/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-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:34:53,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:34:53,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:34:53,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:34:53,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 22:34:53,360 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:34:53,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:34:53,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:34:53,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:34:53,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:34:53,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:34:53,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:34:53,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:34:53,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:34:53,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:34:53,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:34:53,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:34:53,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:34:53,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:34:53,364 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:34:53,364 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:34:53,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:34:53,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:34:53,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:34:53,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:34:53,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:34:53,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:34:53,561 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:34:53,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2022-03-19 22:34:53,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c61b2e3e/f25c9569ca4e420a975c9875375842cb/FLAG221880f7d [2022-03-19 22:34:53,969 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:34:53,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i [2022-03-19 22:34:53,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c61b2e3e/f25c9569ca4e420a975c9875375842cb/FLAG221880f7d [2022-03-19 22:34:53,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c61b2e3e/f25c9569ca4e420a975c9875375842cb [2022-03-19 22:34:53,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:34:53,984 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:34:53,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:34:53,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:34:53,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:34:53,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:34:53" (1/1) ... [2022-03-19 22:34:53,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db88e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:53, skipping insertion in model container [2022-03-19 22:34:53,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:34:53" (1/1) ... [2022-03-19 22:34:53,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:34:53,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:34:54,111 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-new/count_by_k.i[891,904] [2022-03-19 22:34:54,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:34:54,123 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:34:54,131 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-new/count_by_k.i[891,904] [2022-03-19 22:34:54,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:34:54,141 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:34:54,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54 WrapperNode [2022-03-19 22:34:54,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:34:54,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:34:54,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:34:54,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:34:54,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (1/1) ... [2022-03-19 22:34:54,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (1/1) ... [2022-03-19 22:34:54,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (1/1) ... [2022-03-19 22:34:54,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (1/1) ... [2022-03-19 22:34:54,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (1/1) ... [2022-03-19 22:34:54,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (1/1) ... [2022-03-19 22:34:54,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (1/1) ... [2022-03-19 22:34:54,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:34:54,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:34:54,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:34:54,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:34:54,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (1/1) ... [2022-03-19 22:34:54,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:34:54,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:54,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 22:34:54,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 22:34:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:34:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:34:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:34:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 22:34:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:34:54,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:34:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:34:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:34:54,228 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:34:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:34:54,271 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:34:54,273 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:34:54,343 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:34:54,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:34:54,348 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 22:34:54,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:34:54 BoogieIcfgContainer [2022-03-19 22:34:54,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:34:54,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:34:54,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:34:54,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:34:54,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:34:53" (1/3) ... [2022-03-19 22:34:54,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58db6a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:34:54, skipping insertion in model container [2022-03-19 22:34:54,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:34:54" (2/3) ... [2022-03-19 22:34:54,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58db6a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:34:54, skipping insertion in model container [2022-03-19 22:34:54,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:34:54" (3/3) ... [2022-03-19 22:34:54,356 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2022-03-19 22:34:54,359 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:34:54,359 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:34:54,405 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:34:54,412 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 22:34:54,412 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:34:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:34:54,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 22:34:54,435 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:54,436 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:54,437 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1676006891, now seen corresponding path program 1 times [2022-03-19 22:34:54,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:54,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585420926] [2022-03-19 22:34:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:54,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:54,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:54,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:54,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585420926] [2022-03-19 22:34:54,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585420926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:34:54,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:34:54,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 22:34:54,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154329819] [2022-03-19 22:34:54,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:34:54,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 22:34:54,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 22:34:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-19 22:34:54,673 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:54,804 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-03-19 22:34:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 22:34:54,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 22:34:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:54,809 INFO L225 Difference]: With dead ends: 43 [2022-03-19 22:34:54,810 INFO L226 Difference]: Without dead ends: 16 [2022-03-19 22:34:54,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-19 22:34:54,814 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:54,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 45 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:34:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-19 22:34:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-19 22:34:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-19 22:34:54,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-03-19 22:34:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:54,837 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-19 22:34:54,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-19 22:34:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 22:34:54,838 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:54,838 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:54,838 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:34:54,838 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1072109235, now seen corresponding path program 1 times [2022-03-19 22:34:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:54,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474259830] [2022-03-19 22:34:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:54,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:54,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:54,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:54,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474259830] [2022-03-19 22:34:54,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474259830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:54,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677302925] [2022-03-19 22:34:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:54,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:54,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:34:54,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:34:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:54,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-19 22:34:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:55,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:55,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677302925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:55,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:55,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-03-19 22:34:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487660202] [2022-03-19 22:34:55,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:55,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 22:34:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 22:34:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:34:55,315 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 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) [2022-03-19 22:34:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:55,445 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-03-19 22:34:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 22:34:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 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 14 [2022-03-19 22:34:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:55,450 INFO L225 Difference]: With dead ends: 26 [2022-03-19 22:34:55,450 INFO L226 Difference]: Without dead ends: 21 [2022-03-19 22:34:55,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-19 22:34:55,453 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:55,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:34:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-19 22:34:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-19 22:34:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-19 22:34:55,462 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2022-03-19 22:34:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:55,463 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-19 22:34:55,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 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) [2022-03-19 22:34:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-19 22:34:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 22:34:55,464 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:55,464 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:55,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 22:34:55,679 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 [2022-03-19 22:34:55,680 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2015805555, now seen corresponding path program 2 times [2022-03-19 22:34:55,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315139608] [2022-03-19 22:34:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:55,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:55,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:55,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315139608] [2022-03-19 22:34:55,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315139608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129191599] [2022-03-19 22:34:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:34:55,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:55,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:34:55,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:34:55,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:34:55,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 22:34:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:55,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:56,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129191599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:56,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:56,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-19 22:34:56,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737278278] [2022-03-19 22:34:56,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:56,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 22:34:56,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 22:34:56,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-03-19 22:34:56,126 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:56,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:56,326 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-03-19 22:34:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 22:34:56,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-19 22:34:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:56,327 INFO L225 Difference]: With dead ends: 36 [2022-03-19 22:34:56,327 INFO L226 Difference]: Without dead ends: 31 [2022-03-19 22:34:56,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-03-19 22:34:56,328 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:56,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:34:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-19 22:34:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-19 22:34:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-19 22:34:56,332 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 20 [2022-03-19 22:34:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:56,332 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-19 22:34:56,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-19 22:34:56,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 22:34:56,333 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:56,333 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:56,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 22:34:56,534 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 [2022-03-19 22:34:56,534 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:56,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:56,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1326665123, now seen corresponding path program 3 times [2022-03-19 22:34:56,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:56,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765168571] [2022-03-19 22:34:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:56,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:56,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:56,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:56,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765168571] [2022-03-19 22:34:56,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765168571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:56,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304091907] [2022-03-19 22:34:56,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:34:56,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:56,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:56,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:34:56,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:34:56,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-19 22:34:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 22:34:56,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:56,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:57,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304091907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:57,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:57,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2022-03-19 22:34:57,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516556431] [2022-03-19 22:34:57,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:57,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 22:34:57,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:57,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 22:34:57,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-03-19 22:34:57,126 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:57,645 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2022-03-19 22:34:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 22:34:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 22:34:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:57,646 INFO L225 Difference]: With dead ends: 56 [2022-03-19 22:34:57,646 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 22:34:57,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=706, Invalid=1550, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 22:34:57,648 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:57,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 29 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:34:57,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 22:34:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-19 22:34:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-19 22:34:57,653 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 30 [2022-03-19 22:34:57,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:57,653 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-19 22:34:57,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:34:57,654 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-19 22:34:57,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 22:34:57,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:57,655 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:57,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:34:57,867 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 [2022-03-19 22:34:57,867 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2080857935, now seen corresponding path program 4 times [2022-03-19 22:34:57,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:57,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722480183] [2022-03-19 22:34:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:57,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:58,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:58,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:58,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722480183] [2022-03-19 22:34:58,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722480183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:58,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342015550] [2022-03-19 22:34:58,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:34:58,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:58,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:58,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:34:58,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:34:58,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:34:58,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:58,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 22:34:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:58,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:34:58,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342015550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:58,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:58,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 47 [2022-03-19 22:34:58,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555046198] [2022-03-19 22:34:58,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:58,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 22:34:58,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:58,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 22:34:58,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1491, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 22:34:58,889 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:00,033 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2022-03-19 22:35:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 22:35:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-19 22:35:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:00,035 INFO L225 Difference]: With dead ends: 96 [2022-03-19 22:35:00,036 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 22:35:00,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2491, Invalid=5165, Unknown=0, NotChecked=0, Total=7656 [2022-03-19 22:35:00,038 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:00,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 49 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:35:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 22:35:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-19 22:35:00,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-19 22:35:00,047 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 50 [2022-03-19 22:35:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:00,047 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-19 22:35:00,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-19 22:35:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-19 22:35:00,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:00,048 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:00,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-19 22:35:00,267 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 [2022-03-19 22:35:00,268 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1921394521, now seen corresponding path program 5 times [2022-03-19 22:35:00,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:00,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106979460] [2022-03-19 22:35:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106979460] [2022-03-19 22:35:01,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106979460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:01,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937872579] [2022-03-19 22:35:01,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:35:01,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:01,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:01,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:35:01,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-03-19 22:35:01,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:01,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 22:35:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:02,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:04,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937872579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:04,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:04,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 104 [2022-03-19 22:35:04,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902957361] [2022-03-19 22:35:04,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:04,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-19 22:35:04,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-19 22:35:04,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2170, Invalid=8542, Unknown=0, NotChecked=0, Total=10712 [2022-03-19 22:35:04,382 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:12,513 INFO L93 Difference]: Finished difference Result 176 states and 215 transitions. [2022-03-19 22:35:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 22:35:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-19 22:35:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:12,515 INFO L225 Difference]: With dead ends: 176 [2022-03-19 22:35:12,515 INFO L226 Difference]: Without dead ends: 171 [2022-03-19 22:35:12,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6310 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=9387, Invalid=24653, Unknown=0, NotChecked=0, Total=34040 [2022-03-19 22:35:12,521 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 220 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:12,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 174 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 22:35:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-19 22:35:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-19 22:35:12,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2022-03-19 22:35:12,533 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 90 [2022-03-19 22:35:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:12,533 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2022-03-19 22:35:12,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2022-03-19 22:35:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-19 22:35:12,538 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:12,538 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:12,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 22:35:12,754 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 [2022-03-19 22:35:12,754 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:12,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1323556009, now seen corresponding path program 6 times [2022-03-19 22:35:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:12,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637083642] [2022-03-19 22:35:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:12,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:14,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637083642] [2022-03-19 22:35:14,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637083642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34684389] [2022-03-19 22:35:14,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:35:14,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:14,589 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:14,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:35:14,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2022-03-19 22:35:14,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-19 22:35:14,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:15,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:20,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34684389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:20,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:20,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 167 [2022-03-19 22:35:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004669035] [2022-03-19 22:35:20,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:20,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-03-19 22:35:20,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-03-19 22:35:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9821, Invalid=17901, Unknown=0, NotChecked=0, Total=27722 [2022-03-19 22:35:20,969 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:39,355 INFO L93 Difference]: Finished difference Result 336 states and 415 transitions. [2022-03-19 22:35:39,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-03-19 22:35:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-03-19 22:35:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:39,359 INFO L225 Difference]: With dead ends: 336 [2022-03-19 22:35:39,359 INFO L226 Difference]: Without dead ends: 331 [2022-03-19 22:35:39,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16602 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=36301, Invalid=70955, Unknown=0, NotChecked=0, Total=107256 [2022-03-19 22:35:39,367 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 483 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:39,368 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 29 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 22:35:39,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-19 22:35:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-03-19 22:35:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0030674846625767) internal successors, (327), 326 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2022-03-19 22:35:39,401 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 170 [2022-03-19 22:35:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:39,401 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2022-03-19 22:35:39,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.9940119760479043) internal successors, (333), 166 states have internal predecessors, (333), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:35:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2022-03-19 22:35:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-03-19 22:35:39,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:39,404 INFO L499 BasicCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:39,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 22:35:39,622 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 [2022-03-19 22:35:39,623 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:39,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1945508023, now seen corresponding path program 7 times [2022-03-19 22:35:39,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:39,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837768783] [2022-03-19 22:35:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:39,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:47,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:47,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837768783] [2022-03-19 22:35:47,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837768783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219833881] [2022-03-19 22:35:47,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:35:47,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:47,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:47,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:47,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 22:35:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:50,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 162 conjunts are in the unsatisfiable core [2022-03-19 22:35:50,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:35:51,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:36:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:36:12,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219833881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:36:12,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:36:12,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 163, 163] total 327 [2022-03-19 22:36:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185261704] [2022-03-19 22:36:12,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:36:12,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 327 states [2022-03-19 22:36:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:36:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 327 interpolants. [2022-03-19 22:36:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38821, Invalid=67781, Unknown=0, NotChecked=0, Total=106602 [2022-03-19 22:36:12,712 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:37:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:37:52,037 INFO L93 Difference]: Finished difference Result 656 states and 815 transitions. [2022-03-19 22:37:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2022-03-19 22:37:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-03-19 22:37:52,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:37:52,042 INFO L225 Difference]: With dead ends: 656 [2022-03-19 22:37:52,042 INFO L226 Difference]: Without dead ends: 651 [2022-03-19 22:37:52,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1145 GetRequests, 498 SyntacticMatches, 1 SemanticMatches, 646 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65202 ImplicationChecksByTransitivity, 123.1s TimeCoverageRelationStatistics Valid=142981, Invalid=276275, Unknown=0, NotChecked=0, Total=419256 [2022-03-19 22:37:52,062 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 1280 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 802 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 802 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:37:52,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 44 Invalid, 1487 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [802 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 22:37:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-19 22:37:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2022-03-19 22:37:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 646 states have (on average 1.001547987616099) internal successors, (647), 646 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:37:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 651 transitions. [2022-03-19 22:37:52,145 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 651 transitions. Word has length 330 [2022-03-19 22:37:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:37:52,146 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 651 transitions. [2022-03-19 22:37:52,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 327 states, 327 states have (on average 1.996941896024465) internal successors, (653), 326 states have internal predecessors, (653), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:37:52,147 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 651 transitions. [2022-03-19 22:37:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-03-19 22:37:52,157 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:37:52,157 INFO L499 BasicCegarLoop]: trace histogram [319, 319, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:37:52,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 22:37:52,375 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 [2022-03-19 22:37:52,376 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:37:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:37:52,376 INFO L85 PathProgramCache]: Analyzing trace with hash -318798985, now seen corresponding path program 8 times [2022-03-19 22:37:52,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:37:52,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894118038] [2022-03-19 22:37:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:37:52,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:37:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:20,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:38:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:38:20,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:38:20,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894118038] [2022-03-19 22:38:20,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894118038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:38:20,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853712873] [2022-03-19 22:38:20,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:38:20,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:38:20,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:38:20,756 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:38:20,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 22:38:36,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:38:36,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:38:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 322 conjunts are in the unsatisfiable core [2022-03-19 22:38:47,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:38:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:38:49,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:40:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 101761 backedges. 0 proven. 101761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:40:06,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853712873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:40:06,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:40:06,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [324, 323, 323] total 647 [2022-03-19 22:40:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049964285] [2022-03-19 22:40:06,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:40:06,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 647 states [2022-03-19 22:40:06,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:40:06,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 647 interpolants. [2022-03-19 22:40:06,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154421, Invalid=263541, Unknown=0, NotChecked=0, Total=417962 [2022-03-19 22:40:06,564 INFO L87 Difference]: Start difference. First operand 651 states and 651 transitions. Second operand has 647 states, 647 states have (on average 1.998454404945904) internal successors, (1293), 646 states have internal predecessors, (1293), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)