/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:03:47,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:03:47,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:03:47,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:03:47,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:03:47,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:03:47,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:03:47,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:03:47,819 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:03:47,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:03:47,820 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:03:47,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:03:47,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:03:47,821 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:03:47,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:03:47,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:03:47,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:03:47,821 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:03:47,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:03:47,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:03:47,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:03:47,822 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:03:47,823 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:03:48,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:03:48,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:03:48,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:03:48,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:03:48,031 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:03:48,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_5.c [2022-04-06 21:03:48,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485e0071c/e2dca61cd5b74209a3690f6faeeabf09/FLAG169d797c9 [2022-04-06 21:03:48,410 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:03:48,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c [2022-04-06 21:03:48,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485e0071c/e2dca61cd5b74209a3690f6faeeabf09/FLAG169d797c9 [2022-04-06 21:03:48,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/485e0071c/e2dca61cd5b74209a3690f6faeeabf09 [2022-04-06 21:03:48,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:03:48,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:03:48,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:03:48,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:03:48,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:03:48,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:03:48" (1/1) ... [2022-04-06 21:03:48,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11f9227b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:48, skipping insertion in model container [2022-04-06 21:03:48,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:03:48" (1/1) ... [2022-04-06 21:03:48,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:03:48,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:03:48,997 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-simple/nested_5.c[899,912] [2022-04-06 21:03:49,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:03:49,018 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:03:49,032 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-simple/nested_5.c[899,912] [2022-04-06 21:03:49,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:03:49,041 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:03:49,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49 WrapperNode [2022-04-06 21:03:49,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:03:49,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:03:49,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:03:49,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:03:49,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (1/1) ... [2022-04-06 21:03:49,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (1/1) ... [2022-04-06 21:03:49,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (1/1) ... [2022-04-06 21:03:49,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (1/1) ... [2022-04-06 21:03:49,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (1/1) ... [2022-04-06 21:03:49,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (1/1) ... [2022-04-06 21:03:49,075 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (1/1) ... [2022-04-06 21:03:49,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:03:49,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:03:49,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:03:49,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:03:49,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (1/1) ... [2022-04-06 21:03:49,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:03:49,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:49,107 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) [2022-04-06 21:03:49,130 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 [2022-04-06 21:03:49,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:03:49,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:03:49,141 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:03:49,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:03:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:03:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:03:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:03:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:03:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:03:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:03:49,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:03:49,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:03:49,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:03:49,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:03:49,188 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:03:49,190 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:03:49,309 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:03:49,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:03:49,313 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-04-06 21:03:49,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:03:49 BoogieIcfgContainer [2022-04-06 21:03:49,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:03:49,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:03:49,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:03:49,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:03:49,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:03:48" (1/3) ... [2022-04-06 21:03:49,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca57df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:03:49, skipping insertion in model container [2022-04-06 21:03:49,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:03:49" (2/3) ... [2022-04-06 21:03:49,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca57df3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:03:49, skipping insertion in model container [2022-04-06 21:03:49,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:03:49" (3/3) ... [2022-04-06 21:03:49,320 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_5.c [2022-04-06 21:03:49,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:03:49,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:03:49,369 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:03:49,374 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-04-06 21:03:49,374 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:03:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:03:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-04-06 21:03:49,388 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:49,389 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:49,389 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:49,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1327885715, now seen corresponding path program 1 times [2022-04-06 21:03:49,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:49,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1691240724] [2022-04-06 21:03:49,413 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:03:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1327885715, now seen corresponding path program 2 times [2022-04-06 21:03:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:49,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085472295] [2022-04-06 21:03:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:49,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:49,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:49,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:49,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085472295] [2022-04-06 21:03:49,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085472295] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:49,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:49,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:03:49,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:49,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1691240724] [2022-04-06 21:03:49,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1691240724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:49,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:49,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:03:49,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29993813] [2022-04-06 21:03:49,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:49,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:03:49,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:49,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:03:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:03:49,559 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:49,595 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-04-06 21:03:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:03:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-04-06 21:03:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:49,602 INFO L225 Difference]: With dead ends: 42 [2022-04-06 21:03:49,602 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 21:03:49,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:03:49,607 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:49,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 21:03:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 21:03:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-04-06 21:03:49,637 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-04-06 21:03:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:49,637 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-04-06 21:03:49,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-04-06 21:03:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-04-06 21:03:49,638 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:49,638 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:49,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:03:49,639 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:49,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1327937609, now seen corresponding path program 1 times [2022-04-06 21:03:49,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:49,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [501667235] [2022-04-06 21:03:49,642 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:03:49,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1327937609, now seen corresponding path program 2 times [2022-04-06 21:03:49,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:49,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338916717] [2022-04-06 21:03:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:49,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:49,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:49,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:49,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338916717] [2022-04-06 21:03:49,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338916717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:49,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:49,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:49,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:49,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [501667235] [2022-04-06 21:03:49,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [501667235] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:49,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:49,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:49,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148092389] [2022-04-06 21:03:49,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:49,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:49,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:49,713 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:49,758 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-04-06 21:03:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:49,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-04-06 21:03:49,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:49,760 INFO L225 Difference]: With dead ends: 32 [2022-04-06 21:03:49,760 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 21:03:49,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:03:49,763 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:49,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 21:03:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-04-06 21:03:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-04-06 21:03:49,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-04-06 21:03:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:49,778 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-04-06 21:03:49,782 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-04-06 21:03:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 21:03:49,782 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:49,783 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:49,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 21:03:49,783 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 365342218, now seen corresponding path program 1 times [2022-04-06 21:03:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:49,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606678783] [2022-04-06 21:03:49,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:49,798 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash 365342218, now seen corresponding path program 2 times [2022-04-06 21:03:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852986299] [2022-04-06 21:03:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:49,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:49,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:49,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:49,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852986299] [2022-04-06 21:03:49,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852986299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:49,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:49,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:49,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:49,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606678783] [2022-04-06 21:03:49,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606678783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:49,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:49,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:49,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029989597] [2022-04-06 21:03:49,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:49,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:49,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:49,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:49,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:49,866 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:49,920 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-04-06 21:03:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:49,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 21:03:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:49,921 INFO L225 Difference]: With dead ends: 41 [2022-04-06 21:03:49,921 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 21:03:49,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:03:49,922 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:49,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 21:03:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-04-06 21:03:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-04-06 21:03:49,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-04-06 21:03:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:49,926 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-04-06 21:03:49,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-04-06 21:03:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 21:03:49,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:49,927 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:49,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 21:03:49,927 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash -903990269, now seen corresponding path program 1 times [2022-04-06 21:03:49,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:49,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149043294] [2022-04-06 21:03:49,934 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:49,937 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:49,937 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash -903990269, now seen corresponding path program 2 times [2022-04-06 21:03:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826386920] [2022-04-06 21:03:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:49,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:49,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:49,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826386920] [2022-04-06 21:03:49,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826386920] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:49,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:49,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:49,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:49,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149043294] [2022-04-06 21:03:49,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149043294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:49,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:49,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:49,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890128275] [2022-04-06 21:03:49,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:49,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:49,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:49,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:49,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:49,989 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:50,042 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-04-06 21:03:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 21:03:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:50,044 INFO L225 Difference]: With dead ends: 41 [2022-04-06 21:03:50,044 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 21:03:50,044 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:03:50,045 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:50,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 21:03:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-04-06 21:03:50,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-04-06 21:03:50,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-04-06 21:03:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:50,051 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-04-06 21:03:50,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-04-06 21:03:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 21:03:50,052 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:50,052 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:50,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 21:03:50,052 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:50,053 INFO L85 PathProgramCache]: Analyzing trace with hash 761147182, now seen corresponding path program 1 times [2022-04-06 21:03:50,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:50,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1908510432] [2022-04-06 21:03:50,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,064 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,067 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,067 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:50,067 INFO L85 PathProgramCache]: Analyzing trace with hash 761147182, now seen corresponding path program 2 times [2022-04-06 21:03:50,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:50,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688531678] [2022-04-06 21:03:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:50,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:50,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:50,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688531678] [2022-04-06 21:03:50,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688531678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:50,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:50,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:50,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:50,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1908510432] [2022-04-06 21:03:50,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1908510432] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:50,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:50,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31806816] [2022-04-06 21:03:50,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:50,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:50,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:50,135 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:50,182 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-04-06 21:03:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:50,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 21:03:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:50,183 INFO L225 Difference]: With dead ends: 41 [2022-04-06 21:03:50,183 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 21:03:50,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:03:50,184 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:50,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 21:03:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-04-06 21:03:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-04-06 21:03:50,212 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2022-04-06 21:03:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:50,212 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-04-06 21:03:50,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-04-06 21:03:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 21:03:50,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:50,213 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:50,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-06 21:03:50,213 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:50,214 INFO L85 PathProgramCache]: Analyzing trace with hash 317096575, now seen corresponding path program 1 times [2022-04-06 21:03:50,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:50,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [276434989] [2022-04-06 21:03:50,232 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,237 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,237 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:50,237 INFO L85 PathProgramCache]: Analyzing trace with hash 317096575, now seen corresponding path program 2 times [2022-04-06 21:03:50,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:50,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710212886] [2022-04-06 21:03:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:50,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:50,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:50,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710212886] [2022-04-06 21:03:50,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710212886] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:50,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:50,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:50,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:50,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [276434989] [2022-04-06 21:03:50,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [276434989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:50,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:50,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 21:03:50,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471059446] [2022-04-06 21:03:50,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:50,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 21:03:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 21:03:50,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 21:03:50,288 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:50,325 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-04-06 21:03:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 21:03:50,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 21:03:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:50,327 INFO L225 Difference]: With dead ends: 41 [2022-04-06 21:03:50,327 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 21:03:50,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:03:50,329 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:50,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:50,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 21:03:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-04-06 21:03:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-04-06 21:03:50,341 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 21 [2022-04-06 21:03:50,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:50,341 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-04-06 21:03:50,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-04-06 21:03:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:03:50,342 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:50,342 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:50,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-04-06 21:03:50,343 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:50,343 INFO L85 PathProgramCache]: Analyzing trace with hash 720998685, now seen corresponding path program 1 times [2022-04-06 21:03:50,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:50,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1093926528] [2022-04-06 21:03:50,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,402 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,402 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash 720998685, now seen corresponding path program 2 times [2022-04-06 21:03:50,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:50,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217005807] [2022-04-06 21:03:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:50,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:50,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:50,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217005807] [2022-04-06 21:03:50,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217005807] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:50,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316946308] [2022-04-06 21:03:50,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:50,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:50,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:50,461 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) [2022-04-06 21:03:50,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:03:50,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:50,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:50,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:03:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:50,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:50,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316946308] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:50,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:50,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 21:03:50,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:50,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1093926528] [2022-04-06 21:03:50,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1093926528] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:50,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:50,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:50,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543222583] [2022-04-06 21:03:50,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:50,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:50,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:03:50,622 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:50,668 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-04-06 21:03:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:50,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 21:03:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:50,669 INFO L225 Difference]: With dead ends: 44 [2022-04-06 21:03:50,669 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 21:03:50,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:50,673 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:50,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:50,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 21:03:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 21:03:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-04-06 21:03:50,682 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 23 [2022-04-06 21:03:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:50,683 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-04-06 21:03:50,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-06 21:03:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 21:03:50,683 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:50,683 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:50,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 21:03:50,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:50,892 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1971097541, now seen corresponding path program 3 times [2022-04-06 21:03:50,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:50,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2087074525] [2022-04-06 21:03:50,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,939 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:50,942 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:50,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1971097541, now seen corresponding path program 4 times [2022-04-06 21:03:50,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:50,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171987438] [2022-04-06 21:03:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:50,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:03:50,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171987438] [2022-04-06 21:03:50,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171987438] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127097335] [2022-04-06 21:03:50,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:50,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:50,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:50,974 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) [2022-04-06 21:03:50,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:03:51,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:51,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:51,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:51,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:51,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:03:51,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127097335] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:51,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:51,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 21:03:51,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:51,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2087074525] [2022-04-06 21:03:51,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2087074525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:51,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:51,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:51,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082252043] [2022-04-06 21:03:51,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:51,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:51,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:03:51,130 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:51,168 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-04-06 21:03:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:51,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 21:03:51,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:51,168 INFO L225 Difference]: With dead ends: 58 [2022-04-06 21:03:51,168 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 21:03:51,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:51,169 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:51,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 21:03:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-04-06 21:03:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-04-06 21:03:51,174 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 25 [2022-04-06 21:03:51,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:51,174 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-04-06 21:03:51,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-04-06 21:03:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:03:51,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:51,175 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:51,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:51,391 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,SelfDestructingSolverStorable7 [2022-04-06 21:03:51,392 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:51,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2089965198, now seen corresponding path program 5 times [2022-04-06 21:03:51,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:51,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617798311] [2022-04-06 21:03:51,474 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:51,475 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:51,475 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:51,475 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:51,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:51,478 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:51,478 INFO L85 PathProgramCache]: Analyzing trace with hash 2089965198, now seen corresponding path program 6 times [2022-04-06 21:03:51,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:51,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534834975] [2022-04-06 21:03:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:51,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:51,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 21:03:51,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:51,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534834975] [2022-04-06 21:03:51,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534834975] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:51,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072760215] [2022-04-06 21:03:51,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:51,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:51,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:51,540 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) [2022-04-06 21:03:51,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:03:51,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:03:51,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:51,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 21:03:51,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 21:03:51,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 21:03:51,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072760215] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:51,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:51,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-04-06 21:03:51,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:51,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617798311] [2022-04-06 21:03:51,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617798311] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:51,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:51,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286285241] [2022-04-06 21:03:51,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:51,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:03:51,683 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:51,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:51,727 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-04-06 21:03:51,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:51,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 21:03:51,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:51,729 INFO L225 Difference]: With dead ends: 92 [2022-04-06 21:03:51,729 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 21:03:51,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:03:51,731 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:51,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 33 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 21:03:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2022-04-06 21:03:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-04-06 21:03:51,745 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 32 [2022-04-06 21:03:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:51,746 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-04-06 21:03:51,746 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-04-06 21:03:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:03:51,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:51,749 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:51,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:51,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:51,970 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:51,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1680065693, now seen corresponding path program 7 times [2022-04-06 21:03:51,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:51,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [607392749] [2022-04-06 21:03:52,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:52,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:52,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:52,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:52,129 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1680065693, now seen corresponding path program 8 times [2022-04-06 21:03:52,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:52,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215073814] [2022-04-06 21:03:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:52,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:52,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 21:03:52,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:52,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215073814] [2022-04-06 21:03:52,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215073814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:52,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245676073] [2022-04-06 21:03:52,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:52,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:52,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:52,176 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) [2022-04-06 21:03:52,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:03:52,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:52,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:52,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:52,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 21:03:52,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 21:03:52,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245676073] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:52,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:52,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 21:03:52,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:52,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [607392749] [2022-04-06 21:03:52,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [607392749] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:52,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:52,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:52,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342006666] [2022-04-06 21:03:52,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:52,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:03:52,340 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:52,401 INFO L93 Difference]: Finished difference Result 166 states and 197 transitions. [2022-04-06 21:03:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 21:03:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:52,403 INFO L225 Difference]: With dead ends: 166 [2022-04-06 21:03:52,403 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 21:03:52,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:52,404 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:52,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 33 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:52,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 21:03:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2022-04-06 21:03:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 83 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-04-06 21:03:52,427 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 49 [2022-04-06 21:03:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:52,428 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-04-06 21:03:52,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-04-06 21:03:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 21:03:52,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:52,432 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:52,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:52,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:52,651 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:52,652 INFO L85 PathProgramCache]: Analyzing trace with hash 82002346, now seen corresponding path program 9 times [2022-04-06 21:03:52,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:52,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [749121430] [2022-04-06 21:03:52,963 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:52,963 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:52,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:52,972 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash 82002346, now seen corresponding path program 10 times [2022-04-06 21:03:52,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:52,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38987405] [2022-04-06 21:03:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:52,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:53,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2022-04-06 21:03:53,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:53,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38987405] [2022-04-06 21:03:53,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38987405] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:53,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646111473] [2022-04-06 21:03:53,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:53,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:53,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:53,049 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) [2022-04-06 21:03:53,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:03:53,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:53,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:53,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 110 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 21:03:53,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 110 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-04-06 21:03:53,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646111473] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:53,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:53,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 21:03:53,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [749121430] [2022-04-06 21:03:53,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [749121430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:53,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:53,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:03:53,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133959795] [2022-04-06 21:03:53,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:53,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:03:53,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:03:53,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:03:53,346 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:53,407 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2022-04-06 21:03:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:03:53,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-04-06 21:03:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:53,409 INFO L225 Difference]: With dead ends: 243 [2022-04-06 21:03:53,409 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 21:03:53,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:53,411 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:53,411 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 33 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 21:03:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 164. [2022-04-06 21:03:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2022-04-06 21:03:53,432 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 86 [2022-04-06 21:03:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:53,432 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2022-04-06 21:03:53,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2022-04-06 21:03:53,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 21:03:53,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:53,437 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:53,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:53,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 21:03:53,652 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:53,652 INFO L85 PathProgramCache]: Analyzing trace with hash 337535639, now seen corresponding path program 11 times [2022-04-06 21:03:53,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:53,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107696881] [2022-04-06 21:03:54,236 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:54,246 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:54,246 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash 337535639, now seen corresponding path program 12 times [2022-04-06 21:03:54,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:54,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604506837] [2022-04-06 21:03:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:54,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:54,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 236 proven. 4 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-04-06 21:03:54,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604506837] [2022-04-06 21:03:54,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604506837] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:54,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932408174] [2022-04-06 21:03:54,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:54,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:54,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:54,316 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) [2022-04-06 21:03:54,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:03:54,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 21:03:54,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:54,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:03:54,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 991 proven. 4 refuted. 0 times theorem prover too weak. 1144 trivial. 0 not checked. [2022-04-06 21:03:54,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2139 backedges. 991 proven. 4 refuted. 0 times theorem prover too weak. 1144 trivial. 0 not checked. [2022-04-06 21:03:54,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932408174] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:54,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:54,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:03:54,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:54,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107696881] [2022-04-06 21:03:54,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107696881] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:54,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:54,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:03:54,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075416011] [2022-04-06 21:03:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:54,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:03:54,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:54,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:03:54,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:54,822 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:54,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:54,897 INFO L93 Difference]: Finished difference Result 361 states and 436 transitions. [2022-04-06 21:03:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:03:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 21:03:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:54,898 INFO L225 Difference]: With dead ends: 361 [2022-04-06 21:03:54,898 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 21:03:54,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:03:54,899 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:54,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 38 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:54,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 21:03:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 196. [2022-04-06 21:03:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.1614583333333333) internal successors, (223), 192 states have internal predecessors, (223), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 226 transitions. [2022-04-06 21:03:54,917 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 226 transitions. Word has length 163 [2022-04-06 21:03:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:54,917 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 226 transitions. [2022-04-06 21:03:54,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 226 transitions. [2022-04-06 21:03:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 21:03:54,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:54,918 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:54,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:55,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:55,132 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:55,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:55,132 INFO L85 PathProgramCache]: Analyzing trace with hash 544180375, now seen corresponding path program 13 times [2022-04-06 21:03:55,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:55,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930684594] [2022-04-06 21:03:55,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:55,655 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:55,655 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash 544180375, now seen corresponding path program 14 times [2022-04-06 21:03:55,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:55,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459591477] [2022-04-06 21:03:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:55,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:55,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 416 proven. 9 refuted. 0 times theorem prover too weak. 3234 trivial. 0 not checked. [2022-04-06 21:03:55,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459591477] [2022-04-06 21:03:55,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459591477] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:55,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437730099] [2022-04-06 21:03:55,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:03:55,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:55,737 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) [2022-04-06 21:03:55,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:03:55,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:03:55,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:55,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:03:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 416 proven. 9 refuted. 0 times theorem prover too weak. 3234 trivial. 0 not checked. [2022-04-06 21:03:56,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3659 backedges. 416 proven. 9 refuted. 0 times theorem prover too weak. 3234 trivial. 0 not checked. [2022-04-06 21:03:56,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437730099] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:56,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:56,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:03:56,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930684594] [2022-04-06 21:03:56,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930684594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:56,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:56,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:03:56,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465788409] [2022-04-06 21:03:56,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:56,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:03:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:03:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:56,290 INFO L87 Difference]: Start difference. First operand 196 states and 226 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:56,358 INFO L93 Difference]: Finished difference Result 423 states and 498 transitions. [2022-04-06 21:03:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:03:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-04-06 21:03:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:56,359 INFO L225 Difference]: With dead ends: 423 [2022-04-06 21:03:56,359 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 21:03:56,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:03:56,360 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:56,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:56,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 21:03:56,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 228. [2022-04-06 21:03:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 224 states have internal predecessors, (255), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 258 transitions. [2022-04-06 21:03:56,380 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 258 transitions. Word has length 195 [2022-04-06 21:03:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:56,380 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 258 transitions. [2022-04-06 21:03:56,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 258 transitions. [2022-04-06 21:03:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 21:03:56,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:56,381 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:56,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:56,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:56,597 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1890013545, now seen corresponding path program 15 times [2022-04-06 21:03:56,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:56,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431585343] [2022-04-06 21:03:57,073 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:57,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:57,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1890013545, now seen corresponding path program 16 times [2022-04-06 21:03:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776185100] [2022-04-06 21:03:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:57,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:57,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5691 backedges. 656 proven. 16 refuted. 0 times theorem prover too weak. 5019 trivial. 0 not checked. [2022-04-06 21:03:57,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:57,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776185100] [2022-04-06 21:03:57,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776185100] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:57,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965297429] [2022-04-06 21:03:57,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:03:57,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:57,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:57,147 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) [2022-04-06 21:03:57,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:03:57,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:03:57,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:57,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:03:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5691 backedges. 656 proven. 16 refuted. 0 times theorem prover too weak. 5019 trivial. 0 not checked. [2022-04-06 21:03:57,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5691 backedges. 656 proven. 16 refuted. 0 times theorem prover too weak. 5019 trivial. 0 not checked. [2022-04-06 21:03:57,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965297429] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:57,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:57,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:03:57,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [431585343] [2022-04-06 21:03:57,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [431585343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:57,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:57,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:03:57,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937724722] [2022-04-06 21:03:57,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:57,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:03:57,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:57,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:03:57,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:57,767 INFO L87 Difference]: Start difference. First operand 228 states and 258 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:57,855 INFO L93 Difference]: Finished difference Result 485 states and 560 transitions. [2022-04-06 21:03:57,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:03:57,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-04-06 21:03:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:57,856 INFO L225 Difference]: With dead ends: 485 [2022-04-06 21:03:57,856 INFO L226 Difference]: Without dead ends: 276 [2022-04-06 21:03:57,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:03:57,858 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:57,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 43 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-04-06 21:03:57,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 260. [2022-04-06 21:03:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 256 states have (on average 1.12109375) internal successors, (287), 256 states have internal predecessors, (287), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 290 transitions. [2022-04-06 21:03:57,881 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 290 transitions. Word has length 227 [2022-04-06 21:03:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:57,881 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 290 transitions. [2022-04-06 21:03:57,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 290 transitions. [2022-04-06 21:03:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-04-06 21:03:57,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:57,883 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:57,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:58,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 21:03:58,099 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:58,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2032544617, now seen corresponding path program 17 times [2022-04-06 21:03:58,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:58,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1301507653] [2022-04-06 21:03:58,575 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:58,585 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:03:58,586 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:03:58,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2032544617, now seen corresponding path program 18 times [2022-04-06 21:03:58,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:03:58,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068637814] [2022-04-06 21:03:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:03:58,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:03:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:58,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:03:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:03:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8235 backedges. 956 proven. 25 refuted. 0 times theorem prover too weak. 7254 trivial. 0 not checked. [2022-04-06 21:03:58,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:03:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068637814] [2022-04-06 21:03:58,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068637814] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:03:58,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705486217] [2022-04-06 21:03:58,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:03:58,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:03:58,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:03:58,644 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:03:58,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:03:58,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2022-04-06 21:03:58,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:03:58,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:03:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:03:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8235 backedges. 3823 proven. 25 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2022-04-06 21:03:58,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:03:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8235 backedges. 3823 proven. 25 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2022-04-06 21:03:59,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705486217] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:03:59,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:03:59,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:03:59,251 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:03:59,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1301507653] [2022-04-06 21:03:59,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1301507653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:03:59,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:03:59,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:03:59,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835716771] [2022-04-06 21:03:59,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:03:59,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:03:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:59,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:03:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:03:59,252 INFO L87 Difference]: Start difference. First operand 260 states and 290 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:03:59,362 INFO L93 Difference]: Finished difference Result 531 states and 606 transitions. [2022-04-06 21:03:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:03:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-04-06 21:03:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:03:59,363 INFO L225 Difference]: With dead ends: 531 [2022-04-06 21:03:59,363 INFO L226 Difference]: Without dead ends: 292 [2022-04-06 21:03:59,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 518 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:03:59,364 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:03:59,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:03:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-04-06 21:03:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-04-06 21:03:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 288 states have (on average 1.1076388888888888) internal successors, (319), 288 states have internal predecessors, (319), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 322 transitions. [2022-04-06 21:03:59,392 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 322 transitions. Word has length 259 [2022-04-06 21:03:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:03:59,393 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 322 transitions. [2022-04-06 21:03:59,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:03:59,393 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 322 transitions. [2022-04-06 21:03:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-04-06 21:03:59,395 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:03:59,395 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:03:59,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:03:59,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 21:03:59,607 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:03:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:03:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash -319620457, now seen corresponding path program 19 times [2022-04-06 21:03:59,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:03:59,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019363031] [2022-04-06 21:04:00,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:00,130 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:00,130 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash -319620457, now seen corresponding path program 20 times [2022-04-06 21:04:00,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:00,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153152594] [2022-04-06 21:04:00,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:00,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:00,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11291 backedges. 2489 proven. 89 refuted. 0 times theorem prover too weak. 8713 trivial. 0 not checked. [2022-04-06 21:04:00,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153152594] [2022-04-06 21:04:00,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153152594] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:00,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928913775] [2022-04-06 21:04:00,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:00,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:00,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:00,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:00,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:04:00,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:00,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:04:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11291 backedges. 2489 proven. 89 refuted. 0 times theorem prover too weak. 8713 trivial. 0 not checked. [2022-04-06 21:04:00,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11291 backedges. 2489 proven. 89 refuted. 0 times theorem prover too weak. 8713 trivial. 0 not checked. [2022-04-06 21:04:00,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928913775] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:00,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:00,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:04:00,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:00,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019363031] [2022-04-06 21:04:00,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019363031] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:00,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:00,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:04:00,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648081521] [2022-04-06 21:04:00,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:00,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:04:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:00,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:04:00,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:00,943 INFO L87 Difference]: Start difference. First operand 292 states and 322 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:01,055 INFO L93 Difference]: Finished difference Result 776 states and 857 transitions. [2022-04-06 21:04:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:04:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-04-06 21:04:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:01,057 INFO L225 Difference]: With dead ends: 776 [2022-04-06 21:04:01,057 INFO L226 Difference]: Without dead ends: 524 [2022-04-06 21:04:01,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:04:01,058 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:01,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 38 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-04-06 21:04:01,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 412. [2022-04-06 21:04:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 408 states have (on average 1.0955882352941178) internal successors, (447), 408 states have internal predecessors, (447), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 450 transitions. [2022-04-06 21:04:01,097 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 450 transitions. Word has length 291 [2022-04-06 21:04:01,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:01,097 INFO L478 AbstractCegarLoop]: Abstraction has 412 states and 450 transitions. [2022-04-06 21:04:01,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:01,098 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 450 transitions. [2022-04-06 21:04:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-04-06 21:04:01,110 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:01,110 INFO L499 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:01,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:01,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 21:04:01,315 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:01,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:01,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1897232105, now seen corresponding path program 21 times [2022-04-06 21:04:01,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:01,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1263909375] [2022-04-06 21:04:01,831 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:01,854 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:01,854 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1897232105, now seen corresponding path program 22 times [2022-04-06 21:04:01,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:01,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083710631] [2022-04-06 21:04:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:01,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:01,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25215 backedges. 5548 proven. 264 refuted. 0 times theorem prover too weak. 19403 trivial. 0 not checked. [2022-04-06 21:04:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:01,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083710631] [2022-04-06 21:04:01,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083710631] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:01,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129051807] [2022-04-06 21:04:01,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:01,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:01,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:01,932 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:01,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:04:02,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:02,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:04:02,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25215 backedges. 5548 proven. 264 refuted. 0 times theorem prover too weak. 19403 trivial. 0 not checked. [2022-04-06 21:04:02,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25215 backedges. 5548 proven. 264 refuted. 0 times theorem prover too weak. 19403 trivial. 0 not checked. [2022-04-06 21:04:02,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129051807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:02,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:02,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:04:02,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:02,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1263909375] [2022-04-06 21:04:02,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1263909375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:02,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:02,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:04:02,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652236952] [2022-04-06 21:04:02,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:02,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:04:02,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:02,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:04:02,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:02,971 INFO L87 Difference]: Start difference. First operand 412 states and 450 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:03,104 INFO L93 Difference]: Finished difference Result 1001 states and 1097 transitions. [2022-04-06 21:04:03,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:04:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-04-06 21:04:03,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:03,107 INFO L225 Difference]: With dead ends: 1001 [2022-04-06 21:04:03,107 INFO L226 Difference]: Without dead ends: 644 [2022-04-06 21:04:03,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 833 GetRequests, 820 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:04:03,109 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:03,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 33 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-04-06 21:04:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 532. [2022-04-06 21:04:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 528 states have (on average 1.0890151515151516) internal successors, (575), 528 states have internal predecessors, (575), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 578 transitions. [2022-04-06 21:04:03,163 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 578 transitions. Word has length 411 [2022-04-06 21:04:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:03,163 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 578 transitions. [2022-04-06 21:04:03,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 578 transitions. [2022-04-06 21:04:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-04-06 21:04:03,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:03,166 INFO L499 BasicCegarLoop]: trace histogram [192, 192, 32, 32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:03,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:03,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:04:03,383 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 425498519, now seen corresponding path program 23 times [2022-04-06 21:04:03,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:03,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704282702] [2022-04-06 21:04:03,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:03,959 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:03,959 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash 425498519, now seen corresponding path program 24 times [2022-04-06 21:04:03,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:03,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460897771] [2022-04-06 21:04:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:03,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:04,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 44707 backedges. 9825 proven. 526 refuted. 0 times theorem prover too weak. 34356 trivial. 0 not checked. [2022-04-06 21:04:04,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:04,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460897771] [2022-04-06 21:04:04,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460897771] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:04,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886710366] [2022-04-06 21:04:04,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:04,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:04,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:04,064 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:04,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:04:04,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-04-06 21:04:04,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:04:04,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 44707 backedges. 23874 proven. 526 refuted. 0 times theorem prover too weak. 20307 trivial. 0 not checked. [2022-04-06 21:04:04,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 44707 backedges. 23874 proven. 526 refuted. 0 times theorem prover too weak. 20307 trivial. 0 not checked. [2022-04-06 21:04:05,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886710366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:05,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:05,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:04:05,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:05,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704282702] [2022-04-06 21:04:05,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704282702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:05,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:05,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:04:05,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855649276] [2022-04-06 21:04:05,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:05,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:04:05,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:05,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:04:05,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:05,279 INFO L87 Difference]: Start difference. First operand 532 states and 578 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:05,432 INFO L93 Difference]: Finished difference Result 1226 states and 1337 transitions. [2022-04-06 21:04:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:04:05,432 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-04-06 21:04:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:05,434 INFO L225 Difference]: With dead ends: 1226 [2022-04-06 21:04:05,435 INFO L226 Difference]: Without dead ends: 764 [2022-04-06 21:04:05,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 1061 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:04:05,436 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:05,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-04-06 21:04:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 652. [2022-04-06 21:04:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 648 states have (on average 1.0848765432098766) internal successors, (703), 648 states have internal predecessors, (703), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2022-04-06 21:04:05,525 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 531 [2022-04-06 21:04:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:05,525 INFO L478 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2022-04-06 21:04:05,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2022-04-06 21:04:05,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-04-06 21:04:05,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:05,529 INFO L499 BasicCegarLoop]: trace histogram [240, 240, 40, 40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:05,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:05,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:04:05,744 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 307308055, now seen corresponding path program 25 times [2022-04-06 21:04:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134244042] [2022-04-06 21:04:06,258 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:06,320 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:06,320 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:06,321 INFO L85 PathProgramCache]: Analyzing trace with hash 307308055, now seen corresponding path program 26 times [2022-04-06 21:04:06,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:06,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657961985] [2022-04-06 21:04:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:06,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:06,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 69767 backedges. 15320 proven. 875 refuted. 0 times theorem prover too weak. 53572 trivial. 0 not checked. [2022-04-06 21:04:06,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:06,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657961985] [2022-04-06 21:04:06,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657961985] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:06,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960622709] [2022-04-06 21:04:06,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:06,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:06,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:06,474 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:06,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:04:06,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:06,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:04:06,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 69767 backedges. 15320 proven. 875 refuted. 0 times theorem prover too weak. 53572 trivial. 0 not checked. [2022-04-06 21:04:07,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 69767 backedges. 15320 proven. 875 refuted. 0 times theorem prover too weak. 53572 trivial. 0 not checked. [2022-04-06 21:04:07,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960622709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:07,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:07,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:04:07,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:07,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134244042] [2022-04-06 21:04:07,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134244042] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:07,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:07,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:04:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842687906] [2022-04-06 21:04:07,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:07,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:04:07,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:04:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:07,996 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:08,184 INFO L93 Difference]: Finished difference Result 1339 states and 1457 transitions. [2022-04-06 21:04:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:04:08,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 651 [2022-04-06 21:04:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:08,187 INFO L225 Difference]: With dead ends: 1339 [2022-04-06 21:04:08,187 INFO L226 Difference]: Without dead ends: 772 [2022-04-06 21:04:08,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1317 GetRequests, 1302 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:04:08,188 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:08,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 43 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:08,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-04-06 21:04:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 772. [2022-04-06 21:04:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 768 states have (on average 1.08203125) internal successors, (831), 768 states have internal predecessors, (831), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 834 transitions. [2022-04-06 21:04:08,274 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 834 transitions. Word has length 651 [2022-04-06 21:04:08,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:08,274 INFO L478 AbstractCegarLoop]: Abstraction has 772 states and 834 transitions. [2022-04-06 21:04:08,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 834 transitions. [2022-04-06 21:04:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-04-06 21:04:08,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:08,279 INFO L499 BasicCegarLoop]: trace histogram [288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:08,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 21:04:08,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:08,491 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1099707543, now seen corresponding path program 27 times [2022-04-06 21:04:08,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712093421] [2022-04-06 21:04:09,621 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:09,717 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:09,717 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1099707543, now seen corresponding path program 28 times [2022-04-06 21:04:09,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:09,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224795663] [2022-04-06 21:04:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:09,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 100395 backedges. 37786 proven. 3149 refuted. 0 times theorem prover too weak. 59460 trivial. 0 not checked. [2022-04-06 21:04:09,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224795663] [2022-04-06 21:04:09,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224795663] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319448636] [2022-04-06 21:04:09,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:09,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:09,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:09,956 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:09,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:04:10,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:10,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:10,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:04:10,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 100395 backedges. 37786 proven. 3149 refuted. 0 times theorem prover too weak. 59460 trivial. 0 not checked. [2022-04-06 21:04:10,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 100395 backedges. 37786 proven. 3149 refuted. 0 times theorem prover too weak. 59460 trivial. 0 not checked. [2022-04-06 21:04:11,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319448636] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:11,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:11,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 21:04:11,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712093421] [2022-04-06 21:04:11,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712093421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:11,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:11,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:04:11,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271034545] [2022-04-06 21:04:11,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:11,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:04:11,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:04:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:11,809 INFO L87 Difference]: Start difference. First operand 772 states and 834 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:12,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:12,014 INFO L93 Difference]: Finished difference Result 2089 states and 2258 transitions. [2022-04-06 21:04:12,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:04:12,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 771 [2022-04-06 21:04:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:12,021 INFO L225 Difference]: With dead ends: 2089 [2022-04-06 21:04:12,021 INFO L226 Difference]: Without dead ends: 1512 [2022-04-06 21:04:12,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1551 GetRequests, 1540 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:04:12,023 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:12,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 28 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2022-04-06 21:04:12,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1144. [2022-04-06 21:04:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1140 states have (on average 1.0798245614035087) internal successors, (1231), 1140 states have internal predecessors, (1231), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1234 transitions. [2022-04-06 21:04:12,184 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1234 transitions. Word has length 771 [2022-04-06 21:04:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:12,185 INFO L478 AbstractCegarLoop]: Abstraction has 1144 states and 1234 transitions. [2022-04-06 21:04:12,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1234 transitions. [2022-04-06 21:04:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1144 [2022-04-06 21:04:12,194 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:12,194 INFO L499 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:12,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:12,412 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:12,412 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1050458793, now seen corresponding path program 29 times [2022-04-06 21:04:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:12,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802429733] [2022-04-06 21:04:13,428 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:13,578 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:13,578 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:13,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1050458793, now seen corresponding path program 30 times [2022-04-06 21:04:13,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:13,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13806128] [2022-04-06 21:04:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:13,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:13,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 226105 backedges. 84997 proven. 9444 refuted. 0 times theorem prover too weak. 131664 trivial. 0 not checked. [2022-04-06 21:04:13,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13806128] [2022-04-06 21:04:13,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13806128] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330291927] [2022-04-06 21:04:13,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:13,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:13,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:13,864 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:13,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:04:14,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 193 check-sat command(s) [2022-04-06 21:04:14,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:14,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:04:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 226105 backedges. 85001 proven. 9444 refuted. 0 times theorem prover too weak. 131660 trivial. 0 not checked. [2022-04-06 21:04:15,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 226105 backedges. 85001 proven. 9444 refuted. 0 times theorem prover too weak. 131660 trivial. 0 not checked. [2022-04-06 21:04:16,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330291927] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:16,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:16,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-06 21:04:16,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:16,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802429733] [2022-04-06 21:04:16,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802429733] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:16,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:16,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:04:16,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420818552] [2022-04-06 21:04:16,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:16,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:04:16,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:16,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:04:16,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:16,447 INFO L87 Difference]: Start difference. First operand 1144 states and 1234 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:16,756 INFO L93 Difference]: Finished difference Result 2740 states and 2958 transitions. [2022-04-06 21:04:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:04:16,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1143 [2022-04-06 21:04:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:16,761 INFO L225 Difference]: With dead ends: 2740 [2022-04-06 21:04:16,761 INFO L226 Difference]: Without dead ends: 1884 [2022-04-06 21:04:16,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2297 GetRequests, 2284 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:04:16,763 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:16,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-04-06 21:04:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1516. [2022-04-06 21:04:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1512 states have (on average 1.0787037037037037) internal successors, (1631), 1512 states have internal predecessors, (1631), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 1634 transitions. [2022-04-06 21:04:16,955 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 1634 transitions. Word has length 1143 [2022-04-06 21:04:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:16,955 INFO L478 AbstractCegarLoop]: Abstraction has 1516 states and 1634 transitions. [2022-04-06 21:04:16,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 1634 transitions. [2022-04-06 21:04:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1516 [2022-04-06 21:04:16,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:16,970 INFO L499 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:16,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:17,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:17,187 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash -295917545, now seen corresponding path program 31 times [2022-04-06 21:04:17,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:17,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2021277336] [2022-04-06 21:04:18,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,472 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:18,472 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:18,472 INFO L85 PathProgramCache]: Analyzing trace with hash -295917545, now seen corresponding path program 32 times [2022-04-06 21:04:18,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143172998] [2022-04-06 21:04:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:18,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 402167 backedges. 151090 proven. 18886 refuted. 0 times theorem prover too weak. 232191 trivial. 0 not checked. [2022-04-06 21:04:18,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:18,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143172998] [2022-04-06 21:04:18,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143172998] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:18,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789688441] [2022-04-06 21:04:18,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:04:18,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:18,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:18,892 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:18,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:04:19,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:04:19,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:19,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 2488 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:04:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 402167 backedges. 151090 proven. 18886 refuted. 0 times theorem prover too weak. 232191 trivial. 0 not checked. [2022-04-06 21:04:20,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 402167 backedges. 151090 proven. 18886 refuted. 0 times theorem prover too weak. 232191 trivial. 0 not checked. [2022-04-06 21:04:22,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789688441] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:22,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:22,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-04-06 21:04:22,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:22,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2021277336] [2022-04-06 21:04:22,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2021277336] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:22,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:22,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:04:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036233510] [2022-04-06 21:04:22,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:22,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:04:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:04:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:22,596 INFO L87 Difference]: Start difference. First operand 1516 states and 1634 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:22,977 INFO L93 Difference]: Finished difference Result 3391 states and 3658 transitions. [2022-04-06 21:04:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:04:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1515 [2022-04-06 21:04:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:22,984 INFO L225 Difference]: With dead ends: 3391 [2022-04-06 21:04:22,984 INFO L226 Difference]: Without dead ends: 2256 [2022-04-06 21:04:22,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3043 GetRequests, 3029 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:04:22,986 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:22,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 38 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:04:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-04-06 21:04:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1888. [2022-04-06 21:04:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1884 states have (on average 1.0780254777070064) internal successors, (2031), 1884 states have internal predecessors, (2031), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 2034 transitions. [2022-04-06 21:04:23,230 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 2034 transitions. Word has length 1515 [2022-04-06 21:04:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:23,230 INFO L478 AbstractCegarLoop]: Abstraction has 1888 states and 2034 transitions. [2022-04-06 21:04:23,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 2034 transitions. [2022-04-06 21:04:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1888 [2022-04-06 21:04:23,252 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:23,253 INFO L499 BasicCegarLoop]: trace histogram [720, 720, 120, 120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:23,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:23,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:04:23,459 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash 221392087, now seen corresponding path program 33 times [2022-04-06 21:04:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:23,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [118069492] [2022-04-06 21:04:24,594 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:25,013 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:25,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash 221392087, now seen corresponding path program 34 times [2022-04-06 21:04:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:25,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050421185] [2022-04-06 21:04:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:25,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 628581 backedges. 236065 proven. 31475 refuted. 0 times theorem prover too weak. 361041 trivial. 0 not checked. [2022-04-06 21:04:25,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050421185] [2022-04-06 21:04:25,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050421185] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:25,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751101152] [2022-04-06 21:04:25,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:04:25,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:25,627 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:25,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:04:26,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:04:26,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:26,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:04:26,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 628581 backedges. 236065 proven. 31475 refuted. 0 times theorem prover too weak. 361041 trivial. 0 not checked. [2022-04-06 21:04:27,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:04:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 628581 backedges. 236065 proven. 31475 refuted. 0 times theorem prover too weak. 361041 trivial. 0 not checked. [2022-04-06 21:04:30,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751101152] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:04:30,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:04:30,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 10 [2022-04-06 21:04:30,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:30,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [118069492] [2022-04-06 21:04:30,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [118069492] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:30,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:30,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:04:30,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965679553] [2022-04-06 21:04:30,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:30,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:04:30,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:04:30,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:04:30,252 INFO L87 Difference]: Start difference. First operand 1888 states and 2034 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:30,627 INFO L93 Difference]: Finished difference Result 3674 states and 3962 transitions. [2022-04-06 21:04:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:04:30,627 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1887 [2022-04-06 21:04:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:30,632 INFO L225 Difference]: With dead ends: 3674 [2022-04-06 21:04:30,633 INFO L226 Difference]: Without dead ends: 2260 [2022-04-06 21:04:30,635 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 3789 GetRequests, 3774 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:04:30,635 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 95 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:30,635 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 33 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:30,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-04-06 21:04:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2022-04-06 21:04:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2256 states have (on average 1.0775709219858156) internal successors, (2431), 2256 states have internal predecessors, (2431), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2434 transitions. [2022-04-06 21:04:30,962 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2434 transitions. Word has length 1887 [2022-04-06 21:04:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:30,962 INFO L478 AbstractCegarLoop]: Abstraction has 2260 states and 2434 transitions. [2022-04-06 21:04:30,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 8 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2434 transitions. [2022-04-06 21:04:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2260 [2022-04-06 21:04:30,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:04:30,993 INFO L499 BasicCegarLoop]: trace histogram [864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:04:31,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:31,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:31,194 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:04:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:04:31,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1650812009, now seen corresponding path program 35 times [2022-04-06 21:04:31,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:31,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851415502] [2022-04-06 21:04:45,490 WARN L232 SmtUtils]: Spent 13.41s on a formula simplification. DAG size of input: 1213 DAG size of output: 901 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-04-06 21:04:45,744 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:46,282 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:04:46,282 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:04:46,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1650812009, now seen corresponding path program 36 times [2022-04-06 21:04:46,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:04:46,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767399925] [2022-04-06 21:04:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:04:46,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:04:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:47,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:04:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:04:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 905347 backedges. 453235 proven. 113309 refuted. 0 times theorem prover too weak. 338803 trivial. 0 not checked. [2022-04-06 21:04:47,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:04:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767399925] [2022-04-06 21:04:47,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767399925] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:04:47,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992732752] [2022-04-06 21:04:47,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:04:47,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:04:47,088 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:04:47,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:04:48,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 442 check-sat command(s) [2022-04-06 21:04:48,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:04:48,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 2752 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:04:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:04:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 905347 backedges. 582727 proven. 0 refuted. 0 times theorem prover too weak. 322620 trivial. 0 not checked. [2022-04-06 21:04:52,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:04:52,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992732752] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:52,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:04:52,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2022-04-06 21:04:52,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:04:52,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851415502] [2022-04-06 21:04:52,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851415502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:04:52,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:04:52,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:04:52,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489728043] [2022-04-06 21:04:52,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:04:52,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:04:52,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:04:52,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:04:52,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:04:52,410 INFO L87 Difference]: Start difference. First operand 2260 states and 2434 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:04:52,804 INFO L93 Difference]: Finished difference Result 2260 states and 2434 transitions. [2022-04-06 21:04:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:04:52,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 2259 [2022-04-06 21:04:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:04:52,806 INFO L225 Difference]: With dead ends: 2260 [2022-04-06 21:04:52,806 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:04:52,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2265 GetRequests, 2246 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:04:52,810 INFO L913 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:04:52,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:04:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:04:52,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:04:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 21:04:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:04:52,812 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2259 [2022-04-06 21:04:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:04:52,812 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:04:52,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 21:04:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:04:52,812 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:04:52,814 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:04:52,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:04:53,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:04:53,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:04:59,295 WARN L232 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 536 DAG size of output: 534 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)