/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/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:18:47,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:18:47,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:18:47,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 03:18:47,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 03:18:47,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 03:18:47,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 03:18:47,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 03:18:47,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 03:18:47,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 03:18:47,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 03:18:47,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 03:18:47,147 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 03:18:47,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 03:18:47,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 03:18:47,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 03:18:47,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 03:18:47,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 03:18:47,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:18:47,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:18:47,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:18:47,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:18:47,174 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:18:47,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:18:47,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:18:47,176 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:18:47,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:18:47,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:18:47,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:18:47,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:18:47,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:18:47,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:18:47,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:18:47,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:18:47,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:18:47,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:18:47,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:18:47,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:18:47,178 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:18:47,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:18:47,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:18:47,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:18:47,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:18:47,180 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:18:47,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:18:47,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:18:47,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:18:47,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:18:47,418 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:18:47,419 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:18:47,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-03-20 03:18:47,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b22ee165/84e3aca04e20414c89d807b0e2c84dfd/FLAG5d11e70a9 [2022-03-20 03:18:47,825 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:18:47,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-03-20 03:18:47,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b22ee165/84e3aca04e20414c89d807b0e2c84dfd/FLAG5d11e70a9 [2022-03-20 03:18:48,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b22ee165/84e3aca04e20414c89d807b0e2c84dfd [2022-03-20 03:18:48,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:18:48,260 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:18:48,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:18:48,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:18:48,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:18:48,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca5353f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48, skipping insertion in model container [2022-03-20 03:18:48,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:18:48,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:18:48,410 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/insertion_sort-2.c[328,341] [2022-03-20 03:18:48,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:18:48,428 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:18:48,435 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/insertion_sort-2.c[328,341] [2022-03-20 03:18:48,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:18:48,449 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:18:48,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48 WrapperNode [2022-03-20 03:18:48,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:18:48,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:18:48,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:18:48,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:18:48,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:18:48,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:18:48,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:18:48,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:18:48,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:18:48,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:48,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 03:18:48,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 03:18:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:18:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:18:48,530 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:18:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:18:48,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:18:48,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:18:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:18:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:18:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:18:48,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:18:48,631 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:18:48,632 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:18:48,834 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:18:48,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:18:48,839 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-20 03:18:48,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:48 BoogieIcfgContainer [2022-03-20 03:18:48,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:18:48,841 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:18:48,841 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:18:48,846 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:18:48,849 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:48" (1/1) ... [2022-03-20 03:18:48,851 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:18:48,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:18:48 BasicIcfg [2022-03-20 03:18:48,874 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:18:48,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:18:48,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:18:48,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:18:48,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:18:48" (1/4) ... [2022-03-20 03:18:48,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccc945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:18:48, skipping insertion in model container [2022-03-20 03:18:48,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:48" (2/4) ... [2022-03-20 03:18:48,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccc945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:18:48, skipping insertion in model container [2022-03-20 03:18:48,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:48" (3/4) ... [2022-03-20 03:18:48,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ccc945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:18:48, skipping insertion in model container [2022-03-20 03:18:48,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:18:48" (4/4) ... [2022-03-20 03:18:48,884 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.cJordan [2022-03-20 03:18:48,889 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:18:48,889 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:18:48,933 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:18:48,940 INFO L340 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 [2022-03-20 03:18:48,940 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:18:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:18:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 03:18:48,967 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:48,968 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:48,968 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash -189909079, now seen corresponding path program 1 times [2022-03-20 03:18:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:48,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947858546] [2022-03-20 03:18:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:48,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:49,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:49,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947858546] [2022-03-20 03:18:49,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947858546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:49,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:49,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:18:49,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000097438] [2022-03-20 03:18:49,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:49,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:18:49,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:49,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:18:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:18:49,182 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:49,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:49,216 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-20 03:18:49,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:18:49,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-03-20 03:18:49,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:49,223 INFO L225 Difference]: With dead ends: 31 [2022-03-20 03:18:49,223 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 03:18:49,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:18:49,228 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:49,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:18:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 03:18:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-03-20 03:18:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-03-20 03:18:49,254 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-03-20 03:18:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:49,255 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-03-20 03:18:49,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-03-20 03:18:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 03:18:49,256 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:49,256 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:49,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:18:49,256 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:49,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1109859861, now seen corresponding path program 1 times [2022-03-20 03:18:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:49,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527143237] [2022-03-20 03:18:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:49,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:49,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527143237] [2022-03-20 03:18:49,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527143237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:49,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:49,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:18:49,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44393230] [2022-03-20 03:18:49,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:49,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:18:49,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:49,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:18:49,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:18:49,409 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:49,556 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-20 03:18:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:18:49,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-03-20 03:18:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:49,559 INFO L225 Difference]: With dead ends: 32 [2022-03-20 03:18:49,559 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 03:18:49,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-20 03:18:49,564 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:49,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:18:49,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 03:18:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-20 03:18:49,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-20 03:18:49,575 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-03-20 03:18:49,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:49,575 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-20 03:18:49,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-20 03:18:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:18:49,576 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:49,576 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:49,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:18:49,576 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1012960919, now seen corresponding path program 1 times [2022-03-20 03:18:49,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993075172] [2022-03-20 03:18:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:49,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:49,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993075172] [2022-03-20 03:18:49,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993075172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613298147] [2022-03-20 03:18:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:49,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:49,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:49,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:18:49,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:18:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 03:18:49,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:18:49,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:18:49,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613298147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:49,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:18:49,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 03:18:49,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82341279] [2022-03-20 03:18:49,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:49,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 03:18:49,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 03:18:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 03:18:49,993 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:50,042 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-20 03:18:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 03:18:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2022-03-20 03:18:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:50,044 INFO L225 Difference]: With dead ends: 35 [2022-03-20 03:18:50,044 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 03:18:50,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-20 03:18:50,048 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:50,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 93 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:18:50,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 03:18:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-03-20 03:18:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-03-20 03:18:50,058 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2022-03-20 03:18:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:50,058 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-03-20 03:18:50,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-03-20 03:18:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 03:18:50,059 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:50,060 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:50,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:50,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:50,278 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:50,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:50,278 INFO L85 PathProgramCache]: Analyzing trace with hash -768849603, now seen corresponding path program 1 times [2022-03-20 03:18:50,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:50,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630838545] [2022-03-20 03:18:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:50,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:50,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:18:50,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:50,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630838545] [2022-03-20 03:18:50,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630838545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:50,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:50,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:18:50,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843669090] [2022-03-20 03:18:50,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:50,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:18:50,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:50,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:18:50,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:18:50,356 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:50,424 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-03-20 03:18:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 03:18:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 23 [2022-03-20 03:18:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:50,425 INFO L225 Difference]: With dead ends: 38 [2022-03-20 03:18:50,425 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 03:18:50,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-03-20 03:18:50,426 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:50,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:18:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 03:18:50,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-03-20 03:18:50,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-20 03:18:50,429 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-03-20 03:18:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:50,429 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-20 03:18:50,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-20 03:18:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 03:18:50,429 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:50,430 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:50,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 03:18:50,430 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1028101756, now seen corresponding path program 1 times [2022-03-20 03:18:50,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:50,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264862343] [2022-03-20 03:18:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:50,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:50,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:50,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264862343] [2022-03-20 03:18:50,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264862343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:50,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079186266] [2022-03-20 03:18:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:50,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:50,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:18:50,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:18:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 03:18:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:50,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:53,149 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_div_aux_mod_main_~SIZE~0_29_56 Int) (aux_mod_aux_mod_main_~SIZE~0_29_56 Int)) (or (<= 0 aux_div_aux_mod_main_~SIZE~0_29_56) (<= (+ 4294967295 (* aux_div_aux_mod_main_~SIZE~0_29_56 4294967296) aux_mod_aux_mod_main_~SIZE~0_29_56) 0) (<= 4294967296 aux_mod_aux_mod_main_~SIZE~0_29_56) (< (mod c_main_~j~0 4294967296) (mod (+ (* 4294967295 aux_mod_aux_mod_main_~SIZE~0_29_56) 1) 4294967296)))) is different from false [2022-03-20 03:18:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-03-20 03:18:54,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079186266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:54,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:54,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-03-20 03:18:54,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839859070] [2022-03-20 03:18:54,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:54,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 03:18:54,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 03:18:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2022-03-20 03:18:54,162 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:54,482 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-03-20 03:18:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:18:54,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 03:18:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:54,483 INFO L225 Difference]: With dead ends: 40 [2022-03-20 03:18:54,484 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 03:18:54,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=68, Invalid=207, Unknown=1, NotChecked=30, Total=306 [2022-03-20 03:18:54,484 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:54,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 54 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 126 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-03-20 03:18:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 03:18:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-03-20 03:18:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:18:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-20 03:18:54,487 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-03-20 03:18:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:54,488 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-20 03:18:54,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:54,488 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-20 03:18:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 03:18:54,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:54,488 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:54,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:54,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:54,692 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:54,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1354614778, now seen corresponding path program 2 times [2022-03-20 03:18:54,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:54,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874812812] [2022-03-20 03:18:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:54,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:55,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:55,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874812812] [2022-03-20 03:18:55,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874812812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:55,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679645387] [2022-03-20 03:18:55,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:18:55,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:55,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:18:55,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:18:55,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:18:55,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:18:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 03:18:55,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 03:18:55,358 INFO L390 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 28 treesize of output 27 [2022-03-20 03:18:55,412 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:18:55,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 03:18:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:18:55,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:55,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-20 03:18:55,628 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-20 03:18:55,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 93 treesize of output 90 [2022-03-20 03:18:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:18:55,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679645387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:55,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:55,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 30 [2022-03-20 03:18:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301953369] [2022-03-20 03:18:55,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:55,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 03:18:55,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:55,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 03:18:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-03-20 03:18:55,726 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:56,604 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2022-03-20 03:18:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 03:18:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 03:18:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:56,607 INFO L225 Difference]: With dead ends: 77 [2022-03-20 03:18:56,607 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 03:18:56,608 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=525, Invalid=2445, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 03:18:56,608 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:56,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 91 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 606 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-03-20 03:18:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 03:18:56,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2022-03-20 03:18:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:18:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-03-20 03:18:56,614 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2022-03-20 03:18:56,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:56,615 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-03-20 03:18:56,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 27 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:18:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-03-20 03:18:56,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 03:18:56,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:56,615 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 03:18:56,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:56,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:56,831 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1272155915, now seen corresponding path program 1 times [2022-03-20 03:18:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:56,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412057119] [2022-03-20 03:18:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:57,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:57,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412057119] [2022-03-20 03:18:57,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412057119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:57,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158086491] [2022-03-20 03:18:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:57,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:57,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:18:57,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 03:18:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:57,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 03:18:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:57,351 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-20 03:18:57,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2022-03-20 03:18:57,527 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-03-20 03:18:57,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2022-03-20 03:18:57,696 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-03-20 03:18:57,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-03-20 03:18:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:18:57,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:58,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2022-03-20 03:18:58,072 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-20 03:18:58,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 717 treesize of output 657 [2022-03-20 03:18:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:18:59,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158086491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:59,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:59,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 36 [2022-03-20 03:18:59,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325657050] [2022-03-20 03:18:59,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:59,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 03:18:59,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:59,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 03:18:59,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1124, Unknown=1, NotChecked=0, Total=1260 [2022-03-20 03:18:59,119 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:19,106 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 4)) (.cse2 (+ |c_main_~#v~0.offset| 4)) (.cse4 (not |c_main_#t~short10|))) (and (= |c_#NULL.base| |c_old(#NULL.base)|) (or (<= (+ c_main_~i~0 1) 0) (= .cse0 0)) (let ((.cse1 (select |c_#memory_int| |c_main_~#v~0.base|))) (<= (select .cse1 |c_main_~#v~0.offset|) (select .cse1 .cse2))) (let ((.cse3 (<= 0 c_main_~i~0))) (or (and (not .cse3) .cse4) (and |c_main_#t~short10| .cse3))) (<= c_main_~i~0 0) (or (= (+ .cse0 |c_main_~#v~0.offset| 4) .cse2) .cse4) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (forall ((v_ArrVal_72 Int)) (or (not (<= v_ArrVal_72 c_main_~key~0)) (let ((.cse5 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* c_main_~i~0 4) |c_main_~#v~0.offset| 4) v_ArrVal_72))) (<= (select .cse5 |c_main_~#v~0.offset|) (select .cse5 (+ |c_main_~#v~0.offset| 4)))))))) is different from false [2022-03-20 03:19:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:33,295 INFO L93 Difference]: Finished difference Result 153 states and 201 transitions. [2022-03-20 03:19:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 03:19:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 03:19:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:33,298 INFO L225 Difference]: With dead ends: 153 [2022-03-20 03:19:33,298 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 03:19:33,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=750, Invalid=5888, Unknown=8, NotChecked=160, Total=6806 [2022-03-20 03:19:33,300 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 149 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:33,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 148 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 903 Invalid, 0 Unknown, 849 Unchecked, 0.5s Time] [2022-03-20 03:19:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 03:19:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 72. [2022-03-20 03:19:33,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.375) internal successors, (88), 65 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2022-03-20 03:19:33,308 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 28 [2022-03-20 03:19:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:33,309 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2022-03-20 03:19:33,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2022-03-20 03:19:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 03:19:33,313 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:33,313 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:33,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 03:19:33,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:33,514 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:33,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:33,514 INFO L85 PathProgramCache]: Analyzing trace with hash -551964914, now seen corresponding path program 1 times [2022-03-20 03:19:33,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:33,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564996895] [2022-03-20 03:19:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:33,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:19:33,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:33,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564996895] [2022-03-20 03:19:33,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564996895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:33,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876647207] [2022-03-20 03:19:33,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:33,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:33,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:33,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:19:33,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 03:19:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:33,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 03:19:33,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:19:33,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 03:19:33,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876647207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:19:33,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:19:33,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-03-20 03:19:33,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961044628] [2022-03-20 03:19:33,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:19:33,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 03:19:33,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:33,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 03:19:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 03:19:33,742 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:33,956 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-03-20 03:19:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 03:19:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 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 31 [2022-03-20 03:19:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:33,958 INFO L225 Difference]: With dead ends: 104 [2022-03-20 03:19:33,958 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 03:19:33,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-03-20 03:19:33,958 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 110 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:33,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 43 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:19:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 03:19:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 60. [2022-03-20 03:19:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2022-03-20 03:19:33,962 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 31 [2022-03-20 03:19:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:33,963 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2022-03-20 03:19:33,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2022-03-20 03:19:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 03:19:33,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:33,963 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:33,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 03:19:34,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:34,180 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1244986445, now seen corresponding path program 3 times [2022-03-20 03:19:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:34,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410228423] [2022-03-20 03:19:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:34,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:19:34,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:34,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410228423] [2022-03-20 03:19:34,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410228423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:34,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402900072] [2022-03-20 03:19:34,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:19:34,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:34,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:34,277 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:19:34,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 03:19:34,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 03:19:34,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:19:34,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 03:19:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:19:34,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:19:34,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402900072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:19:34,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:19:34,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-20 03:19:34,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510065449] [2022-03-20 03:19:34,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:19:34,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 03:19:34,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 03:19:34,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-20 03:19:34,560 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:34,802 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2022-03-20 03:19:34,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:19:34,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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 31 [2022-03-20 03:19:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:34,803 INFO L225 Difference]: With dead ends: 126 [2022-03-20 03:19:34,803 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 03:19:34,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:19:34,804 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 155 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:34,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 70 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:19:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 03:19:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2022-03-20 03:19:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 78 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2022-03-20 03:19:34,808 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 31 [2022-03-20 03:19:34,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:34,808 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2022-03-20 03:19:34,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2022-03-20 03:19:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 03:19:34,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:34,809 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:34,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 03:19:35,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:35,020 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1093737958, now seen corresponding path program 2 times [2022-03-20 03:19:35,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:35,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656081143] [2022-03-20 03:19:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:35,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:35,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-20 03:19:35,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:35,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656081143] [2022-03-20 03:19:35,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656081143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:19:35,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:19:35,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:19:35,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361785478] [2022-03-20 03:19:35,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:19:35,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:19:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:19:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:19:35,055 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:35,088 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-03-20 03:19:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 03:19:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 31 [2022-03-20 03:19:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:35,089 INFO L225 Difference]: With dead ends: 72 [2022-03-20 03:19:35,089 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 03:19:35,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:19:35,090 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:35,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:19:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 03:19:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-03-20 03:19:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 57 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-20 03:19:35,103 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 31 [2022-03-20 03:19:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:35,103 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-20 03:19:35,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-20 03:19:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 03:19:35,106 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:35,106 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 03:19:35,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 03:19:35,106 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:35,107 INFO L85 PathProgramCache]: Analyzing trace with hash 567979469, now seen corresponding path program 1 times [2022-03-20 03:19:35,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:35,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819037179] [2022-03-20 03:19:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:35,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:35,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:35,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-20 03:19:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:19:35,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:35,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819037179] [2022-03-20 03:19:35,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819037179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:35,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26599491] [2022-03-20 03:19:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:35,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:35,258 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:19:35,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 03:19:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 03:19:35,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:19:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:19:35,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26599491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:19:35,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:19:35,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 03:19:35,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045664559] [2022-03-20 03:19:35,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:19:35,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 03:19:35,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 03:19:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 03:19:35,544 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:35,815 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2022-03-20 03:19:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:19:35,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-20 03:19:35,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:35,816 INFO L225 Difference]: With dead ends: 88 [2022-03-20 03:19:35,816 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 03:19:35,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-03-20 03:19:35,817 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 161 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:35,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 64 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:19:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 03:19:35,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-03-20 03:19:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-03-20 03:19:35,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 33 [2022-03-20 03:19:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:35,820 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-03-20 03:19:35,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-03-20 03:19:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 03:19:35,820 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:35,820 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:35,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 03:19:36,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:36,033 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:36,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1701261365, now seen corresponding path program 4 times [2022-03-20 03:19:36,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:36,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145943798] [2022-03-20 03:19:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:36,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:36,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:19:36,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:36,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145943798] [2022-03-20 03:19:36,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145943798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:36,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395318221] [2022-03-20 03:19:36,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:19:36,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:36,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:19:36,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 03:19:36,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:19:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:19:36,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 03:19:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:36,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 03:19:36,605 INFO L390 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 21 treesize of output 20 [2022-03-20 03:19:36,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 03:19:36,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 03:19:36,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 03:19:36,728 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:19:36,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-03-20 03:19:36,761 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:19:36,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 03:19:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 03:19:36,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:37,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-03-20 03:19:37,218 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-03-20 03:19:37,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 707 treesize of output 673 [2022-03-20 03:19:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 03:19:38,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395318221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:19:38,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:19:38,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 36 [2022-03-20 03:19:38,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562327725] [2022-03-20 03:19:38,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:19:38,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 03:19:38,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 03:19:38,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 03:19:38,293 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:39,023 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-03-20 03:19:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 03:19:39,023 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 03:19:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:39,024 INFO L225 Difference]: With dead ends: 86 [2022-03-20 03:19:39,024 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 03:19:39,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=400, Invalid=2680, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 03:19:39,025 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:39,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 107 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 548 Invalid, 0 Unknown, 242 Unchecked, 0.3s Time] [2022-03-20 03:19:39,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 03:19:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2022-03-20 03:19:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 56 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-03-20 03:19:39,027 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 33 [2022-03-20 03:19:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:39,027 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-03-20 03:19:39,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 33 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-03-20 03:19:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 03:19:39,028 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:39,028 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:39,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 03:19:39,234 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 03:19:39,234 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:39,235 INFO L85 PathProgramCache]: Analyzing trace with hash -954574653, now seen corresponding path program 1 times [2022-03-20 03:19:39,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:39,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971796650] [2022-03-20 03:19:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:39,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:39,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:19:39,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:39,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971796650] [2022-03-20 03:19:39,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971796650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:39,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720263870] [2022-03-20 03:19:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:39,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:39,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:39,459 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:19:39,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 03:19:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:39,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 03:19:39,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:39,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 03:19:39,714 INFO L390 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 28 treesize of output 27 [2022-03-20 03:19:39,762 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:19:39,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-20 03:19:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 03:19:39,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:40,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-20 03:19:40,210 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-20 03:19:40,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 93 treesize of output 90 [2022-03-20 03:19:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 03:19:40,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720263870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:19:40,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:19:40,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-03-20 03:19:40,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504887097] [2022-03-20 03:19:40,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:19:40,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 03:19:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:40,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 03:19:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-20 03:19:40,340 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:41,713 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2022-03-20 03:19:41,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 03:19:41,714 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 03:19:41,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:41,716 INFO L225 Difference]: With dead ends: 133 [2022-03-20 03:19:41,716 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 03:19:41,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 61 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=829, Invalid=4141, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 03:19:41,717 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 234 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:41,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 107 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 962 Invalid, 0 Unknown, 155 Unchecked, 0.5s Time] [2022-03-20 03:19:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 03:19:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 71. [2022-03-20 03:19:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:19:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-03-20 03:19:41,720 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 36 [2022-03-20 03:19:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:41,720 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-03-20 03:19:41,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:19:41,721 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-03-20 03:19:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 03:19:41,721 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:41,721 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:41,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 03:19:41,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 03:19:41,931 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash -392015670, now seen corresponding path program 3 times [2022-03-20 03:19:41,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:41,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693194049] [2022-03-20 03:19:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:41,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:19:42,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693194049] [2022-03-20 03:19:42,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693194049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:42,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559961301] [2022-03-20 03:19:42,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:19:42,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:42,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:42,423 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 03:19:42,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 03:19:42,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 03:19:42,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:19:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 03:19:42,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:42,593 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 03:19:42,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2022-03-20 03:19:42,754 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-03-20 03:19:42,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2022-03-20 03:19:42,917 INFO L356 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2022-03-20 03:19:42,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-03-20 03:19:43,030 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-03-20 03:19:43,031 INFO L390 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 35 treesize of output 13 [2022-03-20 03:19:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-20 03:19:43,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:45,381 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_28 Int)) (or (not (<= c_main_~j~0 (+ v_main_~i~0_28 1))) (forall ((v_ArrVal_231 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ (* v_main_~i~0_28 4) |c_main_~#v~0.offset| 4) v_ArrVal_231))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))))) is different from false [2022-03-20 03:19:53,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-03-20 03:19:53,301 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-03-20 03:19:53,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 85467 treesize of output 82393