/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/array-tiling/pr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:03:44,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:03:44,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:03:44,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 09:03:44,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:03:44,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:03:44,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:03:44,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:03:44,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:03:44,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:03:44,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:03:44,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:03:44,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:03:44,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:03:44,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:03:44,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:03:44,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:03:44,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:03:44,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:03:44,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:03:44,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:03:44,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:03:44,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:03:44,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:03:44,762 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:03:44,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:03:44,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:03:44,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:03:44,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:03:44,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:03:44,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:03:44,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:03:44,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:03:44,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:03:44,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:03:44,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:03:44,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:03:44,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:03:44,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:03:44,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:03:44,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:03:44,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:03:44,765 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:03:44,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:03:44,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:03:44,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:03:44,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:03:44,948 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:03:44,949 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:03:44,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr3.c [2022-01-31 09:03:45,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3381759/0f07b3f220fe4698aa24f2b17bbe70a5/FLAG315c51770 [2022-01-31 09:03:45,353 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:03:45,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr3.c [2022-01-31 09:03:45,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3381759/0f07b3f220fe4698aa24f2b17bbe70a5/FLAG315c51770 [2022-01-31 09:03:45,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb3381759/0f07b3f220fe4698aa24f2b17bbe70a5 [2022-01-31 09:03:45,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:03:45,800 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:03:45,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:03:45,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:03:45,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:03:45,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:45,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f50f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45, skipping insertion in model container [2022-01-31 09:03:45,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:45,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:03:45,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:03:45,907 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr3.c[394,407] [2022-01-31 09:03:45,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:03:45,939 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:03:45,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr3.c[394,407] [2022-01-31 09:03:45,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:03:45,976 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:03:45,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45 WrapperNode [2022-01-31 09:03:45,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:03:45,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:03:45,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:03:45,977 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:03:45,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:45,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:45,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:45,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:46,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:46,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:46,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:46,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:03:46,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:03:46,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:03:46,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:03:46,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (1/1) ... [2022-01-31 09:03:46,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:03:46,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:46,039 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) [2022-01-31 09:03:46,063 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 [2022-01-31 09:03:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:03:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:03:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:03:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:03:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:03:46,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:03:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:03:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:03:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:03:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:03:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:03:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:03:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:03:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:03:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:03:46,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:03:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:03:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:03:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:03:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:03:46,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:03:46,113 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:03:46,114 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:03:46,211 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:03:46,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:03:46,215 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:03:46,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:46 BoogieIcfgContainer [2022-01-31 09:03:46,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:03:46,217 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:03:46,217 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:03:46,217 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:03:46,219 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:46" (1/1) ... [2022-01-31 09:03:46,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:03:46 BasicIcfg [2022-01-31 09:03:46,231 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:03:46,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:03:46,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:03:46,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:03:46,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:03:45" (1/4) ... [2022-01-31 09:03:46,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a25bfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:03:46, skipping insertion in model container [2022-01-31 09:03:46,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:45" (2/4) ... [2022-01-31 09:03:46,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a25bfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:03:46, skipping insertion in model container [2022-01-31 09:03:46,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:46" (3/4) ... [2022-01-31 09:03:46,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a25bfde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:03:46, skipping insertion in model container [2022-01-31 09:03:46,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:03:46" (4/4) ... [2022-01-31 09:03:46,236 INFO L111 eAbstractionObserver]: Analyzing ICFG pr3.cJordan [2022-01-31 09:03:46,239 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:03:46,239 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:03:46,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:03:46,266 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:03:46,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:03:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:03:46,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:46,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:46,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:46,282 INFO L85 PathProgramCache]: Analyzing trace with hash 402359332, now seen corresponding path program 1 times [2022-01-31 09:03:46,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:46,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497413304] [2022-01-31 09:03:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:46,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:46,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:46,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:46,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:46,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497413304] [2022-01-31 09:03:46,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497413304] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:46,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:46,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:03:46,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158146758] [2022-01-31 09:03:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:46,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:03:46,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:46,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:03:46,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:03:46,460 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:46,508 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-01-31 09:03:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:03:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:03:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:46,514 INFO L225 Difference]: With dead ends: 37 [2022-01-31 09:03:46,514 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 09:03:46,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:03:46,517 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:46,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 09:03:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 09:03:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-01-31 09:03:46,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 22 [2022-01-31 09:03:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:46,537 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-01-31 09:03:46,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-01-31 09:03:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:03:46,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:46,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:46,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:03:46,538 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:46,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2020714910, now seen corresponding path program 1 times [2022-01-31 09:03:46,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:46,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219940091] [2022-01-31 09:03:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:46,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:46,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:46,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:46,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:46,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219940091] [2022-01-31 09:03:46,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219940091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:46,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:46,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:03:46,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417091073] [2022-01-31 09:03:46,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:46,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:03:46,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:46,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:03:46,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:46,682 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:46,809 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-31 09:03:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:03:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:03:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:46,811 INFO L225 Difference]: With dead ends: 37 [2022-01-31 09:03:46,811 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 09:03:46,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:03:46,817 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:46,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:03:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 09:03:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-31 09:03:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-31 09:03:46,827 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2022-01-31 09:03:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:46,827 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-31 09:03:46,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-31 09:03:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:03:46,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:46,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:46,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:03:46,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2019791389, now seen corresponding path program 1 times [2022-01-31 09:03:46,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751336157] [2022-01-31 09:03:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:46,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:46,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:47,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:47,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751336157] [2022-01-31 09:03:47,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751336157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:47,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:47,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:03:47,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895357507] [2022-01-31 09:03:47,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:47,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:03:47,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:03:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:47,020 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:47,092 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-31 09:03:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:03:47,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 09:03:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:47,095 INFO L225 Difference]: With dead ends: 41 [2022-01-31 09:03:47,095 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 09:03:47,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:03:47,098 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:47,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 35 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 09:03:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-01-31 09:03:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-01-31 09:03:47,103 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2022-01-31 09:03:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:47,103 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-01-31 09:03:47,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-01-31 09:03:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 09:03:47,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:47,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:47,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:03:47,105 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash -326277831, now seen corresponding path program 1 times [2022-01-31 09:03:47,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:47,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362438290] [2022-01-31 09:03:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:47,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:47,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:47,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:47,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:47,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362438290] [2022-01-31 09:03:47,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362438290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:47,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171094789] [2022-01-31 09:03:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:47,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:47,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:47,415 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) [2022-01-31 09:03:47,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:03:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:47,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 09:03:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:47,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:03:47,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:47,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:03:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:47,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:03:47,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 09:03:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:47,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:47,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-01-31 09:03:47,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-31 09:03:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:47,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171094789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:47,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:47,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2022-01-31 09:03:47,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968743625] [2022-01-31 09:03:47,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:47,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 09:03:47,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:47,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 09:03:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:03:47,902 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:03:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:48,444 INFO L93 Difference]: Finished difference Result 98 states and 130 transitions. [2022-01-31 09:03:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:03:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2022-01-31 09:03:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:48,447 INFO L225 Difference]: With dead ends: 98 [2022-01-31 09:03:48,447 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 09:03:48,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:03:48,448 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 105 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:48,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 167 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:03:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 09:03:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 45. [2022-01-31 09:03:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:48,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-01-31 09:03:48,455 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 27 [2022-01-31 09:03:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:48,456 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-01-31 09:03:48,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:03:48,456 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-01-31 09:03:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 09:03:48,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:48,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:48,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:48,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:48,672 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash -197195112, now seen corresponding path program 1 times [2022-01-31 09:03:48,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573280014] [2022-01-31 09:03:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:48,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:48,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:48,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573280014] [2022-01-31 09:03:48,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573280014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:48,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:48,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:03:48,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758645935] [2022-01-31 09:03:48,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:48,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:03:48,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:48,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:03:48,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:03:48,720 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:48,770 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-01-31 09:03:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:03:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-01-31 09:03:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:48,771 INFO L225 Difference]: With dead ends: 51 [2022-01-31 09:03:48,771 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 09:03:48,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:48,772 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 35 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:48,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 69 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 09:03:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-01-31 09:03:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-01-31 09:03:48,775 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 27 [2022-01-31 09:03:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:48,775 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-01-31 09:03:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-01-31 09:03:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 09:03:48,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:48,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:48,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 09:03:48,776 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:48,777 INFO L85 PathProgramCache]: Analyzing trace with hash -393708617, now seen corresponding path program 1 times [2022-01-31 09:03:48,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:48,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786510419] [2022-01-31 09:03:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:48,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:48,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786510419] [2022-01-31 09:03:48,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786510419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:48,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:48,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:03:48,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881675454] [2022-01-31 09:03:48,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:48,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:03:48,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:48,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:03:48,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:03:48,818 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:48,864 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-01-31 09:03:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:03:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-01-31 09:03:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:48,865 INFO L225 Difference]: With dead ends: 51 [2022-01-31 09:03:48,865 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 09:03:48,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:48,866 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 37 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:48,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 67 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 09:03:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-01-31 09:03:48,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:48,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-01-31 09:03:48,869 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 27 [2022-01-31 09:03:48,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:48,869 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-01-31 09:03:48,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:48,869 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-01-31 09:03:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 09:03:48,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:48,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:48,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 09:03:48,870 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:48,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2104307320, now seen corresponding path program 1 times [2022-01-31 09:03:48,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:48,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611016885] [2022-01-31 09:03:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:48,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:48,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611016885] [2022-01-31 09:03:48,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611016885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714084795] [2022-01-31 09:03:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:48,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:48,984 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) [2022-01-31 09:03:49,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:03:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:03:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:49,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:03:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:49,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:03:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:49,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:03:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:49,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:49,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-01-31 09:03:49,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-31 09:03:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:49,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714084795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:49,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:49,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 17 [2022-01-31 09:03:49,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713753857] [2022-01-31 09:03:49,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:49,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 09:03:49,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 09:03:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-31 09:03:49,293 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:03:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:49,588 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2022-01-31 09:03:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 09:03:49,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-01-31 09:03:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:49,589 INFO L225 Difference]: With dead ends: 85 [2022-01-31 09:03:49,589 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 09:03:49,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:03:49,590 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 82 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:49,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 192 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:03:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 09:03:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 54. [2022-01-31 09:03:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 45 states have internal predecessors, (56), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-01-31 09:03:49,593 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 27 [2022-01-31 09:03:49,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:49,594 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-01-31 09:03:49,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:03:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-01-31 09:03:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:03:49,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:49,594 INFO L514 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:49,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:49,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-01-31 09:03:49,811 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:49,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1103143710, now seen corresponding path program 1 times [2022-01-31 09:03:49,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:49,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637732094] [2022-01-31 09:03:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:49,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:49,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:49,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:49,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:49,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637732094] [2022-01-31 09:03:49,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637732094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:49,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:49,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:03:49,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147066043] [2022-01-31 09:03:49,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:49,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:03:49,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:03:49,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:49,862 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:49,893 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-01-31 09:03:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:03:49,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-01-31 09:03:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:49,894 INFO L225 Difference]: With dead ends: 60 [2022-01-31 09:03:49,894 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 09:03:49,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:49,895 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:49,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:49,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 09:03:49,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-01-31 09:03:49,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 45 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-01-31 09:03:49,898 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 32 [2022-01-31 09:03:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:49,898 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-01-31 09:03:49,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:49,899 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-01-31 09:03:49,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 09:03:49,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:49,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:49,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 09:03:49,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:49,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:49,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1118100900, now seen corresponding path program 1 times [2022-01-31 09:03:49,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:49,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460061583] [2022-01-31 09:03:49,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:49,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:49,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:49,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:49,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:49,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460061583] [2022-01-31 09:03:49,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460061583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:49,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:49,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:03:49,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630985835] [2022-01-31 09:03:49,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:49,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:03:49,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:03:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:49,929 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:49,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:49,964 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-01-31 09:03:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:03:49,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-01-31 09:03:49,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:49,965 INFO L225 Difference]: With dead ends: 54 [2022-01-31 09:03:49,965 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 09:03:49,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:49,966 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:49,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 65 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:49,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 09:03:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-01-31 09:03:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 39 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-01-31 09:03:49,969 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 32 [2022-01-31 09:03:49,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:49,969 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-01-31 09:03:49,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:49,969 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-01-31 09:03:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 09:03:49,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:49,970 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:49,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 09:03:49,970 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash -154804984, now seen corresponding path program 1 times [2022-01-31 09:03:49,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:49,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350506542] [2022-01-31 09:03:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:49,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:03:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:50,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350506542] [2022-01-31 09:03:50,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350506542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:50,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117641509] [2022-01-31 09:03:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:50,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:50,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:50,107 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) [2022-01-31 09:03:50,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:03:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 09:03:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:50,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:03:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:50,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:03:50,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 09:03:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:50,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:50,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:03:50,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 09:03:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:50,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117641509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:50,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:50,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2022-01-31 09:03:50,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796767294] [2022-01-31 09:03:50,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:50,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 09:03:50,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 09:03:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:03:50,464 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 09:03:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:50,933 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-01-31 09:03:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:03:50,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2022-01-31 09:03:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:50,934 INFO L225 Difference]: With dead ends: 118 [2022-01-31 09:03:50,934 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 09:03:50,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=1157, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 09:03:50,935 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 157 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:50,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 114 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:03:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 09:03:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 66. [2022-01-31 09:03:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 56 states have internal predecessors, (69), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:03:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2022-01-31 09:03:50,939 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 36 [2022-01-31 09:03:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:50,939 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2022-01-31 09:03:50,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 09:03:50,939 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2022-01-31 09:03:50,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 09:03:50,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:50,940 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:50,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:51,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:51,158 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:51,158 INFO L85 PathProgramCache]: Analyzing trace with hash -563629209, now seen corresponding path program 1 times [2022-01-31 09:03:51,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:51,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376462305] [2022-01-31 09:03:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:51,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:03:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:03:51,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376462305] [2022-01-31 09:03:51,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376462305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:51,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:51,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:03:51,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672120609] [2022-01-31 09:03:51,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:51,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:03:51,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:51,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:03:51,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:03:51,211 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:51,256 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-01-31 09:03:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:03:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-01-31 09:03:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:51,257 INFO L225 Difference]: With dead ends: 75 [2022-01-31 09:03:51,257 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 09:03:51,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:51,258 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:51,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 69 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 09:03:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2022-01-31 09:03:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:03:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-01-31 09:03:51,261 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 36 [2022-01-31 09:03:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:51,261 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-01-31 09:03:51,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-01-31 09:03:51,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 09:03:51,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:51,262 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:51,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 09:03:51,262 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1408101080, now seen corresponding path program 1 times [2022-01-31 09:03:51,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:51,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750716991] [2022-01-31 09:03:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:51,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:03:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:51,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750716991] [2022-01-31 09:03:51,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750716991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472363921] [2022-01-31 09:03:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:51,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:51,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:51,395 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) [2022-01-31 09:03:51,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:03:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:03:51,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:51,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:03:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:51,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:03:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:51,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:51,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:03:51,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 09:03:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:51,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472363921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:51,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:51,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 19 [2022-01-31 09:03:51,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859258559] [2022-01-31 09:03:51,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:51,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 09:03:51,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:51,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 09:03:51,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:03:51,691 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:03:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:51,983 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2022-01-31 09:03:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 09:03:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2022-01-31 09:03:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:51,984 INFO L225 Difference]: With dead ends: 125 [2022-01-31 09:03:51,984 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 09:03:51,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-01-31 09:03:51,984 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 95 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:51,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 204 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 401 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-01-31 09:03:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 09:03:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2022-01-31 09:03:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 78 states have internal predecessors, (91), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:03:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-01-31 09:03:51,988 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 36 [2022-01-31 09:03:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:51,988 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-01-31 09:03:51,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 5 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:03:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-01-31 09:03:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 09:03:51,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:51,989 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:52,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 09:03:52,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:52,196 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:52,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1942090531, now seen corresponding path program 1 times [2022-01-31 09:03:52,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:52,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703145640] [2022-01-31 09:03:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:52,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:52,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:52,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:03:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:03:52,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:52,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703145640] [2022-01-31 09:03:52,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703145640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:52,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:52,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:03:52,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937648251] [2022-01-31 09:03:52,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:52,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:03:52,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:03:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:52,224 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:03:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:52,257 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2022-01-31 09:03:52,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:03:52,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-01-31 09:03:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:52,258 INFO L225 Difference]: With dead ends: 99 [2022-01-31 09:03:52,258 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 09:03:52,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:52,258 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:52,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 55 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 09:03:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2022-01-31 09:03:52,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 78 states have internal predecessors, (90), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 09:03:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2022-01-31 09:03:52,262 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 41 [2022-01-31 09:03:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:52,262 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2022-01-31 09:03:52,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:03:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2022-01-31 09:03:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 09:03:52,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:52,262 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:52,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 09:03:52,263 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash 275667422, now seen corresponding path program 2 times [2022-01-31 09:03:52,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:52,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749424771] [2022-01-31 09:03:52,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:52,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:52,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:52,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:03:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:52,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:03:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:52,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:52,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749424771] [2022-01-31 09:03:52,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749424771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:52,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354991419] [2022-01-31 09:03:52,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:03:52,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:52,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:52,400 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) [2022-01-31 09:03:52,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:03:52,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:03:52,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 09:03:52,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:52,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:03:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:03:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:52,592 INFO L387 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 35 treesize of output 37 [2022-01-31 09:03:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:52,610 INFO L387 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 35 treesize of output 37 [2022-01-31 09:03:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:52,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:52,626 INFO L387 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 35 treesize of output 37 [2022-01-31 09:03:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:52,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:54,932 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_40 Int)) (or (forall ((v_ArrVal_192 Int)) (= (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~i~0_40 12) |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_192) (+ |c_main_~#volArray~0.offset| 4)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_40)))) is different from false [2022-01-31 09:04:03,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-01-31 09:04:03,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 346 treesize of output 338 [2022-01-31 09:04:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-31 09:04:03,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354991419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:03,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:03,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 27 [2022-01-31 09:04:03,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588980607] [2022-01-31 09:04:03,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:03,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 09:04:03,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:03,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 09:04:03,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=520, Unknown=22, NotChecked=48, Total=702 [2022-01-31 09:04:03,570 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:04:06,067 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|)) (.cse1 (* c_main_~i~0 12))) (and (= (select .cse0 (+ .cse1 |c_main_~#volArray~0.offset| (- 8))) 0) (= (select .cse0 (+ .cse1 (- 4) |c_main_~#volArray~0.offset|)) 0) (= |c_main_~#volArray~0.offset| 0) (forall ((v_main_~i~0_40 Int)) (or (forall ((v_ArrVal_192 Int)) (= (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~i~0_40 12) |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_192) (+ |c_main_~#volArray~0.offset| 4)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_40)))) (= c_main_~i~0 1))) is different from false [2022-01-31 09:04:08,942 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_main_~#volArray~0.base|))) (and (<= 2 c_main_~i~0) (= (select .cse0 (+ 8 |c_main_~#volArray~0.offset|)) 0) (= |c_main_~#volArray~0.offset| 0) (forall ((v_main_~i~0_40 Int)) (or (forall ((v_ArrVal_192 Int)) (= (select (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~i~0_40 12) |c_main_~#volArray~0.offset| (- 8)) v_ArrVal_192) (+ |c_main_~#volArray~0.offset| 4)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_40)))) (= (select .cse0 (+ |c_main_~#volArray~0.offset| 4)) 0))) is different from false [2022-01-31 09:04:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:15,554 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2022-01-31 09:04:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 09:04:15,554 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-01-31 09:04:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:15,555 INFO L225 Difference]: With dead ends: 195 [2022-01-31 09:04:15,555 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 09:04:15,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=330, Invalid=1619, Unknown=43, NotChecked=264, Total=2256 [2022-01-31 09:04:15,556 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 160 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:15,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 299 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 764 Invalid, 0 Unknown, 234 Unchecked, 0.3s Time] [2022-01-31 09:04:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 09:04:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 129. [2022-01-31 09:04:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 112 states have internal predecessors, (127), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 09:04:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2022-01-31 09:04:15,561 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 41 [2022-01-31 09:04:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:15,562 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2022-01-31 09:04:15,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 09:04:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2022-01-31 09:04:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 09:04:15,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:15,562 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:15,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:15,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 09:04:15,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1769619943, now seen corresponding path program 2 times [2022-01-31 09:04:15,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:15,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449105542] [2022-01-31 09:04:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:15,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:15,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:15,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:04:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:15,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:04:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:04:15,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:15,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449105542] [2022-01-31 09:04:15,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449105542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:15,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592990245] [2022-01-31 09:04:15,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:04:15,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:15,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:15,932 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) [2022-01-31 09:04:15,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:04:15,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:04:15,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 09:04:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:16,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:04:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:04:20,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:21,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-01-31 09:04:21,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-01-31 09:04:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 09:04:21,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592990245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:21,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:21,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 25 [2022-01-31 09:04:21,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737574405] [2022-01-31 09:04:21,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:21,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 09:04:21,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:21,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 09:04:21,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=510, Unknown=3, NotChecked=0, Total=600 [2022-01-31 09:04:21,684 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 23 states have internal predecessors, (72), 10 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 09:04:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:29,616 INFO L93 Difference]: Finished difference Result 216 states and 258 transitions. [2022-01-31 09:04:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 09:04:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 23 states have internal predecessors, (72), 10 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 45 [2022-01-31 09:04:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:29,618 INFO L225 Difference]: With dead ends: 216 [2022-01-31 09:04:29,618 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 09:04:29,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=399, Invalid=2455, Unknown=8, NotChecked=0, Total=2862 [2022-01-31 09:04:29,620 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 115 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:29,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 382 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1039 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2022-01-31 09:04:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 09:04:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 163. [2022-01-31 09:04:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 134 states have (on average 1.164179104477612) internal successors, (156), 140 states have internal predecessors, (156), 19 states have call successors, (19), 11 states have call predecessors, (19), 9 states have return successors, (18), 11 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 09:04:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 193 transitions. [2022-01-31 09:04:29,637 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 193 transitions. Word has length 45 [2022-01-31 09:04:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:29,637 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 193 transitions. [2022-01-31 09:04:29,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 23 states have internal predecessors, (72), 10 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 09:04:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 193 transitions. [2022-01-31 09:04:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 09:04:29,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:29,638 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:29,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 09:04:29,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 09:04:29,840 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:29,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:29,841 INFO L85 PathProgramCache]: Analyzing trace with hash 49512488, now seen corresponding path program 3 times [2022-01-31 09:04:29,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:29,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663655704] [2022-01-31 09:04:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:29,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:30,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:30,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:30,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 09:04:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:30,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 09:04:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:30,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 09:04:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:30,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663655704] [2022-01-31 09:04:30,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663655704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:30,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942029363] [2022-01-31 09:04:30,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:04:30,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:30,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:30,068 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) [2022-01-31 09:04:30,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:04:30,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 09:04:30,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:30,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 09:04:30,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:30,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:30,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942029363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:30,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:30,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 30 [2022-01-31 09:04:30,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067101391] [2022-01-31 09:04:30,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:30,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:04:30,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:04:30,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:04:30,735 INFO L87 Difference]: Start difference. First operand 163 states and 193 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 14 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 09:04:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:31,068 INFO L93 Difference]: Finished difference Result 232 states and 269 transitions. [2022-01-31 09:04:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 09:04:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 14 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 54 [2022-01-31 09:04:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:31,069 INFO L225 Difference]: With dead ends: 232 [2022-01-31 09:04:31,069 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 09:04:31,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 09:04:31,070 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 266 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:31,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 97 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:04:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 09:04:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2022-01-31 09:04:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 125 states have (on average 1.144) internal successors, (143), 130 states have internal predecessors, (143), 17 states have call successors, (17), 10 states have call predecessors, (17), 8 states have return successors, (16), 10 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:04:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2022-01-31 09:04:31,074 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 54 [2022-01-31 09:04:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:31,074 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2022-01-31 09:04:31,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 29 states have internal predecessors, (91), 14 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-01-31 09:04:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2022-01-31 09:04:31,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 09:04:31,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:31,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1] [2022-01-31 09:04:31,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:31,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:31,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash 348233598, now seen corresponding path program 4 times [2022-01-31 09:04:31,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:31,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356780865] [2022-01-31 09:04:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:31,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:31,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:31,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:04:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:31,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:04:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:31,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:04:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:31,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:31,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356780865] [2022-01-31 09:04:31,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356780865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:31,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396679499] [2022-01-31 09:04:31,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:04:31,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:31,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:31,536 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) [2022-01-31 09:04:31,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:04:31,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:04:31,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:31,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 09:04:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:31,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:31,732 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:04:31,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-01-31 09:04:31,749 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:04:31,749 INFO L387 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 23 treesize of output 22 [2022-01-31 09:04:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:38,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:38,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-01-31 09:04:38,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-01-31 09:04:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:39,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396679499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:39,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:39,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 38 [2022-01-31 09:04:39,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357563580] [2022-01-31 09:04:39,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:39,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 09:04:39,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 09:04:39,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1276, Unknown=2, NotChecked=0, Total=1406 [2022-01-31 09:04:39,083 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 38 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 15 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:04:44,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:44,019 INFO L93 Difference]: Finished difference Result 308 states and 375 transitions. [2022-01-31 09:04:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 09:04:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 15 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 59 [2022-01-31 09:04:44,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:44,021 INFO L225 Difference]: With dead ends: 308 [2022-01-31 09:04:44,021 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 09:04:44,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 106 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=867, Invalid=7500, Unknown=5, NotChecked=0, Total=8372 [2022-01-31 09:04:44,024 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 163 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:44,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 599 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1304 Invalid, 0 Unknown, 105 Unchecked, 0.6s Time] [2022-01-31 09:04:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 09:04:44,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 222. [2022-01-31 09:04:44,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 184 states have (on average 1.1304347826086956) internal successors, (208), 191 states have internal predecessors, (208), 27 states have call successors, (27), 12 states have call predecessors, (27), 10 states have return successors, (26), 18 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-31 09:04:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 261 transitions. [2022-01-31 09:04:44,046 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 261 transitions. Word has length 59 [2022-01-31 09:04:44,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:44,047 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 261 transitions. [2022-01-31 09:04:44,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 15 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 09:04:44,047 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 261 transitions. [2022-01-31 09:04:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 09:04:44,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:44,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:44,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:44,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 09:04:44,248 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1064022849, now seen corresponding path program 3 times [2022-01-31 09:04:44,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:44,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846036416] [2022-01-31 09:04:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:44,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:44,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:44,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:04:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:44,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:04:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:44,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:04:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:04:44,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:44,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846036416] [2022-01-31 09:04:44,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846036416] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:44,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459194753] [2022-01-31 09:04:44,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:04:44,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:44,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:44,414 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) [2022-01-31 09:04:44,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:04:44,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 09:04:44,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:04:44,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 09:04:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:44,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:44,557 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:04:44,557 INFO L387 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 29 treesize of output 28 [2022-01-31 09:04:44,570 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:04:44,570 INFO L387 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 23 treesize of output 22 [2022-01-31 09:04:44,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 09:04:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:44,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:44,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:04:44,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 09:04:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:44,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459194753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:44,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:44,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-01-31 09:04:44,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099596485] [2022-01-31 09:04:44,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:44,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:04:44,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:04:44,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:04:44,946 INFO L87 Difference]: Start difference. First operand 222 states and 261 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 11 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:04:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:04:46,676 INFO L93 Difference]: Finished difference Result 374 states and 452 transitions. [2022-01-31 09:04:46,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 09:04:46,677 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 11 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 59 [2022-01-31 09:04:46,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:04:46,678 INFO L225 Difference]: With dead ends: 374 [2022-01-31 09:04:46,678 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 09:04:46,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=771, Invalid=5871, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 09:04:46,680 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 237 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:04:46,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 420 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 09:04:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 09:04:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 217. [2022-01-31 09:04:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 176 states have (on average 1.1193181818181819) internal successors, (197), 186 states have internal predecessors, (197), 30 states have call successors, (30), 12 states have call predecessors, (30), 10 states have return successors, (29), 18 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-31 09:04:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 256 transitions. [2022-01-31 09:04:46,686 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 256 transitions. Word has length 59 [2022-01-31 09:04:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:04:46,687 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 256 transitions. [2022-01-31 09:04:46,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 25 states have internal predecessors, (88), 11 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:04:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 256 transitions. [2022-01-31 09:04:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 09:04:46,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:04:46,687 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:04:46,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:04:46,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 09:04:46,902 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:04:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:04:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash -466756163, now seen corresponding path program 1 times [2022-01-31 09:04:46,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:04:46,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360131429] [2022-01-31 09:04:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:46,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:04:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:47,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:04:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:47,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:04:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:47,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:04:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:47,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:04:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:47,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:04:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:47,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:04:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360131429] [2022-01-31 09:04:47,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360131429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:04:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903219616] [2022-01-31 09:04:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:04:47,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:04:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:04:47,116 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) [2022-01-31 09:04:47,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:04:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:04:47,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 09:04:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:04:47,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:04:47,243 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:04:47,244 INFO L387 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 29 treesize of output 28 [2022-01-31 09:04:47,256 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:04:47,256 INFO L387 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 23 treesize of output 22 [2022-01-31 09:04:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:47,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:04:54,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:04:54,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 09:04:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 09:04:54,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903219616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:04:54,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:04:54,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 28 [2022-01-31 09:04:54,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259307118] [2022-01-31 09:04:54,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:04:54,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 09:04:54,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:04:54,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 09:04:54,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=647, Unknown=4, NotChecked=0, Total=756 [2022-01-31 09:04:54,118 INFO L87 Difference]: Start difference. First operand 217 states and 256 transitions. Second operand has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:05:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:05,013 INFO L93 Difference]: Finished difference Result 299 states and 345 transitions. [2022-01-31 09:05:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 09:05:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 59 [2022-01-31 09:05:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:05,015 INFO L225 Difference]: With dead ends: 299 [2022-01-31 09:05:05,015 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 09:05:05,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 105 SyntacticMatches, 13 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=414, Invalid=2771, Unknown=7, NotChecked=0, Total=3192 [2022-01-31 09:05:05,016 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 117 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:05,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 375 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1252 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2022-01-31 09:05:05,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 09:05:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 242. [2022-01-31 09:05:05,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 195 states have (on average 1.1128205128205129) internal successors, (217), 205 states have internal predecessors, (217), 31 states have call successors, (31), 17 states have call predecessors, (31), 15 states have return successors, (30), 19 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-31 09:05:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 278 transitions. [2022-01-31 09:05:05,024 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 278 transitions. Word has length 59 [2022-01-31 09:05:05,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:05,025 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 278 transitions. [2022-01-31 09:05:05,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 25 states have internal predecessors, (94), 12 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-01-31 09:05:05,025 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 278 transitions. [2022-01-31 09:05:05,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 09:05:05,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:05,026 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:05,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:05:05,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:05,247 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1149132899, now seen corresponding path program 5 times [2022-01-31 09:05:05,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:05,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090151666] [2022-01-31 09:05:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:05,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:05,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:05,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:05,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:05:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:05,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:05:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:05:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:05,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 09:05:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:05,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:05,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090151666] [2022-01-31 09:05:05,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090151666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:05,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718296256] [2022-01-31 09:05:05,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:05:05,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:05,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:05,454 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:05:05,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:05:05,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 09:05:05,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 09:05:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:05,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:05:05,606 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:05:05,607 INFO L387 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 29 treesize of output 28 [2022-01-31 09:05:05,640 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:05:05,640 INFO L387 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 29 treesize of output 28 [2022-01-31 09:05:05,654 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:05:05,654 INFO L387 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 29 treesize of output 28 [2022-01-31 09:05:05,686 INFO L353 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-01-31 09:05:05,687 INFO L387 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 29 treesize of output 31 [2022-01-31 09:05:07,739 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#volArray~0.base_BEFORE_CALL_29| Int) (|v_main_~#volArray~0.offset_BEFORE_CALL_34| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_29|))) (<= (select .cse0 (+ |v_main_~#volArray~0.offset_BEFORE_CALL_34| 4)) (select .cse0 (+ |v_main_~#volArray~0.offset_BEFORE_CALL_34| 16))))) is different from true [2022-01-31 09:05:09,866 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#volArray~0.base_BEFORE_CALL_30| Int) (|v_main_~#volArray~0.offset_BEFORE_CALL_35| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_30|))) (<= (select .cse0 (+ |v_main_~#volArray~0.offset_BEFORE_CALL_35| 4)) (select .cse0 (+ |v_main_~#volArray~0.offset_BEFORE_CALL_35| 16))))) is different from true [2022-01-31 09:05:11,969 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#volArray~0.offset_BEFORE_CALL_36| Int) (|v_main_~#volArray~0.base_BEFORE_CALL_31| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_31|))) (<= (select .cse0 (+ |v_main_~#volArray~0.offset_BEFORE_CALL_36| 4)) (select .cse0 (+ |v_main_~#volArray~0.offset_BEFORE_CALL_36| 16))))) is different from true [2022-01-31 09:05:14,065 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#volArray~0.offset_BEFORE_CALL_37| Int) (|v_main_~#volArray~0.base_BEFORE_CALL_32| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_32|))) (<= (select .cse0 (+ |v_main_~#volArray~0.offset_BEFORE_CALL_37| 4)) (select .cse0 (+ |v_main_~#volArray~0.offset_BEFORE_CALL_37| 16))))) is different from true [2022-01-31 09:05:14,146 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 09:05:14,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-01-31 09:05:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 24 not checked. [2022-01-31 09:05:14,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:05:17,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-01-31 09:05:17,454 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 09:05:17,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 864 treesize of output 800 [2022-01-31 09:05:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:17,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718296256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:05:17,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:05:17,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 14] total 41 [2022-01-31 09:05:17,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729456978] [2022-01-31 09:05:17,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:05:17,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 09:05:17,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:05:17,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 09:05:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1209, Unknown=4, NotChecked=292, Total=1640 [2022-01-31 09:05:17,558 INFO L87 Difference]: Start difference. First operand 242 states and 278 transitions. Second operand has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 40 states have internal predecessors, (115), 15 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:05:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:05:35,263 INFO L93 Difference]: Finished difference Result 331 states and 386 transitions. [2022-01-31 09:05:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 09:05:35,264 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 40 states have internal predecessors, (115), 15 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 68 [2022-01-31 09:05:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:05:35,265 INFO L225 Difference]: With dead ends: 331 [2022-01-31 09:05:35,265 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 09:05:35,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 119 SyntacticMatches, 14 SemanticMatches, 77 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=544, Invalid=5015, Unknown=7, NotChecked=596, Total=6162 [2022-01-31 09:05:35,266 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 112 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:05:35,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 402 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1217 Invalid, 0 Unknown, 519 Unchecked, 0.5s Time] [2022-01-31 09:05:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 09:05:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 275. [2022-01-31 09:05:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 223 states have (on average 1.1210762331838564) internal successors, (250), 234 states have internal predecessors, (250), 35 states have call successors, (35), 18 states have call predecessors, (35), 16 states have return successors, (34), 22 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 09:05:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 319 transitions. [2022-01-31 09:05:35,272 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 319 transitions. Word has length 68 [2022-01-31 09:05:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:05:35,272 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 319 transitions. [2022-01-31 09:05:35,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 40 states have internal predecessors, (115), 15 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 09:05:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 319 transitions. [2022-01-31 09:05:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 09:05:35,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:05:35,273 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:05:35,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 09:05:35,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:35,474 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:05:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:05:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash 788882852, now seen corresponding path program 4 times [2022-01-31 09:05:35,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:05:35,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557234208] [2022-01-31 09:05:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:05:35,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:05:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:05:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:35,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:05:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:05:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:35,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:05:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:35,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:05:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:35,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 09:05:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:05:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:05:35,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:05:35,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557234208] [2022-01-31 09:05:35,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557234208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:05:35,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825227099] [2022-01-31 09:05:35,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:05:35,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:05:35,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:05:35,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:05:35,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 09:05:35,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:05:35,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:05:35,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 09:05:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:05:35,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:05:35,767 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:05:35,775 INFO L387 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 29 treesize of output 28 [2022-01-31 09:06:04,786 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:06:04,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-01-31 09:06:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:06:04,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:06,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:06:06,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 09:06:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:06:06,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825227099] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:06,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:06,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 22 [2022-01-31 09:06:06,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765366216] [2022-01-31 09:06:06,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:06,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 09:06:06,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:06,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 09:06:06,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=396, Unknown=5, NotChecked=0, Total=462 [2022-01-31 09:06:06,974 INFO L87 Difference]: Start difference. First operand 275 states and 319 transitions. Second operand has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 09:06:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:16,718 INFO L93 Difference]: Finished difference Result 374 states and 431 transitions. [2022-01-31 09:06:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 09:06:16,719 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 68 [2022-01-31 09:06:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:16,720 INFO L225 Difference]: With dead ends: 374 [2022-01-31 09:06:16,720 INFO L226 Difference]: Without dead ends: 374 [2022-01-31 09:06:16,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=412, Invalid=3117, Unknown=11, NotChecked=0, Total=3540 [2022-01-31 09:06:16,721 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 106 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:16,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 430 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1439 Invalid, 0 Unknown, 85 Unchecked, 0.6s Time] [2022-01-31 09:06:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-31 09:06:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 298. [2022-01-31 09:06:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 240 states have (on average 1.1166666666666667) internal successors, (268), 252 states have internal predecessors, (268), 38 states have call successors, (38), 21 states have call predecessors, (38), 19 states have return successors, (37), 24 states have call predecessors, (37), 37 states have call successors, (37) [2022-01-31 09:06:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 343 transitions. [2022-01-31 09:06:16,728 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 343 transitions. Word has length 68 [2022-01-31 09:06:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:16,728 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 343 transitions. [2022-01-31 09:06:16,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 09:06:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 343 transitions. [2022-01-31 09:06:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 09:06:16,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:16,729 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:16,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 09:06:16,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-31 09:06:16,943 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1563700962, now seen corresponding path program 6 times [2022-01-31 09:06:16,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:16,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193773855] [2022-01-31 09:06:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:16,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:17,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:17,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:06:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:17,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:06:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:06:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:17,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 09:06:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 09:06:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:17,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:17,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193773855] [2022-01-31 09:06:17,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193773855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:17,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741205558] [2022-01-31 09:06:17,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:06:17,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:17,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:17,130 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:06:17,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 09:06:17,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 09:06:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:06:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 09:06:17,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:17,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:06:17,294 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:06:17,294 INFO L387 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 26 treesize of output 25 [2022-01-31 09:06:17,310 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:06:17,310 INFO L387 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 26 treesize of output 25 [2022-01-31 09:06:17,320 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:06:17,320 INFO L387 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 23 treesize of output 22 [2022-01-31 09:06:18,125 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 09:06:18,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2022-01-31 09:06:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:18,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:06:18,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-01-31 09:06:18,527 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 09:06:18,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 303 [2022-01-31 09:06:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:18,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741205558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:06:18,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:06:18,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 40 [2022-01-31 09:06:18,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422550671] [2022-01-31 09:06:18,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:06:18,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 09:06:18,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 09:06:18,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:06:18,596 INFO L87 Difference]: Start difference. First operand 298 states and 343 transitions. Second operand has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 states have internal predecessors, (119), 18 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-01-31 09:06:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:21,606 INFO L93 Difference]: Finished difference Result 476 states and 557 transitions. [2022-01-31 09:06:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 09:06:21,606 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 states have internal predecessors, (119), 18 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 77 [2022-01-31 09:06:21,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:21,608 INFO L225 Difference]: With dead ends: 476 [2022-01-31 09:06:21,608 INFO L226 Difference]: Without dead ends: 476 [2022-01-31 09:06:21,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 140 SyntacticMatches, 15 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3556 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1128, Invalid=10214, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 09:06:21,610 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 319 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:21,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 720 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 2292 Invalid, 0 Unknown, 179 Unchecked, 1.1s Time] [2022-01-31 09:06:21,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-31 09:06:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 375. [2022-01-31 09:06:21,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 300 states have (on average 1.1033333333333333) internal successors, (331), 315 states have internal predecessors, (331), 51 states have call successors, (51), 25 states have call predecessors, (51), 23 states have return successors, (50), 34 states have call predecessors, (50), 50 states have call successors, (50) [2022-01-31 09:06:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 432 transitions. [2022-01-31 09:06:21,621 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 432 transitions. Word has length 77 [2022-01-31 09:06:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:21,621 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 432 transitions. [2022-01-31 09:06:21,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 39 states have internal predecessors, (119), 18 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-01-31 09:06:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 432 transitions. [2022-01-31 09:06:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 09:06:21,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:21,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:21,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 09:06:21,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-31 09:06:21,849 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:21,849 INFO L85 PathProgramCache]: Analyzing trace with hash 822074460, now seen corresponding path program 1 times [2022-01-31 09:06:21,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:21,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278094375] [2022-01-31 09:06:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:21,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:21,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:21,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:21,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:06:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:21,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:06:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:21,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:06:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:21,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 09:06:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 09:06:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 09:06:21,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:21,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278094375] [2022-01-31 09:06:21,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278094375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:06:21,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:06:21,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:06:21,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234197914] [2022-01-31 09:06:21,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:06:21,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:06:21,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:06:21,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:06:21,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:06:21,886 INFO L87 Difference]: Start difference. First operand 375 states and 432 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:06:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:06:21,947 INFO L93 Difference]: Finished difference Result 370 states and 423 transitions. [2022-01-31 09:06:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:06:21,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2022-01-31 09:06:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:06:21,949 INFO L225 Difference]: With dead ends: 370 [2022-01-31 09:06:21,949 INFO L226 Difference]: Without dead ends: 370 [2022-01-31 09:06:21,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:06:21,950 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:06:21,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 65 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:06:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-31 09:06:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 359. [2022-01-31 09:06:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 287 states have (on average 1.0905923344947734) internal successors, (313), 301 states have internal predecessors, (313), 48 states have call successors, (48), 25 states have call predecessors, (48), 23 states have return successors, (47), 32 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 09:06:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 408 transitions. [2022-01-31 09:06:21,957 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 408 transitions. Word has length 77 [2022-01-31 09:06:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:06:21,957 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 408 transitions. [2022-01-31 09:06:21,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 09:06:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 408 transitions. [2022-01-31 09:06:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 09:06:21,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:06:21,959 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:06:21,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 09:06:21,959 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:06:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:06:21,959 INFO L85 PathProgramCache]: Analyzing trace with hash -769396290, now seen corresponding path program 1 times [2022-01-31 09:06:21,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:06:21,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698683402] [2022-01-31 09:06:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:21,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:06:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:06:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:06:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 09:06:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 09:06:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:06:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 09:06:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 09:06:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:06:22,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:06:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698683402] [2022-01-31 09:06:22,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698683402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:06:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110193785] [2022-01-31 09:06:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:06:22,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:06:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:06:22,165 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:06:22,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 09:06:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:06:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 09:06:22,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:06:22,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:07:09,679 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:07:09,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-01-31 09:07:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:07:09,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:07:11,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-01-31 09:07:11,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-01-31 09:07:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 72 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:07:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110193785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:07:11,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:07:11,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 24 [2022-01-31 09:07:11,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904216420] [2022-01-31 09:07:11,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:07:11,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:07:11,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:07:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:07:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=478, Unknown=6, NotChecked=0, Total=552 [2022-01-31 09:07:11,865 INFO L87 Difference]: Start difference. First operand 359 states and 408 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 09:07:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:07:22,607 INFO L93 Difference]: Finished difference Result 489 states and 556 transitions. [2022-01-31 09:07:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 09:07:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 77 [2022-01-31 09:07:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:07:22,609 INFO L225 Difference]: With dead ends: 489 [2022-01-31 09:07:22,609 INFO L226 Difference]: Without dead ends: 489 [2022-01-31 09:07:22,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 152 SyntacticMatches, 16 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 59.3s TimeCoverageRelationStatistics Valid=497, Invalid=4460, Unknown=13, NotChecked=0, Total=4970 [2022-01-31 09:07:22,611 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 141 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 09:07:22,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 555 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1724 Invalid, 0 Unknown, 136 Unchecked, 0.7s Time] [2022-01-31 09:07:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-31 09:07:22,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 400. [2022-01-31 09:07:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 318 states have (on average 1.0911949685534592) internal successors, (347), 333 states have internal predecessors, (347), 53 states have call successors, (53), 30 states have call predecessors, (53), 28 states have return successors, (52), 36 states have call predecessors, (52), 52 states have call successors, (52) [2022-01-31 09:07:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 452 transitions. [2022-01-31 09:07:22,619 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 452 transitions. Word has length 77 [2022-01-31 09:07:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:07:22,619 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 452 transitions. [2022-01-31 09:07:22,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 09:07:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 452 transitions. [2022-01-31 09:07:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 09:07:22,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:07:22,620 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:07:22,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 09:07:22,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:22,830 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:07:22,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:07:22,830 INFO L85 PathProgramCache]: Analyzing trace with hash 270890531, now seen corresponding path program 7 times [2022-01-31 09:07:22,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:07:22,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175055300] [2022-01-31 09:07:22,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:07:22,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:07:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:23,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:07:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:23,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 09:07:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:23,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 09:07:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:23,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 09:07:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 09:07:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:23,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 09:07:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:07:23,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:07:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175055300] [2022-01-31 09:07:23,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175055300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:07:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004621561] [2022-01-31 09:07:23,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:07:23,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:07:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:07:23,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:07:23,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 09:07:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:07:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 09:07:23,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:07:23,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-01-31 09:07:23,421 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-31 09:07:23,421 INFO L387 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 29 treesize of output 28 [2022-01-31 09:07:23,459 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:23,460 INFO L387 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 26 treesize of output 25 [2022-01-31 09:07:23,470 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:23,470 INFO L387 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 26 treesize of output 25 [2022-01-31 09:07:23,483 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:23,483 INFO L387 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 26 treesize of output 25 [2022-01-31 09:07:23,510 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:23,510 INFO L387 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 26 treesize of output 25 [2022-01-31 09:07:23,520 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:23,520 INFO L387 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 26 treesize of output 25 [2022-01-31 09:07:23,530 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-31 09:07:23,531 INFO L387 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 26 treesize of output 25 [2022-01-31 09:07:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 09:07:56,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:10:40,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 111 [2022-01-31 09:10:40,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221647 treesize of output 221135