/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-programs/partial_mod_count_limited_base.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:27:03,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:27:03,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:27:03,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:27:03,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:27:03,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:27:03,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:27:03,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:27:03,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:27:03,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:27:03,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:27:03,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:27:03,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:27:03,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:27:03,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:27:03,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:27:03,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:27:03,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:27:03,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:27:03,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:27:03,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:27:03,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:27:03,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:27:03,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:27:03,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:27:03,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:27:03,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:27:03,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:27:03,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:27:03,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:27:03,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:27:03,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:27:03,597 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:27:03,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:27:03,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:27:03,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:27:03,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:27:03,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:27:03,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:27:03,598 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:27:03,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:27:03,598 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:27:03,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:27:03,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:27:03,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:27:03,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:27:03,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:27:03,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:27:03,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:27:03,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:27:03,599 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:27:03,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:27:03,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:27:03,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:27:03,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:27:03,810 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:27:03,810 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:27:03,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_base.c [2022-01-31 09:27:03,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c468120/7d79e3f36aa645e49380a1305310d2f0/FLAG45c17d0ab [2022-01-31 09:27:04,175 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:27:04,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_base.c [2022-01-31 09:27:04,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c468120/7d79e3f36aa645e49380a1305310d2f0/FLAG45c17d0ab [2022-01-31 09:27:04,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3c468120/7d79e3f36aa645e49380a1305310d2f0 [2022-01-31 09:27:04,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:27:04,617 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:27:04,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:27:04,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:27:04,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:27:04,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3055c4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04, skipping insertion in model container [2022-01-31 09:27:04,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:27:04,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:27:04,764 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-programs/partial_mod_count_limited_base.c[334,347] [2022-01-31 09:27:04,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:27:04,780 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:27:04,790 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-programs/partial_mod_count_limited_base.c[334,347] [2022-01-31 09:27:04,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:27:04,810 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:27:04,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04 WrapperNode [2022-01-31 09:27:04,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:27:04,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:27:04,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:27:04,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:27:04,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:27:04,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:27:04,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:27:04,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:27:04,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (1/1) ... [2022-01-31 09:27:04,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:27:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:04,878 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 09:27:04,884 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 09:27:04,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:27:04,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:27:04,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:27:04,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:27:04,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:27:04,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:27:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:27:04,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:27:04,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:27:04,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:27:04,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:27:04,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:27:04,952 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:27:04,954 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:27:05,064 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:27:05,068 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:27:05,068 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:27:05,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:27:05 BoogieIcfgContainer [2022-01-31 09:27:05,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:27:05,070 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:27:05,070 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:27:05,071 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:27:05,073 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:27:05" (1/1) ... [2022-01-31 09:27:05,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:27:05 BasicIcfg [2022-01-31 09:27:05,086 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:27:05,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:27:05,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:27:05,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:27:05,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:27:04" (1/4) ... [2022-01-31 09:27:05,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99b021f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:27:05, skipping insertion in model container [2022-01-31 09:27:05,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:04" (2/4) ... [2022-01-31 09:27:05,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99b021f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:27:05, skipping insertion in model container [2022-01-31 09:27:05,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:27:05" (3/4) ... [2022-01-31 09:27:05,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99b021f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:27:05, skipping insertion in model container [2022-01-31 09:27:05,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:27:05" (4/4) ... [2022-01-31 09:27:05,093 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_base.cJordan [2022-01-31 09:27:05,097 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:27:05,097 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:27:05,171 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:27:05,176 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 09:27:05,176 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:27:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 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 09:27:05,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:27:05,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:05,205 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] [2022-01-31 09:27:05,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:05,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1836216133, now seen corresponding path program 1 times [2022-01-31 09:27:05,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:05,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006741495] [2022-01-31 09:27:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:05,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:27:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:27:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,426 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 09:27:05,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:05,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006741495] [2022-01-31 09:27:05,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006741495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:27:05,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:27:05,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:27:05,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020891191] [2022-01-31 09:27:05,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:27:05,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:27:05,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:05,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:27:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:27:05,466 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 09:27:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:05,524 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-31 09:27:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:27:05,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 20 [2022-01-31 09:27:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:05,537 INFO L225 Difference]: With dead ends: 33 [2022-01-31 09:27:05,538 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 09:27:05,539 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 09:27:05,545 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:05,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:27:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 09:27:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 09:27:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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 09:27:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 09:27:05,576 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-31 09:27:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:05,576 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 09:27:05,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 09:27:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 09:27:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:27:05,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:05,578 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] [2022-01-31 09:27:05,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:27:05,578 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash 35676921, now seen corresponding path program 1 times [2022-01-31 09:27:05,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:05,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997369120] [2022-01-31 09:27:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:05,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:27:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:27:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,687 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 09:27:05,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:05,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997369120] [2022-01-31 09:27:05,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997369120] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:27:05,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:27:05,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 09:27:05,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730345] [2022-01-31 09:27:05,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:27:05,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:27:05,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:27:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:27:05,690 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:27:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:05,774 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-01-31 09:27:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:27:05,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-31 09:27:05,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:05,776 INFO L225 Difference]: With dead ends: 37 [2022-01-31 09:27:05,776 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 09:27:05,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:27:05,778 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:05,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 24 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:27:05,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 09:27:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-31 09:27:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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 09:27:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 09:27:05,788 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-31 09:27:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:05,788 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 09:27:05,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:27:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 09:27:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 09:27:05,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:05,789 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] [2022-01-31 09:27:05,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:27:05,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash -168804664, now seen corresponding path program 1 times [2022-01-31 09:27:05,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:05,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87934530] [2022-01-31 09:27:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:05,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:27:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:27:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:05,917 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 09:27:05,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:05,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87934530] [2022-01-31 09:27:05,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87934530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:27:05,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:27:05,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 09:27:05,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954410090] [2022-01-31 09:27:05,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:27:05,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:27:05,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:05,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:27:05,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:27:05,920 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (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 09:27:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:06,041 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-01-31 09:27:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:27:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (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 25 [2022-01-31 09:27:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:06,044 INFO L225 Difference]: With dead ends: 37 [2022-01-31 09:27:06,044 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 09:27:06,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:27:06,051 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:06,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 31 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:27:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 09:27:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-31 09:27:06,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 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 09:27:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-01-31 09:27:06,062 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2022-01-31 09:27:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:06,063 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-01-31 09:27:06,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (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 09:27:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-01-31 09:27:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 09:27:06,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:06,064 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] [2022-01-31 09:27:06,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 09:27:06,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:06,065 INFO L85 PathProgramCache]: Analyzing trace with hash -365318169, now seen corresponding path program 1 times [2022-01-31 09:27:06,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:06,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159378359] [2022-01-31 09:27:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:06,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:06,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:27:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:06,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:27:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 09:27:06,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:06,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159378359] [2022-01-31 09:27:06,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159378359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:27:06,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:27:06,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 09:27:06,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552635582] [2022-01-31 09:27:06,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:27:06,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 09:27:06,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:06,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 09:27:06,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:27:06,163 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 09:27:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:06,277 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-01-31 09:27:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 09:27:06,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 25 [2022-01-31 09:27:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:06,280 INFO L225 Difference]: With dead ends: 44 [2022-01-31 09:27:06,280 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 09:27:06,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 09:27:06,288 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:06,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 40 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:27:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 09:27:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 09:27:06,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:27:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-01-31 09:27:06,298 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 25 [2022-01-31 09:27:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:06,299 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-01-31 09:27:06,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 09:27:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-01-31 09:27:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 09:27:06,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:06,302 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, 1] [2022-01-31 09:27:06,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 09:27:06,302 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:06,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:06,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2057268538, now seen corresponding path program 1 times [2022-01-31 09:27:06,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:06,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187226838] [2022-01-31 09:27:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:06,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:06,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:27:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:06,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:27:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:06,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-31 09:27:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:27:06,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187226838] [2022-01-31 09:27:06,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187226838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:27:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990724158] [2022-01-31 09:27:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:06,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:06,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:06,415 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 09:27:06,416 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 09:27:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:06,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:27:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:27:06,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:27:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:27:06,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990724158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:27:06,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:27:06,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-31 09:27:06,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474204016] [2022-01-31 09:27:06,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:27:06,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 09:27:06,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 09:27:06,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:27:06,709 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-31 09:27:06,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:06,887 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2022-01-31 09:27:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 09:27:06,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2022-01-31 09:27:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:06,890 INFO L225 Difference]: With dead ends: 87 [2022-01-31 09:27:06,891 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 09:27:06,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-31 09:27:06,892 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:06,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 30 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:27:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 09:27:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 56. [2022-01-31 09:27:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:27:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-01-31 09:27:06,906 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2022-01-31 09:27:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:06,906 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-01-31 09:27:06,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-31 09:27:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-01-31 09:27:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 09:27:06,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:06,909 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-01-31 09:27:06,944 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 09:27:07,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:07,124 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1082734791, now seen corresponding path program 1 times [2022-01-31 09:27:07,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:07,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761984187] [2022-01-31 09:27:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:07,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:07,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:27:07,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608451471] [2022-01-31 09:27:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:07,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:07,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:07,146 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 09:27:07,147 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 09:27:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:07,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 09:27:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 09:27:07,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:27:07,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:07,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761984187] [2022-01-31 09:27:07,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:27:07,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608451471] [2022-01-31 09:27:07,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608451471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:27:07,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:27:07,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:27:07,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175954694] [2022-01-31 09:27:07,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:27:07,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:27:07,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:07,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:27:07,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:27:07,329 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:27:07,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:07,346 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-01-31 09:27:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:27:07,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 48 [2022-01-31 09:27:07,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:07,347 INFO L225 Difference]: With dead ends: 81 [2022-01-31 09:27:07,347 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 09:27:07,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:27:07,348 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:07,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 61 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:27:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 09:27:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2022-01-31 09:27:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:27:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2022-01-31 09:27:07,353 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 48 [2022-01-31 09:27:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:07,353 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2022-01-31 09:27:07,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:27:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2022-01-31 09:27:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 09:27:07,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:07,354 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:27:07,374 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 09:27:07,572 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,SelfDestructingSolverStorable5 [2022-01-31 09:27:07,572 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:07,573 INFO L85 PathProgramCache]: Analyzing trace with hash 726198937, now seen corresponding path program 1 times [2022-01-31 09:27:07,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:07,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216343897] [2022-01-31 09:27:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:07,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:07,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:27:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:07,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:27:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:07,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 09:27:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 09:27:07,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216343897] [2022-01-31 09:27:07,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216343897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:27:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132051256] [2022-01-31 09:27:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:07,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:07,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:07,685 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 09:27:07,686 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 09:27:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:07,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:27:07,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:27:07,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:27:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:27:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132051256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:27:08,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:27:08,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-01-31 09:27:08,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524502961] [2022-01-31 09:27:08,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:27:08,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 09:27:08,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 09:27:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-01-31 09:27:08,104 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-31 09:27:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:08,890 INFO L93 Difference]: Finished difference Result 270 states and 354 transitions. [2022-01-31 09:27:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 09:27:08,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2022-01-31 09:27:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:08,893 INFO L225 Difference]: With dead ends: 270 [2022-01-31 09:27:08,893 INFO L226 Difference]: Without dead ends: 270 [2022-01-31 09:27:08,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=856, Invalid=1796, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 09:27:08,895 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 290 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:08,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 30 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:27:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-31 09:27:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 148. [2022-01-31 09:27:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 137 states have internal predecessors, (171), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:27:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2022-01-31 09:27:08,904 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 48 [2022-01-31 09:27:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:08,904 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2022-01-31 09:27:08,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-31 09:27:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2022-01-31 09:27:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 09:27:08,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:08,906 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 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] [2022-01-31 09:27:08,924 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 09:27:09,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:09,124 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1923686886, now seen corresponding path program 2 times [2022-01-31 09:27:09,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:09,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153571065] [2022-01-31 09:27:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:09,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:09,142 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:27:09,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430031007] [2022-01-31 09:27:09,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:27:09,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:09,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:09,143 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 09:27:09,144 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 09:27:09,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:27:09,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:27:09,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:27:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:27:09,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:27:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:27:09,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:09,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153571065] [2022-01-31 09:27:09,871 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:27:09,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430031007] [2022-01-31 09:27:09,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430031007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:27:09,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:27:09,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 09:27:09,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272177893] [2022-01-31 09:27:09,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:27:09,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:27:09,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:27:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:27:09,873 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:27:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:10,377 INFO L93 Difference]: Finished difference Result 1232 states and 1538 transitions. [2022-01-31 09:27:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:27:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-31 09:27:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:10,381 INFO L225 Difference]: With dead ends: 1232 [2022-01-31 09:27:10,381 INFO L226 Difference]: Without dead ends: 1232 [2022-01-31 09:27:10,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:27:10,382 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 584 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:10,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 167 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:27:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-01-31 09:27:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 320. [2022-01-31 09:27:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 309 states have (on average 1.220064724919094) internal successors, (377), 309 states have internal predecessors, (377), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:27:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 388 transitions. [2022-01-31 09:27:10,404 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 388 transitions. Word has length 78 [2022-01-31 09:27:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:10,404 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 388 transitions. [2022-01-31 09:27:10,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:27:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 388 transitions. [2022-01-31 09:27:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 09:27:10,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:10,406 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 16, 6, 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 09:27:10,440 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 09:27:10,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:10,623 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash -392073442, now seen corresponding path program 2 times [2022-01-31 09:27:10,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:10,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689647242] [2022-01-31 09:27:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:10,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:10,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:27:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:10,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:27:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:10,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 09:27:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 185 proven. 4 refuted. 0 times theorem prover too weak. 993 trivial. 0 not checked. [2022-01-31 09:27:10,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689647242] [2022-01-31 09:27:10,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689647242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:27:10,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503385258] [2022-01-31 09:27:10,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:27:10,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:10,770 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 09:27:10,771 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 09:27:10,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:27:10,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:27:10,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:27:10,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:27:11,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:27:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:27:12,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503385258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:27:12,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:27:12,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 26, 26] total 55 [2022-01-31 09:27:12,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415682684] [2022-01-31 09:27:12,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:27:12,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 09:27:12,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:12,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 09:27:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1781, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 09:27:12,518 INFO L87 Difference]: Start difference. First operand 320 states and 388 transitions. Second operand has 55 states, 55 states have (on average 4.872727272727273) internal successors, (268), 54 states have internal predecessors, (268), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 09:27:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:18,231 INFO L93 Difference]: Finished difference Result 1004 states and 1322 transitions. [2022-01-31 09:27:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 09:27:18,232 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.872727272727273) internal successors, (268), 54 states have internal predecessors, (268), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 138 [2022-01-31 09:27:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:18,237 INFO L225 Difference]: With dead ends: 1004 [2022-01-31 09:27:18,238 INFO L226 Difference]: Without dead ends: 1004 [2022-01-31 09:27:18,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13847 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=11761, Invalid=26069, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 09:27:18,248 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2001 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2001 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:18,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2001 Valid, 52 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 09:27:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-01-31 09:27:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 424. [2022-01-31 09:27:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 413 states have (on average 1.12590799031477) internal successors, (465), 413 states have internal predecessors, (465), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:27:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 476 transitions. [2022-01-31 09:27:18,274 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 476 transitions. Word has length 138 [2022-01-31 09:27:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:18,275 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 476 transitions. [2022-01-31 09:27:18,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.872727272727273) internal successors, (268), 54 states have internal predecessors, (268), 4 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 09:27:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 476 transitions. [2022-01-31 09:27:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-31 09:27:18,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:18,283 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 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] [2022-01-31 09:27:18,305 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 09:27:18,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:18,506 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1618908442, now seen corresponding path program 3 times [2022-01-31 09:27:18,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:18,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162432471] [2022-01-31 09:27:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:18,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:18,550 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:27:18,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850657565] [2022-01-31 09:27:18,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:27:18,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:18,551 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 09:27:18,602 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 09:27:19,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-01-31 09:27:19,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:27:19,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 09:27:19,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 2665 proven. 1357 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2022-01-31 09:27:20,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:27:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 2 proven. 4022 refuted. 0 times theorem prover too weak. 1202 trivial. 0 not checked. [2022-01-31 09:27:21,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162432471] [2022-01-31 09:27:21,887 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:27:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850657565] [2022-01-31 09:27:21,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850657565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:27:21,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:27:21,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-01-31 09:27:21,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064940460] [2022-01-31 09:27:21,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:27:21,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 09:27:21,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:21,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 09:27:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1346, Invalid=1734, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 09:27:21,889 INFO L87 Difference]: Start difference. First operand 424 states and 476 transitions. Second operand has 56 states, 56 states have (on average 4.928571428571429) internal successors, (276), 56 states have internal predecessors, (276), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:27:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:27:28,271 INFO L93 Difference]: Finished difference Result 5927 states and 7072 transitions. [2022-01-31 09:27:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 09:27:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.928571428571429) internal successors, (276), 56 states have internal predecessors, (276), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 258 [2022-01-31 09:27:28,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:27:28,288 INFO L225 Difference]: With dead ends: 5927 [2022-01-31 09:27:28,289 INFO L226 Difference]: Without dead ends: 5927 [2022-01-31 09:27:28,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11569 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=11026, Invalid=20126, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 09:27:28,293 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2244 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2266 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:27:28,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2266 Valid, 291 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 09:27:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2022-01-31 09:27:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 862. [2022-01-31 09:27:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 851 states have (on average 1.1762632197414806) internal successors, (1001), 851 states have internal predecessors, (1001), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:27:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1012 transitions. [2022-01-31 09:27:28,339 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1012 transitions. Word has length 258 [2022-01-31 09:27:28,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:27:28,340 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1012 transitions. [2022-01-31 09:27:28,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.928571428571429) internal successors, (276), 56 states have internal predecessors, (276), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 09:27:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1012 transitions. [2022-01-31 09:27:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-01-31 09:27:28,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:27:28,342 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 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 09:27:28,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:27:28,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:28,548 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:27:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:27:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash -572733992, now seen corresponding path program 2 times [2022-01-31 09:27:28,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:27:28,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791784415] [2022-01-31 09:27:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:27:28,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:27:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:30,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:27:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:30,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 09:27:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:30,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2022-01-31 09:27:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:27:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 2 proven. 5688 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:27:30,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:27:30,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791784415] [2022-01-31 09:27:30,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791784415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:27:30,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092369502] [2022-01-31 09:27:30,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:27:30,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:27:30,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:27:30,789 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 09:27:30,790 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 09:27:30,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:27:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:27:30,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-31 09:27:30,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:27:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 0 proven. 5688 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:27:33,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:27:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5693 backedges. 2 proven. 5688 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:27:41,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092369502] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:27:41,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:27:41,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 152 [2022-01-31 09:27:41,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353340678] [2022-01-31 09:27:41,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:27:41,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 09:27:41,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:27:41,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 09:27:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10005, Invalid=12947, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 09:27:41,346 INFO L87 Difference]: Start difference. First operand 862 states and 1012 transitions. Second operand has 152 states, 152 states have (on average 4.940789473684211) internal successors, (751), 151 states have internal predecessors, (751), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-31 09:28:03,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:28:03,295 INFO L93 Difference]: Finished difference Result 19551 states and 23711 transitions. [2022-01-31 09:28:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 09:28:03,300 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 4.940789473684211) internal successors, (751), 151 states have internal predecessors, (751), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 268 [2022-01-31 09:28:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:28:03,350 INFO L225 Difference]: With dead ends: 19551 [2022-01-31 09:28:03,350 INFO L226 Difference]: Without dead ends: 19551 [2022-01-31 09:28:03,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19399 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=21427, Invalid=41323, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 09:28:03,354 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3884 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 1930 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3884 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1930 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:28:03,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3884 Valid, 43 Invalid, 3977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1930 Valid, 2047 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-01-31 09:28:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19551 states. [2022-01-31 09:28:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19551 to 1137. [2022-01-31 09:28:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1126 states have (on average 1.1802841918294849) internal successors, (1329), 1126 states have internal predecessors, (1329), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 09:28:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1340 transitions. [2022-01-31 09:28:03,487 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1340 transitions. Word has length 268 [2022-01-31 09:28:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:28:03,488 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 1340 transitions. [2022-01-31 09:28:03,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 4.940789473684211) internal successors, (751), 151 states have internal predecessors, (751), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-01-31 09:28:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1340 transitions. [2022-01-31 09:28:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-01-31 09:28:03,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:28:03,493 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 97, 97, 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] [2022-01-31 09:28:03,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 09:28:03,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:28:03,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:28:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:28:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1547180006, now seen corresponding path program 4 times [2022-01-31 09:28:03,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:28:03,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262953746] [2022-01-31 09:28:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:28:03,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:28:03,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:28:03,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386807433] [2022-01-31 09:28:03,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:28:03,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:28:03,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:28:03,760 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 09:28:03,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process