/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:34:30,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:34:30,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:34:30,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 20:34:30,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:34:30,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:34:30,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:34:30,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:34:30,277 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:34:30,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:34:30,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:34:30,278 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:34:30,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:34:30,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:34:30,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:34:30,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:34:30,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:34:30,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:34:30,280 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:34:30,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:34:30,280 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:34:30,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:34:30,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:34:30,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:34:30,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:34:30,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:34:30,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:34:30,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:34:30,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:34:30,282 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:34:30,282 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:34:30,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:34:30,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:34:30,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:34:30,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:34:30,511 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:34:30,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-02-14 20:34:30,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333c49262/abadbf3ba9fd4b9d9481409f78e4ef93/FLAGaa34dac4f [2022-02-14 20:34:30,952 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:34:30,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-02-14 20:34:30,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333c49262/abadbf3ba9fd4b9d9481409f78e4ef93/FLAGaa34dac4f [2022-02-14 20:34:31,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/333c49262/abadbf3ba9fd4b9d9481409f78e4ef93 [2022-02-14 20:34:31,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:34:31,372 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:34:31,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:34:31,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:34:31,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:34:31,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52fc32be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31, skipping insertion in model container [2022-02-14 20:34:31,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:34:31,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:34:31,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-02-14 20:34:31,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:34:31,557 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:34:31,595 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-02-14 20:34:31,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:34:31,622 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:34:31,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31 WrapperNode [2022-02-14 20:34:31,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:34:31,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:34:31,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:34:31,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:34:31,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:34:31,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:34:31,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:34:31,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:34:31,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:31,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:34:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:31,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 20:34:31,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 20:34:31,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:34:31,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:34:31,713 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:34:31,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:34:31,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:34:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:34:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:34:31,713 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 20:34:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 20:34:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:34:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:34:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:34:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-14 20:34:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:34:31,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-14 20:34:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:34:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:34:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:34:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:34:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:34:31,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:34:31,775 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:34:31,777 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:34:31,978 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:34:31,982 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:34:31,983 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-14 20:34:31,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:34:31 BoogieIcfgContainer [2022-02-14 20:34:31,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:34:31,985 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:34:31,985 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:34:31,997 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:34:32,000 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:34:31" (1/1) ... [2022-02-14 20:34:32,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:34:32 BasicIcfg [2022-02-14 20:34:32,033 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:34:32,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:34:32,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:34:32,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:34:32,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:34:31" (1/4) ... [2022-02-14 20:34:32,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770c03af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:34:32, skipping insertion in model container [2022-02-14 20:34:32,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:34:31" (2/4) ... [2022-02-14 20:34:32,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770c03af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:34:32, skipping insertion in model container [2022-02-14 20:34:32,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:34:31" (3/4) ... [2022-02-14 20:34:32,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770c03af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:34:32, skipping insertion in model container [2022-02-14 20:34:32,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:34:32" (4/4) ... [2022-02-14 20:34:32,051 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.iJordan [2022-02-14 20:34:32,055 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:34:32,055 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:34:32,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:34:32,126 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 20:34:32,126 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:34:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 20:34:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 20:34:32,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:32,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:32,154 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1974064059, now seen corresponding path program 1 times [2022-02-14 20:34:32,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:32,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273395616] [2022-02-14 20:34:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:32,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:32,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:34:32,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:32,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273395616] [2022-02-14 20:34:32,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273395616] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:34:32,389 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:34:32,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 20:34:32,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615230906] [2022-02-14 20:34:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:34:32,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 20:34:32,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:32,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 20:34:32,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:34:32,426 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:32,467 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-02-14 20:34:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 20:34:32,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-14 20:34:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:32,477 INFO L225 Difference]: With dead ends: 36 [2022-02-14 20:34:32,477 INFO L226 Difference]: Without dead ends: 29 [2022-02-14 20:34:32,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 20:34:32,482 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:32,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:34:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-14 20:34:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-14 20:34:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-02-14 20:34:32,514 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-02-14 20:34:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:32,515 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-02-14 20:34:32,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-02-14 20:34:32,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-14 20:34:32,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:32,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:32,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:34:32,517 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1576298534, now seen corresponding path program 1 times [2022-02-14 20:34:32,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:32,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321037289] [2022-02-14 20:34:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:32,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:32,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:34:32,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:32,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321037289] [2022-02-14 20:34:32,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321037289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:34:32,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:34:32,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 20:34:32,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276350481] [2022-02-14 20:34:32,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:34:32,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:34:32,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:34:32,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 20:34:32,641 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:32,762 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2022-02-14 20:34:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 20:34:32,763 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-14 20:34:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:32,765 INFO L225 Difference]: With dead ends: 44 [2022-02-14 20:34:32,765 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 20:34:32,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 20:34:32,766 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:32,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:34:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 20:34:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-02-14 20:34:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-14 20:34:32,772 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-02-14 20:34:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:32,772 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-14 20:34:32,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-14 20:34:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 20:34:32,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:32,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:32,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:34:32,773 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1150961380, now seen corresponding path program 1 times [2022-02-14 20:34:32,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:32,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946394138] [2022-02-14 20:34:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:32,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:32,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:34:32,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:32,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946394138] [2022-02-14 20:34:32,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946394138] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:32,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364465599] [2022-02-14 20:34:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:32,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:32,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:32,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:34:32,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 20:34:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:32,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 20:34:32,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 20:34:33,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 20:34:33,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364465599] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:34:33,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 20:34:33,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-02-14 20:34:33,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378927956] [2022-02-14 20:34:33,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:34:33,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:34:33,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:33,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:34:33,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-14 20:34:33,112 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:33,157 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-02-14 20:34:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 20:34:33,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-14 20:34:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:33,161 INFO L225 Difference]: With dead ends: 52 [2022-02-14 20:34:33,161 INFO L226 Difference]: Without dead ends: 49 [2022-02-14 20:34:33,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:34:33,163 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:33,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:34:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-14 20:34:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-02-14 20:34:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2022-02-14 20:34:33,168 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 21 [2022-02-14 20:34:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:33,168 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2022-02-14 20:34:33,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2022-02-14 20:34:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-14 20:34:33,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:33,169 INFO L514 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, 1, 1, 1, 1] [2022-02-14 20:34:33,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 20:34:33,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:33,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 452661009, now seen corresponding path program 1 times [2022-02-14 20:34:33,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:33,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145125029] [2022-02-14 20:34:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:33,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:33,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 20:34:33,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:33,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145125029] [2022-02-14 20:34:33,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145125029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:33,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803214943] [2022-02-14 20:34:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:33,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:33,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:33,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:34:33,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 20:34:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:33,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 20:34:33,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 20:34:33,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 20:34:33,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803214943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:34:33,609 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 20:34:33,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-02-14 20:34:33,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203404720] [2022-02-14 20:34:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:34:33,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 20:34:33,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 20:34:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:34:33,610 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:33,631 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2022-02-14 20:34:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 20:34:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-14 20:34:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:33,632 INFO L225 Difference]: With dead ends: 70 [2022-02-14 20:34:33,632 INFO L226 Difference]: Without dead ends: 70 [2022-02-14 20:34:33,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:34:33,633 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:33,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:34:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-14 20:34:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-02-14 20:34:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-02-14 20:34:33,639 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2022-02-14 20:34:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:33,639 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-02-14 20:34:33,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-02-14 20:34:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 20:34:33,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:33,640 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:33,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 20:34:33,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 20:34:33,861 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash -302875202, now seen corresponding path program 1 times [2022-02-14 20:34:33,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:33,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938780588] [2022-02-14 20:34:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:33,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 20:34:33,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:33,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938780588] [2022-02-14 20:34:33,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938780588] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:33,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492553156] [2022-02-14 20:34:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:33,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:33,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 20:34:33,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 20:34:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-14 20:34:34,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:34,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-14 20:34:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 20:34:34,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:34:34,323 INFO L353 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-02-14 20:34:34,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2022-02-14 20:34:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 20:34:34,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492553156] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:34,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-14 20:34:34,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-02-14 20:34:34,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376297827] [2022-02-14 20:34:34,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:34:34,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 20:34:34,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 20:34:34,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:34:34,361 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:34,474 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-02-14 20:34:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 20:34:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-14 20:34:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:34,475 INFO L225 Difference]: With dead ends: 49 [2022-02-14 20:34:34,476 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 20:34:34,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-02-14 20:34:34,477 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:34,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 161 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 20:34:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 20:34:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-02-14 20:34:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-02-14 20:34:34,480 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 28 [2022-02-14 20:34:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:34,481 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-02-14 20:34:34,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-02-14 20:34:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 20:34:34,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:34,482 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:34,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 20:34:34,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:34,701 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:34,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1691240082, now seen corresponding path program 1 times [2022-02-14 20:34:34,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:34,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169587133] [2022-02-14 20:34:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:34,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:34,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 20:34:34,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:34,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169587133] [2022-02-14 20:34:34,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169587133] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:34,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694015123] [2022-02-14 20:34:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:34,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:34,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:34,785 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) [2022-02-14 20:34:34,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 20:34:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:34,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 20:34:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:34,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-02-14 20:34:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 20:34:34,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:34:35,122 INFO L353 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-02-14 20:34:35,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-02-14 20:34:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 20:34:35,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694015123] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:34:35,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:34:35,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2022-02-14 20:34:35,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994014300] [2022-02-14 20:34:35,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:34:35,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 20:34:35,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:35,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 20:34:35,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:34:35,169 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:35,584 INFO L93 Difference]: Finished difference Result 130 states and 176 transitions. [2022-02-14 20:34:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 20:34:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-14 20:34:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:35,585 INFO L225 Difference]: With dead ends: 130 [2022-02-14 20:34:35,585 INFO L226 Difference]: Without dead ends: 130 [2022-02-14 20:34:35,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-02-14 20:34:35,586 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 269 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:35,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 72 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:34:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-14 20:34:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-02-14 20:34:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-02-14 20:34:35,593 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 29 [2022-02-14 20:34:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:35,593 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-02-14 20:34:35,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-02-14 20:34:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-14 20:34:35,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:35,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:35,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 20:34:35,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:35,795 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:35,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 671956355, now seen corresponding path program 1 times [2022-02-14 20:34:35,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:35,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747802515] [2022-02-14 20:34:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:35,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-14 20:34:35,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:35,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747802515] [2022-02-14 20:34:35,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747802515] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:35,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614998796] [2022-02-14 20:34:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:35,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:35,873 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) [2022-02-14 20:34:35,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 20:34:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:35,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 20:34:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 20:34:35,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:34:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-14 20:34:36,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614998796] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:34:36,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:34:36,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2022-02-14 20:34:36,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927538012] [2022-02-14 20:34:36,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:34:36,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 20:34:36,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 20:34:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:34:36,067 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:36,668 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2022-02-14 20:34:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-14 20:34:36,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-14 20:34:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:36,670 INFO L225 Difference]: With dead ends: 281 [2022-02-14 20:34:36,670 INFO L226 Difference]: Without dead ends: 281 [2022-02-14 20:34:36,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2022-02-14 20:34:36,671 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 457 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:36,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 67 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 20:34:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-14 20:34:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 78. [2022-02-14 20:34:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-02-14 20:34:36,677 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 32 [2022-02-14 20:34:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:36,677 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-02-14 20:34:36,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-02-14 20:34:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-14 20:34:36,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:36,678 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:36,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 20:34:36,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:36,900 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1036352920, now seen corresponding path program 2 times [2022-02-14 20:34:36,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:36,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434510030] [2022-02-14 20:34:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:36,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-14 20:34:36,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:36,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434510030] [2022-02-14 20:34:36,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434510030] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:36,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347326714] [2022-02-14 20:34:36,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:34:36,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:36,996 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) [2022-02-14 20:34:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 20:34:37,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:34:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:34:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2022-02-14 20:34:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:37,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-14 20:34:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-14 20:34:37,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:34:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-02-14 20:34:37,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347326714] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:34:37,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:34:37,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11] total 22 [2022-02-14 20:34:37,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375585288] [2022-02-14 20:34:37,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:34:37,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-14 20:34:37,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-14 20:34:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-02-14 20:34:37,864 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:39,915 INFO L93 Difference]: Finished difference Result 1052 states and 1405 transitions. [2022-02-14 20:34:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-14 20:34:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-14 20:34:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:39,919 INFO L225 Difference]: With dead ends: 1052 [2022-02-14 20:34:39,920 INFO L226 Difference]: Without dead ends: 1052 [2022-02-14 20:34:39,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=779, Invalid=3253, Unknown=0, NotChecked=0, Total=4032 [2022-02-14 20:34:39,921 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1126 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:39,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1126 Valid, 119 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-14 20:34:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-02-14 20:34:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 134. [2022-02-14 20:34:39,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.302325581395349) internal successors, (168), 129 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 172 transitions. [2022-02-14 20:34:39,946 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 172 transitions. Word has length 43 [2022-02-14 20:34:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:39,947 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 172 transitions. [2022-02-14 20:34:39,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 172 transitions. [2022-02-14 20:34:39,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-14 20:34:39,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:39,948 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:39,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 20:34:40,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:40,175 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1669091715, now seen corresponding path program 3 times [2022-02-14 20:34:40,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:40,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709729781] [2022-02-14 20:34:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:40,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:40,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-02-14 20:34:40,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:40,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709729781] [2022-02-14 20:34:40,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709729781] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:40,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798018884] [2022-02-14 20:34:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:34:40,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:40,341 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) [2022-02-14 20:34:40,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 20:34:40,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-14 20:34:40,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:34:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 20:34:40,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:40,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-14 20:34:40,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 20:34:40,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-02-14 20:34:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-02-14 20:34:40,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:34:40,982 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-02-14 20:34:40,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-02-14 20:34:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-02-14 20:34:41,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798018884] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:41,013 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-14 20:34:41,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 10] total 24 [2022-02-14 20:34:41,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280760625] [2022-02-14 20:34:41,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:34:41,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 20:34:41,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:41,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 20:34:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-14 20:34:41,017 INFO L87 Difference]: Start difference. First operand 134 states and 172 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:41,119 INFO L93 Difference]: Finished difference Result 143 states and 181 transitions. [2022-02-14 20:34:41,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 20:34:41,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-14 20:34:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:41,121 INFO L225 Difference]: With dead ends: 143 [2022-02-14 20:34:41,121 INFO L226 Difference]: Without dead ends: 137 [2022-02-14 20:34:41,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-14 20:34:41,122 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:41,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:34:41,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-14 20:34:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2022-02-14 20:34:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.28125) internal successors, (123), 96 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-02-14 20:34:41,126 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 51 [2022-02-14 20:34:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:41,126 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-02-14 20:34:41,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:41,126 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-02-14 20:34:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-14 20:34:41,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:41,127 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:41,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 20:34:41,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:41,328 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash 860965540, now seen corresponding path program 1 times [2022-02-14 20:34:41,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:41,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979426998] [2022-02-14 20:34:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:41,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:41,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-02-14 20:34:41,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:41,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979426998] [2022-02-14 20:34:41,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979426998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:41,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944599515] [2022-02-14 20:34:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:41,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:41,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:41,448 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) [2022-02-14 20:34:41,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 20:34:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 20:34:41,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 20:34:41,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:34:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 20:34:41,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944599515] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:34:41,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:34:41,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-02-14 20:34:41,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615943580] [2022-02-14 20:34:41,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:34:41,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 20:34:41,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 20:34:41,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-02-14 20:34:41,820 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:45,282 INFO L93 Difference]: Finished difference Result 828 states and 1101 transitions. [2022-02-14 20:34:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-14 20:34:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-14 20:34:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:45,286 INFO L225 Difference]: With dead ends: 828 [2022-02-14 20:34:45,286 INFO L226 Difference]: Without dead ends: 828 [2022-02-14 20:34:45,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1335, Invalid=5471, Unknown=0, NotChecked=0, Total=6806 [2022-02-14 20:34:45,292 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 1798 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:45,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1798 Valid, 164 Invalid, 2485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 1885 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-14 20:34:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-02-14 20:34:45,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 211. [2022-02-14 20:34:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.3058252427184467) internal successors, (269), 206 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 273 transitions. [2022-02-14 20:34:45,309 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 273 transitions. Word has length 54 [2022-02-14 20:34:45,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:45,310 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 273 transitions. [2022-02-14 20:34:45,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.611111111111111) internal successors, (83), 17 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:45,310 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 273 transitions. [2022-02-14 20:34:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-14 20:34:45,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:45,313 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:45,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-14 20:34:45,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 20:34:45,524 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:45,524 INFO L85 PathProgramCache]: Analyzing trace with hash -247948122, now seen corresponding path program 2 times [2022-02-14 20:34:45,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:45,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659589245] [2022-02-14 20:34:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:45,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:45,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-02-14 20:34:45,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:45,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659589245] [2022-02-14 20:34:45,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659589245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:45,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532932955] [2022-02-14 20:34:45,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 20:34:45,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:45,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:45,639 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) [2022-02-14 20:34:45,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 20:34:45,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 20:34:45,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:34:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 20:34:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-02-14 20:34:45,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:34:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-02-14 20:34:46,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532932955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:34:46,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:34:46,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-02-14 20:34:46,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668810024] [2022-02-14 20:34:46,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:34:46,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 20:34:46,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:34:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 20:34:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:34:46,153 INFO L87 Difference]: Start difference. First operand 211 states and 273 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:34:46,959 INFO L93 Difference]: Finished difference Result 1462 states and 1950 transitions. [2022-02-14 20:34:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 20:34:46,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-14 20:34:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:34:46,964 INFO L225 Difference]: With dead ends: 1462 [2022-02-14 20:34:46,964 INFO L226 Difference]: Without dead ends: 1462 [2022-02-14 20:34:46,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-02-14 20:34:46,965 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 696 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 20:34:46,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 116 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 20:34:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-02-14 20:34:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 221. [2022-02-14 20:34:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.2916666666666667) internal successors, (279), 216 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 283 transitions. [2022-02-14 20:34:46,985 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 283 transitions. Word has length 92 [2022-02-14 20:34:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:34:46,986 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 283 transitions. [2022-02-14 20:34:46,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:34:46,987 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 283 transitions. [2022-02-14 20:34:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-14 20:34:46,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:34:46,994 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:34:47,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 20:34:47,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:47,207 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:34:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:34:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1837140656, now seen corresponding path program 3 times [2022-02-14 20:34:47,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:34:47,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204959511] [2022-02-14 20:34:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:34:47,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:34:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:50,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:34:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:34:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-14 20:34:50,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:34:50,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204959511] [2022-02-14 20:34:50,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204959511] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:34:50,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419408647] [2022-02-14 20:34:50,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 20:34:50,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:34:50,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:34:50,481 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) [2022-02-14 20:34:50,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 20:34:51,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-14 20:34:51,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 20:34:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 75 conjunts are in the unsatisfiable core [2022-02-14 20:34:51,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:34:51,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-02-14 20:34:51,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:51,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-02-14 20:34:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 96 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-02-14 20:34:53,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:35:00,097 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_296 (Array Int Int))) (let ((.cse0 (select v_ArrVal_296 |c_main_~#string_entrada~0.offset|)) (.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_296) |c_main_~#vetor_vogais~0.base|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 7))) (not (= .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1))))))) is different from false [2022-02-14 20:35:00,222 WARN L838 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((v_ArrVal_296 (Array Int Int))) (let ((.cse0 (select v_ArrVal_296 |c_main_~#string_entrada~0.offset|)) (.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_296) |c_main_~#vetor_vogais~0.base|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 7))) (not (= .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 1)))))))) is different from false [2022-02-14 20:35:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 65 proven. 74 refuted. 0 times theorem prover too weak. 193 trivial. 10 not checked. [2022-02-14 20:35:00,241 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419408647] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:35:00,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:35:00,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15, 23] total 66 [2022-02-14 20:35:00,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560115729] [2022-02-14 20:35:00,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:35:00,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-14 20:35:00,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:35:00,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-14 20:35:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=3573, Unknown=2, NotChecked=250, Total=4290 [2022-02-14 20:35:00,245 INFO L87 Difference]: Start difference. First operand 221 states and 283 transitions. Second operand has 66 states, 66 states have (on average 2.5757575757575757) internal successors, (170), 65 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:35:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:35:02,789 INFO L93 Difference]: Finished difference Result 267 states and 342 transitions. [2022-02-14 20:35:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-14 20:35:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5757575757575757) internal successors, (170), 65 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-14 20:35:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:35:02,791 INFO L225 Difference]: With dead ends: 267 [2022-02-14 20:35:02,791 INFO L226 Difference]: Without dead ends: 267 [2022-02-14 20:35:02,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1069, Invalid=7867, Unknown=2, NotChecked=374, Total=9312 [2022-02-14 20:35:02,794 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 299 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 426 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 20:35:02,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 124 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 896 Invalid, 0 Unknown, 426 Unchecked, 0.6s Time] [2022-02-14 20:35:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-02-14 20:35:02,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2022-02-14 20:35:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.2923076923076924) internal successors, (336), 260 states have internal predecessors, (336), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:35:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 340 transitions. [2022-02-14 20:35:02,800 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 340 transitions. Word has length 102 [2022-02-14 20:35:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:35:02,800 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 340 transitions. [2022-02-14 20:35:02,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5757575757575757) internal successors, (170), 65 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:35:02,801 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 340 transitions. [2022-02-14 20:35:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-14 20:35:02,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:35:02,802 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:35:02,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 20:35:03,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-14 20:35:03,002 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:35:03,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:35:03,003 INFO L85 PathProgramCache]: Analyzing trace with hash 653793359, now seen corresponding path program 1 times [2022-02-14 20:35:03,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:35:03,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498095372] [2022-02-14 20:35:03,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:35:03,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:35:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:35:03,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:35:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:35:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 20:35:03,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:35:03,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498095372] [2022-02-14 20:35:03,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498095372] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:35:03,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361144176] [2022-02-14 20:35:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:35:03,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:35:03,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:35:03,824 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) [2022-02-14 20:35:03,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 20:35:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:35:04,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-14 20:35:04,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:35:04,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-02-14 20:35:04,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:04,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-02-14 20:35:05,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-02-14 20:35:05,106 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 62 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-02-14 20:35:05,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:35:16,193 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_363 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_363) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_363 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) is different from false [2022-02-14 20:35:16,306 WARN L838 $PredicateComparison]: unable to prove that (or (not (< (mod c_main_~i~0 4294967296) 10)) (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_363 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_363) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_363 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0))))) is different from false [2022-02-14 20:35:16,319 WARN L838 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_363 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_363) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_363 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0))))) is different from false [2022-02-14 20:35:16,886 WARN L838 $PredicateComparison]: unable to prove that (or (not (< (mod (+ c_main_~i~0 1) 4294967296) 10)) (forall ((|main_~#string_entrada~0.offset| Int) (v_ArrVal_363 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_main_~#string_entrada~0.base| v_ArrVal_363) |c_main_~#vetor_vogais~0.base|)) (.cse0 (select v_ArrVal_363 |main_~#string_entrada~0.offset|))) (or (< .cse0 (select .cse1 (+ |c_main_~#vetor_vogais~0.offset| 2))) (< (select .cse1 |c_main_~#vetor_vogais~0.offset|) .cse0)))) (not (< (mod (+ c_main_~i~0 2) 4294967296) 10))) is different from false [2022-02-14 20:35:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 72 proven. 9 refuted. 0 times theorem prover too weak. 217 trivial. 44 not checked. [2022-02-14 20:35:16,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361144176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 20:35:16,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 20:35:16,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 19] total 43 [2022-02-14 20:35:16,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166739205] [2022-02-14 20:35:16,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 20:35:16,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-14 20:35:16,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:35:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-14 20:35:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1267, Unknown=13, NotChecked=308, Total=1806 [2022-02-14 20:35:16,919 INFO L87 Difference]: Start difference. First operand 265 states and 340 transitions. Second operand has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 42 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:35:39,030 WARN L228 SmtUtils]: Spent 15.61s on a formula simplification that was a NOOP. DAG size: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 20:35:39,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:35:39,558 INFO L93 Difference]: Finished difference Result 489 states and 626 transitions. [2022-02-14 20:35:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-14 20:35:39,559 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 42 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-14 20:35:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:35:39,561 INFO L225 Difference]: With dead ends: 489 [2022-02-14 20:35:39,561 INFO L226 Difference]: Without dead ends: 489 [2022-02-14 20:35:39,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=882, Invalid=6258, Unknown=16, NotChecked=676, Total=7832 [2022-02-14 20:35:39,564 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 418 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1039 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 20:35:39,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 163 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1173 Invalid, 0 Unknown, 1039 Unchecked, 0.8s Time] [2022-02-14 20:35:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-02-14 20:35:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 395. [2022-02-14 20:35:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 390 states have (on average 1.2871794871794873) internal successors, (502), 390 states have internal predecessors, (502), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:35:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 506 transitions. [2022-02-14 20:35:39,571 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 506 transitions. Word has length 102 [2022-02-14 20:35:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:35:39,572 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 506 transitions. [2022-02-14 20:35:39,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.697674418604651) internal successors, (116), 42 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:35:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 506 transitions. [2022-02-14 20:35:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-14 20:35:39,573 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:35:39,573 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:35:39,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 20:35:39,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 20:35:39,787 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:35:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:35:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1697986001, now seen corresponding path program 1 times [2022-02-14 20:35:39,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:35:39,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614007067] [2022-02-14 20:35:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:35:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:35:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:35:40,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:35:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:35:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-02-14 20:35:40,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:35:40,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614007067] [2022-02-14 20:35:40,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614007067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 20:35:40,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119138017] [2022-02-14 20:35:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:35:40,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 20:35:40,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:35:40,644 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) [2022-02-14 20:35:40,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 20:35:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:35:40,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-14 20:35:40,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 20:35:49,490 INFO L353 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2022-02-14 20:35:49,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2022-02-14 20:35:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-02-14 20:35:53,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 20:35:56,389 INFO L353 Elim1Store]: treesize reduction 147, result has 69.6 percent of original size [2022-02-14 20:35:56,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 226 treesize of output 437 [2022-02-14 20:35:57,694 WARN L325 FreeRefinementEngine]: Global settings require throwing the following exception [2022-02-14 20:35:57,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-14 20:35:57,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 20:35:57,895 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:202) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:589) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:577) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:490) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:422) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:311) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:327) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:234) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:201) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:185) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:904) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:496) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:635) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-02-14 20:35:57,899 INFO L158 Benchmark]: Toolchain (without parser) took 86527.95ms. Allocated memory was 188.7MB in the beginning and 293.6MB in the end (delta: 104.9MB). Free memory was 132.4MB in the beginning and 180.0MB in the end (delta: -47.6MB). Peak memory consumption was 150.2MB. Max. memory is 8.0GB. [2022-02-14 20:35:57,899 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory is still 149.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 20:35:57,899 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.75ms. Allocated memory was 188.7MB in the beginning and 244.3MB in the end (delta: 55.6MB). Free memory was 132.2MB in the beginning and 216.6MB in the end (delta: -84.4MB). Peak memory consumption was 17.3MB. Max. memory is 8.0GB. [2022-02-14 20:35:57,899 INFO L158 Benchmark]: Boogie Preprocessor took 35.51ms. Allocated memory is still 244.3MB. Free memory was 216.6MB in the beginning and 215.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 20:35:57,899 INFO L158 Benchmark]: RCFGBuilder took 324.77ms. Allocated memory is still 244.3MB. Free memory was 215.0MB in the beginning and 201.6MB in the end (delta: 13.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-14 20:35:57,900 INFO L158 Benchmark]: IcfgTransformer took 48.78ms. Allocated memory is still 244.3MB. Free memory was 201.6MB in the beginning and 200.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 20:35:57,900 INFO L158 Benchmark]: TraceAbstraction took 85863.17ms. Allocated memory was 244.3MB in the beginning and 293.6MB in the end (delta: 49.3MB). Free memory was 199.9MB in the beginning and 180.0MB in the end (delta: 19.9MB). Peak memory consumption was 160.8MB. Max. memory is 8.0GB. [2022-02-14 20:35:57,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory is still 149.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 249.75ms. Allocated memory was 188.7MB in the beginning and 244.3MB in the end (delta: 55.6MB). Free memory was 132.2MB in the beginning and 216.6MB in the end (delta: -84.4MB). Peak memory consumption was 17.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.51ms. Allocated memory is still 244.3MB. Free memory was 216.6MB in the beginning and 215.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 324.77ms. Allocated memory is still 244.3MB. Free memory was 215.0MB in the beginning and 201.6MB in the end (delta: 13.4MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * IcfgTransformer took 48.78ms. Allocated memory is still 244.3MB. Free memory was 201.6MB in the beginning and 200.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 85863.17ms. Allocated memory was 244.3MB in the beginning and 293.6MB in the end (delta: 49.3MB). Free memory was 199.9MB in the beginning and 180.0MB in the end (delta: 19.9MB). Peak memory consumption was 160.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_mod_aux_mod_main_~i~0_26_37 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:202) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-02-14 20:35:58,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...