 12:17:33,408 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 26 states have internal predecessors, (66), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 66 [2022-03-18 12:17:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:17:33,408 INFO L225 Difference]: With dead ends: 122 [2022-03-18 12:17:33,408 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 12:17:33,409 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=219, Invalid=2221, Unknown=10, NotChecked=0, Total=2450 [2022-03-18 12:17:33,410 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:17:33,410 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 209 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 878 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-03-18 12:17:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 12:17:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 80. [2022-03-18 12:17:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 12:17:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-03-18 12:17:33,417 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 66 [2022-03-18 12:17:33,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:17:33,417 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-03-18 12:17:33,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.357142857142857) internal successors, (66), 26 states have internal predecessors, (66), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 12:17:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-03-18 12:17:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 12:17:33,418 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:17:33,418 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:17:33,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-18 12:17:33,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:17:33,620 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:17:33,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:17:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1899556638, now seen corresponding path program 14 times [2022-03-18 12:17:33,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:17:33,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297169456] [2022-03-18 12:17:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:17:33,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:17:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:17:33,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:17:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:17:33,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 12:17:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:17:33,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 12:17:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:17:33,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 12:17:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:17:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 12:17:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:17:33,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 12:17:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:17:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:17:33,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:17:33,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297169456] [2022-03-18 12:17:33,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297169456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:17:33,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185036157] [2022-03-18 12:17:33,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:17:33,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:17:33,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:17:33,913 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:17:33,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 12:17:33,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:17:33,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:17:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 12:17:33,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:17:34,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:17:34,078 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-18 12:17:34,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-18 12:18:12,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:18:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:18:12,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:18:14,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:18:14,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:18:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:18:14,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185036157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:18:14,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:18:14,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 32 [2022-03-18 12:18:14,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738284947] [2022-03-18 12:18:14,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:18:14,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 12:18:14,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:18:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 12:18:14,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=892, Unknown=6, NotChecked=0, Total=992 [2022-03-18 12:18:14,939 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 12:18:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:18:15,551 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-03-18 12:18:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 12:18:15,552 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 68 [2022-03-18 12:18:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:18:15,553 INFO L225 Difference]: With dead ends: 160 [2022-03-18 12:18:15,553 INFO L226 Difference]: Without dead ends: 158 [2022-03-18 12:18:15,554 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 123 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=232, Invalid=2414, Unknown=6, NotChecked=0, Total=2652 [2022-03-18 12:18:15,554 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:18:15,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 227 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 849 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-03-18 12:18:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-18 12:18:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2022-03-18 12:18:15,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 97 states have (on average 1.041237113402062) internal successors, (101), 100 states have internal predecessors, (101), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 12:18:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 134 transitions. [2022-03-18 12:18:15,570 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 134 transitions. Word has length 68 [2022-03-18 12:18:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:18:15,570 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 134 transitions. [2022-03-18 12:18:15,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 29 states have internal predecessors, (70), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 12:18:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 134 transitions. [2022-03-18 12:18:15,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 12:18:15,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:18:15,571 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:18:15,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-18 12:18:15,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 12:18:15,780 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:18:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:18:15,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1958520000, now seen corresponding path program 15 times [2022-03-18 12:18:15,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:18:15,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722756879] [2022-03-18 12:18:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:18:15,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:18:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:18:16,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:18:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:18:16,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 12:18:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:18:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 12:18:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:18:16,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 12:18:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:18:16,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 12:18:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:18:16,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 12:18:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:18:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 10 proven. 114 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 12:18:16,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:18:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722756879] [2022-03-18 12:18:16,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722756879] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:18:16,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889971165] [2022-03-18 12:18:16,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:18:16,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:18:16,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:18:16,124 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:18:16,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 12:18:16,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-18 12:18:16,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:18:16,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 12:18:16,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:18:16,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:18:16,341 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 12:18:16,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 12:18:16,357 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 12:18:16,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 12:19:59,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:19:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 30 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 12:19:59,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:20:03,248 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 20)) 0)) is different from false [2022-03-18 12:20:04,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:20:04,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:20:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 40 trivial. 15 not checked. [2022-03-18 12:20:05,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889971165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:20:05,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:20:05,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 21] total 38 [2022-03-18 12:20:05,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662013253] [2022-03-18 12:20:05,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:20:05,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 12:20:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:20:05,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 12:20:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1150, Unknown=38, NotChecked=70, Total=1406 [2022-03-18 12:20:05,032 INFO L87 Difference]: Start difference. First operand 127 states and 134 transitions. Second operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 35 states have internal predecessors, (86), 13 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 12:20:05,820 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 20)) 0) (<= 6 c_main_~i~0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 20)) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-18 12:20:08,713 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~x~0.offset 20))) (and (= (select (select |c_#memory_int| c_main_~x~0.base) .cse0) 0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 20)) 0)) (not (= .cse0 (+ (* c_main_~i~0 4) c_main_~x~0.offset))))) is different from false [2022-03-18 12:20:09,209 WARN L833 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 20)) 0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 20)) 0)) (exists ((main_~i~0 Int)) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4))) 0))) is different from false [2022-03-18 12:20:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:20:09,408 INFO L93 Difference]: Finished difference Result 165 states and 171 transitions. [2022-03-18 12:20:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 12:20:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 35 states have internal predecessors, (86), 13 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 70 [2022-03-18 12:20:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:20:09,409 INFO L225 Difference]: With dead ends: 165 [2022-03-18 12:20:09,409 INFO L226 Difference]: Without dead ends: 163 [2022-03-18 12:20:09,410 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 129 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 112.3s TimeCoverageRelationStatistics Valid=256, Invalid=2268, Unknown=42, NotChecked=404, Total=2970 [2022-03-18 12:20:09,411 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:20:09,411 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 482 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 540 Invalid, 0 Unknown, 267 Unchecked, 0.2s Time] [2022-03-18 12:20:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-18 12:20:09,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2022-03-18 12:20:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 97 states have (on average 1.041237113402062) internal successors, (101), 100 states have internal predecessors, (101), 16 states have call successors, (16), 14 states have call predecessors, (16), 13 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 12:20:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2022-03-18 12:20:09,433 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 70 [2022-03-18 12:20:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:20:09,433 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2022-03-18 12:20:09,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 35 states have internal predecessors, (86), 13 states have call successors, (16), 7 states have call predecessors, (16), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 12:20:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2022-03-18 12:20:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 12:20:09,434 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:20:09,434 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:20:09,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 12:20:09,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 12:20:09,641 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:20:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:20:09,641 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 16 times [2022-03-18 12:20:09,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:20:09,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250841080] [2022-03-18 12:20:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:20:09,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:20:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:09,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:20:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:09,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 12:20:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:09,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 12:20:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:09,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 12:20:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:09,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 12:20:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:09,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 12:20:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 12:20:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 12:20:09,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:20:09,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250841080] [2022-03-18 12:20:09,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250841080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:20:09,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321223169] [2022-03-18 12:20:09,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:20:09,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:20:09,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:20:09,840 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:20:09,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 12:20:09,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:20:09,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:20:09,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 12:20:09,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:20:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 12:20:10,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:20:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 12:20:10,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321223169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:20:10,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:20:10,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-03-18 12:20:10,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193141043] [2022-03-18 12:20:10,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:20:10,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 12:20:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:20:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 12:20:10,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-18 12:20:10,342 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 12:20:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:20:10,653 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2022-03-18 12:20:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 12:20:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 74 [2022-03-18 12:20:10,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:20:10,654 INFO L225 Difference]: With dead ends: 148 [2022-03-18 12:20:10,654 INFO L226 Difference]: Without dead ends: 104 [2022-03-18 12:20:10,655 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=357, Invalid=1365, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 12:20:10,655 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:20:10,655 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 57 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 12:20:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-18 12:20:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2022-03-18 12:20:10,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 12:20:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-18 12:20:10,662 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-03-18 12:20:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:20:10,662 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-18 12:20:10,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 12:20:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-18 12:20:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-18 12:20:10,663 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:20:10,665 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:20:10,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-18 12:20:10,865 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 12:20:10,866 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:20:10,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:20:10,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 17 times [2022-03-18 12:20:10,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:20:10,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905979718] [2022-03-18 12:20:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:20:10,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:20:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:11,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:20:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:11,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 12:20:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:11,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 12:20:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:11,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 12:20:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 12:20:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:11,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 12:20:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 12:20:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:20:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 12:20:11,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:20:11,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905979718] [2022-03-18 12:20:11,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905979718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:20:11,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380830391] [2022-03-18 12:20:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:20:11,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:20:11,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:20:11,260 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:20:11,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 12:20:11,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-18 12:20:11,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:20:11,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 12:20:11,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:20:11,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:21:22,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:21:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 12:21:22,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:21:24,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:21:24,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:21:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 12:21:24,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380830391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:21:24,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:21:24,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 32 [2022-03-18 12:21:24,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952250631] [2022-03-18 12:21:24,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:21:24,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 12:21:24,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:21:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 12:21:24,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=897, Unknown=7, NotChecked=0, Total=992 [2022-03-18 12:21:24,860 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 29 states have internal predecessors, (74), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-18 12:21:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:21:25,512 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-03-18 12:21:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 12:21:25,512 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 29 states have internal predecessors, (74), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 76 [2022-03-18 12:21:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:21:25,513 INFO L225 Difference]: With dead ends: 92 [2022-03-18 12:21:25,513 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 12:21:25,514 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 141 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 73.7s TimeCoverageRelationStatistics Valid=228, Invalid=2521, Unknown=7, NotChecked=0, Total=2756 [2022-03-18 12:21:25,514 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:21:25,514 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 250 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1032 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-03-18 12:21:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 12:21:25,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-03-18 12:21:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 12:21:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-18 12:21:25,521 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 76 [2022-03-18 12:21:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:21:25,522 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-18 12:21:25,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 29 states have internal predecessors, (74), 14 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-18 12:21:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-18 12:21:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 12:21:25,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:21:25,522 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:21:25,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 12:21:25,734 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:21:25,734 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:21:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:21:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 18 times [2022-03-18 12:21:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:21:25,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761570467] [2022-03-18 12:21:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:21:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:21:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:21:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 12:21:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 12:21:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 12:21:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 12:21:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 12:21:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 12:21:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 12:21:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 87 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 12:21:25,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:21:25,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761570467] [2022-03-18 12:21:25,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761570467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:21:25,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594709971] [2022-03-18 12:21:25,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:21:25,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:21:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:21:25,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:21:25,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 12:21:26,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 12:21:26,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:21:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 12:21:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:21:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 12:21:26,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:21:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 12:21:26,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594709971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:21:26,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:21:26,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-03-18 12:21:26,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397653965] [2022-03-18 12:21:26,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:21:26,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 12:21:26,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:21:26,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 12:21:26,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-03-18 12:21:26,462 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 12:21:26,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:21:26,830 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2022-03-18 12:21:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 12:21:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 84 [2022-03-18 12:21:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:21:26,831 INFO L225 Difference]: With dead ends: 130 [2022-03-18 12:21:26,831 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 12:21:26,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=441, Invalid=1721, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 12:21:26,834 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:21:26,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 79 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:21:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 12:21:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-18 12:21:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 12:21:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-18 12:21:26,857 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-03-18 12:21:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:21:26,857 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-18 12:21:26,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 12:21:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-18 12:21:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 12:21:26,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:21:26,858 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:21:26,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 12:21:27,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:21:27,072 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:21:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:21:27,072 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 19 times [2022-03-18 12:21:27,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:21:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428179182] [2022-03-18 12:21:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:21:27,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:21:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:21:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 12:21:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 12:21:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 12:21:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 12:21:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 12:21:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 12:21:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 12:21:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 12:21:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:21:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428179182] [2022-03-18 12:21:27,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428179182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:21:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803270038] [2022-03-18 12:21:27,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 12:21:27,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:21:27,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:21:27,395 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:21:27,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 12:21:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:21:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 12:21:27,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:21:27,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:22:59,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:22:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 12:22:59,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:01,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:23:01,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:23:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 12:23:01,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803270038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:23:01,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:23:01,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 35 [2022-03-18 12:23:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027747933] [2022-03-18 12:23:01,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:01,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 12:23:01,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:01,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 12:23:01,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1085, Unknown=8, NotChecked=0, Total=1190 [2022-03-18 12:23:01,574 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-18 12:23:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:02,303 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-03-18 12:23:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 12:23:02,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 86 [2022-03-18 12:23:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:02,304 INFO L225 Difference]: With dead ends: 102 [2022-03-18 12:23:02,304 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 12:23:02,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 18 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 94.2s TimeCoverageRelationStatistics Valid=250, Invalid=3048, Unknown=8, NotChecked=0, Total=3306 [2022-03-18 12:23:02,306 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:02,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 276 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1178 Invalid, 0 Unknown, 97 Unchecked, 0.4s Time] [2022-03-18 12:23:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 12:23:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-03-18 12:23:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 12:23:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-18 12:23:02,313 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 86 [2022-03-18 12:23:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:02,314 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-18 12:23:02,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-18 12:23:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-18 12:23:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 12:23:02,314 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:02,314 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:02,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-18 12:23:02,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-18 12:23:02,541 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:02,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 20 times [2022-03-18 12:23:02,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:02,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990995658] [2022-03-18 12:23:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:02,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 12:23:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 12:23:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 12:23:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 12:23:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 12:23:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 12:23:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 12:23:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 12:23:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 115 proven. 93 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 12:23:02,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990995658] [2022-03-18 12:23:02,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990995658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469944593] [2022-03-18 12:23:02,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 12:23:02,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:02,746 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:23:02,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 12:23:02,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 12:23:02,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:23:02,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 12:23:02,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 12:23:03,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 12:23:03,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469944593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:23:03,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:23:03,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-03-18 12:23:03,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091854615] [2022-03-18 12:23:03,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:03,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 12:23:03,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 12:23:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 12:23:03,273 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 12:23:03,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:03,650 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2022-03-18 12:23:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 12:23:03,651 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 94 [2022-03-18 12:23:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:03,651 INFO L225 Difference]: With dead ends: 144 [2022-03-18 12:23:03,651 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 12:23:03,652 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=534, Invalid=2118, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 12:23:03,653 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:03,653 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 12:23:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 12:23:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-18 12:23:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 12:23:03,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-18 12:23:03,661 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-03-18 12:23:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:03,661 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-18 12:23:03,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 12:23:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-18 12:23:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-18 12:23:03,662 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:03,662 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:03,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:03,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-18 12:23:03,880 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 21 times [2022-03-18 12:23:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:03,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947424471] [2022-03-18 12:23:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 12:23:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 12:23:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 12:23:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 12:23:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 12:23:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 12:23:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 12:23:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-18 12:23:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 12:23:04,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:04,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947424471] [2022-03-18 12:23:04,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947424471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191419322] [2022-03-18 12:23:04,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 12:23:04,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:04,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:04,228 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:23:04,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 12:23:04,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-18 12:23:04,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:23:04,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 12:23:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:04,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:23:06,446 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 12:23:06,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 12:23:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 12:23:06,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:23:06,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191419322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:06,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:23:06,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 50 [2022-03-18 12:23:06,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072438821] [2022-03-18 12:23:06,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 12:23:06,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 12:23:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:23:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 12:23:06,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2388, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 12:23:06,574 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 47 states have internal predecessors, (107), 18 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 12:23:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:23:07,355 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2022-03-18 12:23:07,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 12:23:07,355 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 47 states have internal predecessors, (107), 18 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 96 [2022-03-18 12:23:07,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:23:07,356 INFO L225 Difference]: With dead ends: 177 [2022-03-18 12:23:07,356 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 12:23:07,358 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 96 SyntacticMatches, 16 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=589, Invalid=6383, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 12:23:07,358 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 12:23:07,358 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 334 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 229 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2022-03-18 12:23:07,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 12:23:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-18 12:23:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 12:23:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-03-18 12:23:07,368 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2022-03-18 12:23:07,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:23:07,368 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-03-18 12:23:07,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.183673469387755) internal successors, (107), 47 states have internal predecessors, (107), 18 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 12:23:07,368 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-03-18 12:23:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 12:23:07,369 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:23:07,369 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:23:07,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 12:23:07,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:07,589 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:23:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:23:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1010860298, now seen corresponding path program 22 times [2022-03-18 12:23:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:23:07,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531167268] [2022-03-18 12:23:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:23:07,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:23:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:23:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 12:23:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 12:23:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 12:23:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 12:23:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 12:23:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 12:23:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 12:23:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-18 12:23:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:23:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 16 proven. 228 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 12:23:07,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:23:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531167268] [2022-03-18 12:23:07,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531167268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:23:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613853421] [2022-03-18 12:23:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 12:23:07,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:23:07,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:23:08,011 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:23:08,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 12:23:08,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 12:23:08,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:23:08,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 12:23:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:23:08,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:23:08,426 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-18 12:23:08,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-18 12:25:08,191 INFO L356 Elim1Store]: treesize reduction 416, result has 0.7 percent of original size [2022-03-18 12:25:08,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 25 [2022-03-18 12:25:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 196 proven. 124 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-18 12:25:08,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:25:08,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613853421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:25:08,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 12:25:08,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 34] total 58 [2022-03-18 12:25:08,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372109969] [2022-03-18 12:25:08,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 12:25:08,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 12:25:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:25:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 12:25:08,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=3534, Unknown=16, NotChecked=0, Total=3906 [2022-03-18 12:25:08,628 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 55 states have internal predecessors, (117), 18 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 12:26:45,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:26:45,929 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2022-03-18 12:26:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 12:26:45,929 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 55 states have internal predecessors, (117), 18 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 98 [2022-03-18 12:26:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:26:45,930 INFO L225 Difference]: With dead ends: 179 [2022-03-18 12:26:45,930 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 12:26:45,931 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 125 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 216.4s TimeCoverageRelationStatistics Valid=854, Invalid=9201, Unknown=45, NotChecked=0, Total=10100 [2022-03-18 12:26:45,931 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 46 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 12:26:45,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 766 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 596 Invalid, 0 Unknown, 444 Unchecked, 0.2s Time] [2022-03-18 12:26:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 12:26:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 12:26:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 82 states have internal predecessors, (83), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 12:26:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-18 12:26:45,942 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-03-18 12:26:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:26:45,942 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-18 12:26:45,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 55 states have internal predecessors, (117), 18 states have call successors, (21), 7 states have call predecessors, (21), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 12:26:45,942 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-18 12:26:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 12:26:45,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:26:45,943 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:26:45,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 12:26:46,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:46,148 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:26:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:26:46,149 INFO L85 PathProgramCache]: Analyzing trace with hash 790156008, now seen corresponding path program 23 times [2022-03-18 12:26:46,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:26:46,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314556341] [2022-03-18 12:26:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:26:46,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:26:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:26:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 12:26:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 12:26:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 12:26:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 12:26:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 12:26:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 12:26:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 12:26:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-18 12:26:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:26:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 249 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 12:26:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:26:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314556341] [2022-03-18 12:26:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314556341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:26:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738157204] [2022-03-18 12:26:46,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:26:46,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:26:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:26:46,552 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:26:46,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 12:26:46,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-18 12:26:46,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:26:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 12:26:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:26:46,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:26:46,791 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 12:26:46,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 12:26:46,830 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 12:26:46,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 12:28:55,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 12:28:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 1 proven. 264 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 12:28:55,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:28:58,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 12:28:58,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 12:28:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 16 proven. 248 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-18 12:28:58,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738157204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:28:58,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:28:58,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 27] total 42 [2022-03-18 12:28:58,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82718371] [2022-03-18 12:28:58,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:28:58,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 12:28:58,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:28:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 12:28:58,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1585, Unknown=9, NotChecked=0, Total=1722 [2022-03-18 12:28:58,210 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-18 12:28:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:28:59,150 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2022-03-18 12:28:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 12:28:59,151 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 100 [2022-03-18 12:28:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:28:59,151 INFO L225 Difference]: With dead ends: 115 [2022-03-18 12:28:59,151 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 12:28:59,152 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 191 SyntacticMatches, 23 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 131.6s TimeCoverageRelationStatistics Valid=313, Invalid=4370, Unknown=9, NotChecked=0, Total=4692 [2022-03-18 12:28:59,152 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 90 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 12:28:59,152 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 358 Invalid, 1751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1584 Invalid, 0 Unknown, 122 Unchecked, 0.5s Time] [2022-03-18 12:28:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 12:28:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-03-18 12:28:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 88 states have internal predecessors, (89), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 12:28:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-03-18 12:28:59,174 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 100 [2022-03-18 12:28:59,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:28:59,174 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-03-18 12:28:59,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 18 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-18 12:28:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-03-18 12:28:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-18 12:28:59,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:28:59,177 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:28:59,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 12:28:59,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 12:28:59,392 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:28:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:28:59,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1936207678, now seen corresponding path program 24 times [2022-03-18 12:28:59,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:28:59,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552585535] [2022-03-18 12:28:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:28:59,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:28:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:28:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 12:28:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 12:28:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 12:28:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 12:28:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 12:28:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 12:28:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 12:28:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-18 12:28:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-18 12:28:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:28:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 18 proven. 283 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 12:28:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:28:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552585535] [2022-03-18 12:28:59,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552585535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:28:59,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487017134] [2022-03-18 12:28:59,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 12:28:59,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:28:59,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:28:59,796 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:28:59,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 12:28:59,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-18 12:28:59,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:28:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 12:28:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:29:00,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 12:29:00,320 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-18 12:29:00,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26