/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-lopstr16/break-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:49:08,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:49:08,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:49:08,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:49:08,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:49:08,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:49:08,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:49:08,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:49:08,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:49:08,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:49:08,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:49:08,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:49:08,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:49:08,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:49:08,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:49:08,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:49:08,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:49:08,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:49:08,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:49:08,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:49:08,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:49:08,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:49:08,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:49:08,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:49:08,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:49:08,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:49:08,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:49:08,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:49:08,557 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:49:08,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:49:08,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:49:08,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:49:08,571 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:49:08,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:49:08,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:49:08,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:49:08,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:49:08,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:49:08,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:49:08,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:49:08,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:49:08,573 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:49:08,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:49:08,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:49:08,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:49:08,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:49:08,773 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:49:08,773 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:49:08,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/break-2.i [2022-01-31 10:49:08,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82780ab3b/2b800be405fd4b37bc3c73417343fd39/FLAG96dd1f23c [2022-01-31 10:49:09,230 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:49:09,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/break-2.i [2022-01-31 10:49:09,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82780ab3b/2b800be405fd4b37bc3c73417343fd39/FLAG96dd1f23c [2022-01-31 10:49:09,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82780ab3b/2b800be405fd4b37bc3c73417343fd39 [2022-01-31 10:49:09,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:49:09,621 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:49:09,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:49:09,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:49:09,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:49:09,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:49:09" (1/1) ... [2022-01-31 10:49:09,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f2a7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:09, skipping insertion in model container [2022-01-31 10:49:09,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:49:09" (1/1) ... [2022-01-31 10:49:09,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:49:09,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:49:09,775 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-lopstr16/break-2.i[800,813] [2022-01-31 10:49:09,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:49:14,053 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:49:14,061 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-lopstr16/break-2.i[800,813] [2022-01-31 10:49:14,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:49:14,075 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:49:14,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14 WrapperNode [2022-01-31 10:49:14,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:49:14,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:49:14,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:49:14,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:49:14,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:49:14,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:49:14,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:49:14,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:49:14,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:49:14,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:14,125 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 10:49:14,143 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 10:49:14,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:49:14,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:49:14,159 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:49:14,159 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:49:14,159 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:49:14,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:49:14,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:49:14,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 10:49:14,159 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 10:49:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:49:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:49:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:49:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:49:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:49:14,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:49:14,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:49:14,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:49:14,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:49:14,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:49:14,227 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:49:14,229 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:49:14,362 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:49:14,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:49:14,366 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 10:49:14,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:49:14 BoogieIcfgContainer [2022-01-31 10:49:14,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:49:14,368 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:49:14,368 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:49:14,375 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:49:14,377 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:49:14" (1/1) ... [2022-01-31 10:49:14,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:49:14 BasicIcfg [2022-01-31 10:49:14,401 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:49:14,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:49:14,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:49:14,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:49:14,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:49:09" (1/4) ... [2022-01-31 10:49:14,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44107f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:49:14, skipping insertion in model container [2022-01-31 10:49:14,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:49:14" (2/4) ... [2022-01-31 10:49:14,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44107f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:49:14, skipping insertion in model container [2022-01-31 10:49:14,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:49:14" (3/4) ... [2022-01-31 10:49:14,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44107f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:49:14, skipping insertion in model container [2022-01-31 10:49:14,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:49:14" (4/4) ... [2022-01-31 10:49:14,407 INFO L111 eAbstractionObserver]: Analyzing ICFG break-2.iJordan [2022-01-31 10:49:14,411 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:49:14,411 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:49:14,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:49:14,447 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 10:49:14,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:49:14,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:49:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 10:49:14,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:14,474 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:14,474 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:14,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash -180469559, now seen corresponding path program 1 times [2022-01-31 10:49:14,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:14,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802253366] [2022-01-31 10:49:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:14,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:14,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:14,659 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 10:49:14,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802253366] [2022-01-31 10:49:14,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802253366] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:49:14,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:49:14,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:49:14,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443128989] [2022-01-31 10:49:14,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:49:14,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:49:14,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:49:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:49:14,690 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:14,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:14,729 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-01-31 10:49:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:49:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 10:49:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:14,735 INFO L225 Difference]: With dead ends: 37 [2022-01-31 10:49:14,735 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 10:49:14,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:49:14,739 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:14,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:49:14,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 10:49:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2022-01-31 10:49:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:49:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-01-31 10:49:14,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2022-01-31 10:49:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:14,762 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-01-31 10:49:14,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-01-31 10:49:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 10:49:14,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:14,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:14,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:49:14,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1562340776, now seen corresponding path program 1 times [2022-01-31 10:49:14,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960980815] [2022-01-31 10:49:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:14,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:14,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:14,802 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 10:49:14,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:14,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960980815] [2022-01-31 10:49:14,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960980815] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:49:14,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:49:14,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:49:14,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153273475] [2022-01-31 10:49:14,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:49:14,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:49:14,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:49:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:49:14,805 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:14,848 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 10:49:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:49:14,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 10:49:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:14,850 INFO L225 Difference]: With dead ends: 29 [2022-01-31 10:49:14,850 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 10:49:14,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:49:14,851 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:14,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:49:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 10:49:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-01-31 10:49:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:49:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 10:49:14,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-01-31 10:49:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:14,855 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 10:49:14,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 10:49:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 10:49:14,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:14,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:14,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:49:14,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2040920383, now seen corresponding path program 1 times [2022-01-31 10:49:14,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:14,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166367564] [2022-01-31 10:49:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:14,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:14,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:14,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166367564] [2022-01-31 10:49:14,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166367564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:49:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65178429] [2022-01-31 10:49:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:14,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:14,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:14,906 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 10:49:14,941 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 10:49:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 10:49:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:15,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:15,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65178429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:15,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:49:15,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 10:49:15,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316489312] [2022-01-31 10:49:15,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:15,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 10:49:15,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:15,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 10:49:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 10:49:15,059 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:15,128 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-01-31 10:49:15,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:49:15,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-01-31 10:49:15,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:15,129 INFO L225 Difference]: With dead ends: 44 [2022-01-31 10:49:15,129 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 10:49:15,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:49:15,130 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:15,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 40 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:49:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 10:49:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2022-01-31 10:49:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 4 states have call successors, (4), 3 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 10:49:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-01-31 10:49:15,134 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 17 [2022-01-31 10:49:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:15,135 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-01-31 10:49:15,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-01-31 10:49:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 10:49:15,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:15,136 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:15,155 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 10:49:15,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:15,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1039247048, now seen corresponding path program 1 times [2022-01-31 10:49:15,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:15,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355787439] [2022-01-31 10:49:15,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:15,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:15,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:15,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:15,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355787439] [2022-01-31 10:49:15,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355787439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:49:15,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363334293] [2022-01-31 10:49:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:15,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:15,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:15,406 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 10:49:15,407 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 10:49:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:49:15,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:15,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:15,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363334293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:15,532 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:49:15,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-31 10:49:15,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057034682] [2022-01-31 10:49:15,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:15,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 10:49:15,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:15,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 10:49:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 10:49:15,534 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:15,625 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-01-31 10:49:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:49:15,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 10:49:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:15,627 INFO L225 Difference]: With dead ends: 66 [2022-01-31 10:49:15,627 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 10:49:15,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:49:15,628 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:15,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 49 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:49:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 10:49:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 10:49:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:49:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-01-31 10:49:15,634 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 21 [2022-01-31 10:49:15,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:15,634 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-01-31 10:49:15,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-01-31 10:49:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 10:49:15,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:15,635 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:15,669 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 10:49:15,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 10:49:15,844 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1934041096, now seen corresponding path program 2 times [2022-01-31 10:49:15,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:15,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314787870] [2022-01-31 10:49:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:15,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:15,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:16,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:16,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314787870] [2022-01-31 10:49:16,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314787870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:49:16,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143420575] [2022-01-31 10:49:16,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:49:16,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:16,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:16,016 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 10:49:16,017 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 10:49:16,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:49:16,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:49:16,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:49:16,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:16,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:16,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143420575] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:16,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:49:16,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-31 10:49:16,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793223941] [2022-01-31 10:49:16,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:16,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:49:16,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:16,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:49:16,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:49:16,332 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:16,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:16,551 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-01-31 10:49:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:49:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 10:49:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:16,552 INFO L225 Difference]: With dead ends: 130 [2022-01-31 10:49:16,552 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 10:49:16,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:49:16,553 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:16,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 75 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:49:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 10:49:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-01-31 10:49:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 10:49:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2022-01-31 10:49:16,562 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 33 [2022-01-31 10:49:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:16,562 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2022-01-31 10:49:16,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2022-01-31 10:49:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 10:49:16,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:16,563 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:16,597 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 10:49:16,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:16,780 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2034339192, now seen corresponding path program 3 times [2022-01-31 10:49:16,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:16,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623304919] [2022-01-31 10:49:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:16,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:16,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:16,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623304919] [2022-01-31 10:49:16,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623304919] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:49:16,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012741560] [2022-01-31 10:49:16,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:49:16,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:16,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:16,987 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 10:49:16,995 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 10:49:17,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-31 10:49:17,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:49:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:49:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:17,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:17,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012741560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:17,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:49:17,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 10:49:17,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731772235] [2022-01-31 10:49:17,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:17,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 10:49:17,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:17,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 10:49:17,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 10:49:17,554 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 33 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:18,021 INFO L93 Difference]: Finished difference Result 258 states and 289 transitions. [2022-01-31 10:49:18,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 10:49:18,021 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 33 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 10:49:18,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:18,022 INFO L225 Difference]: With dead ends: 258 [2022-01-31 10:49:18,022 INFO L226 Difference]: Without dead ends: 258 [2022-01-31 10:49:18,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 10:49:18,023 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 369 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:18,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 96 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:49:18,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-01-31 10:49:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-01-31 10:49:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 32 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 10:49:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2022-01-31 10:49:18,037 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 57 [2022-01-31 10:49:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:18,037 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2022-01-31 10:49:18,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 33 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2022-01-31 10:49:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 10:49:18,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:18,039 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:18,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 10:49:18,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:18,240 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2006882184, now seen corresponding path program 4 times [2022-01-31 10:49:18,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:18,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994681746] [2022-01-31 10:49:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:18,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:18,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:18,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:18,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994681746] [2022-01-31 10:49:18,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994681746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:49:18,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677571678] [2022-01-31 10:49:18,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:49:18,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:18,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:18,701 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 10:49:18,702 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 10:49:18,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:49:18,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:49:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 10:49:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:49:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:18,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:19,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677571678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:19,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:49:19,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-01-31 10:49:19,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036433542] [2022-01-31 10:49:19,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:19,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 10:49:19,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:19,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 10:49:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 10:49:19,873 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 66 states, 66 states have (on average 3.015151515151515) internal successors, (199), 65 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:49:20,791 INFO L93 Difference]: Finished difference Result 514 states and 577 transitions. [2022-01-31 10:49:20,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 10:49:20,791 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.015151515151515) internal successors, (199), 65 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 10:49:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:49:20,793 INFO L225 Difference]: With dead ends: 514 [2022-01-31 10:49:20,793 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 10:49:20,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 10:49:20,795 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 596 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:49:20,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 186 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 10:49:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 10:49:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 513. [2022-01-31 10:49:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 446 states have (on average 1.006726457399103) internal successors, (449), 446 states have internal predecessors, (449), 64 states have call successors, (64), 3 states have call predecessors, (64), 2 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-31 10:49:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 576 transitions. [2022-01-31 10:49:20,812 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 576 transitions. Word has length 105 [2022-01-31 10:49:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:49:20,813 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 576 transitions. [2022-01-31 10:49:20,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.015151515151515) internal successors, (199), 65 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:49:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 576 transitions. [2022-01-31 10:49:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 10:49:20,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:49:20,818 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:49:20,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 10:49:21,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:21,032 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:49:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:49:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 148577912, now seen corresponding path program 5 times [2022-01-31 10:49:21,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:49:21,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277450579] [2022-01-31 10:49:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:49:21,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:49:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:22,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:49:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:49:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:49:22,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:49:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277450579] [2022-01-31 10:49:22,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277450579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:49:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61039272] [2022-01-31 10:49:22,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:49:22,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:49:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:49:22,567 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 10:49:22,596 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 10:51:29,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2022-01-31 10:51:29,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:51:29,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-31 10:51:29,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:51:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:51:30,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:51:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:51:34,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61039272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:51:34,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:51:34,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-01-31 10:51:34,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973634470] [2022-01-31 10:51:34,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:51:34,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 10:51:34,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:51:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 10:51:34,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 10:51:34,036 INFO L87 Difference]: Start difference. First operand 513 states and 576 transitions. Second operand has 130 states, 130 states have (on average 3.0076923076923077) internal successors, (391), 129 states have internal predecessors, (391), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:51:38,459 INFO L93 Difference]: Finished difference Result 1026 states and 1153 transitions. [2022-01-31 10:51:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 10:51:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.0076923076923077) internal successors, (391), 129 states have internal predecessors, (391), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 10:51:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:51:38,463 INFO L225 Difference]: With dead ends: 1026 [2022-01-31 10:51:38,463 INFO L226 Difference]: Without dead ends: 1026 [2022-01-31 10:51:38,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8388, Invalid=8642, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 10:51:38,467 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 2114 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 1415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2240 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 3217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1415 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:51:38,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2240 Valid, 318 Invalid, 3217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1415 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 10:51:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-01-31 10:51:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1025. [2022-01-31 10:51:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 894 states have (on average 1.0033557046979866) internal successors, (897), 894 states have internal predecessors, (897), 128 states have call successors, (128), 3 states have call predecessors, (128), 2 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-01-31 10:51:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1152 transitions. [2022-01-31 10:51:38,502 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1152 transitions. Word has length 201 [2022-01-31 10:51:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:51:38,502 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 1152 transitions. [2022-01-31 10:51:38,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.0076923076923077) internal successors, (391), 129 states have internal predecessors, (391), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:51:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1152 transitions. [2022-01-31 10:51:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-01-31 10:51:38,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:51:38,509 INFO L514 BasicCegarLoop]: trace histogram [127, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:51:38,555 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 10:51:38,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:38,724 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:51:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:51:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -491353480, now seen corresponding path program 6 times [2022-01-31 10:51:38,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:51:38,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867535602] [2022-01-31 10:51:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:51:38,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:51:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:43,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:51:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:51:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 23877 backedges. 0 proven. 23877 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:51:43,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:51:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867535602] [2022-01-31 10:51:43,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867535602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:51:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867835028] [2022-01-31 10:51:43,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:51:43,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:51:43,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:51:43,737 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:51:43,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process