/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:22:39,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:22:39,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:22:39,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 20:22:39,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:22:39,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:22:39,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:22:39,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:22:39,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:22:39,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:22:39,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:22:39,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:22:39,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:22:39,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:22:39,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:22:39,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:22:39,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 20:22:39,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:22:39,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:22:39,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:22:39,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 20:22:39,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:22:39,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:22:39,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:22:39,848 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:22:39,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:22:39,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:22:39,850 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:22:39,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:22:39,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:22:39,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:22:39,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:22:39,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:22:39,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:22:39,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:22:39,851 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:22:39,851 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:22:39,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:22:39,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:22:39,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:22:39,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:22:39,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:22:39,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:22:39,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:22:39,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:22:39,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:22:39,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:22:39,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:22:39,852 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:22:39,852 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:22:39,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:22:39,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:22:39,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:22:39,853 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:22:39,854 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:22:40,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:22:40,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:22:40,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:22:40,087 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:22:40,089 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:22:40,090 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2022-01-10 20:22:40,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf20c3e/7ba55e4ed2ae43bf868ae85edfb368e2/FLAGa0bbe40b2 [2022-01-10 20:22:40,571 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:22:40,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-2.c [2022-01-10 20:22:40,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf20c3e/7ba55e4ed2ae43bf868ae85edfb368e2/FLAGa0bbe40b2 [2022-01-10 20:22:40,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1bf20c3e/7ba55e4ed2ae43bf868ae85edfb368e2 [2022-01-10 20:22:40,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:22:40,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:22:40,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:22:40,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:22:40,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:22:40,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:22:40" (1/1) ... [2022-01-10 20:22:40,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41802b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:40, skipping insertion in model container [2022-01-10 20:22:40,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:22:40" (1/1) ... [2022-01-10 20:22:40,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:22:41,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:22:41,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-2.c[321,334] [2022-01-10 20:22:41,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:22:41,166 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:22:41,174 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested5-2.c[321,334] [2022-01-10 20:22:41,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:22:41,191 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:22:41,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41 WrapperNode [2022-01-10 20:22:41,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:22:41,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:22:41,193 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:22:41,193 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:22:41,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,221 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-01-10 20:22:41,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:22:41,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:22:41,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:22:41,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:22:41,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:22:41,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:22:41,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:22:41,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:22:41,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:22:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:22:41,271 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) [2022-01-10 20:22:41,273 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 [2022-01-10 20:22:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:22:41,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:22:41,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:22:41,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:22:41,351 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:22:41,352 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:22:41,472 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:22:41,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:22:41,478 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 20:22:41,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:41 BoogieIcfgContainer [2022-01-10 20:22:41,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:22:41,480 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:22:41,480 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:22:41,481 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:22:41,483 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:41" (1/1) ... [2022-01-10 20:22:41,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:22:41 BasicIcfg [2022-01-10 20:22:41,563 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:22:41,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:22:41,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:22:41,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:22:41,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:22:40" (1/4) ... [2022-01-10 20:22:41,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238cef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:22:41, skipping insertion in model container [2022-01-10 20:22:41,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:41" (2/4) ... [2022-01-10 20:22:41,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238cef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:22:41, skipping insertion in model container [2022-01-10 20:22:41,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:41" (3/4) ... [2022-01-10 20:22:41,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238cef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:22:41, skipping insertion in model container [2022-01-10 20:22:41,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:22:41" (4/4) ... [2022-01-10 20:22:41,577 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-2.cTransformedIcfg [2022-01-10 20:22:41,582 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:22:41,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 20:22:41,621 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:22:41,628 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-01-10 20:22:41,628 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 20:22:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 20:22:41,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:22:41,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:22:41,644 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:22:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:22:41,649 INFO L85 PathProgramCache]: Analyzing trace with hash -437933584, now seen corresponding path program 1 times [2022-01-10 20:22:41,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:22:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747474188] [2022-01-10 20:22:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:22:41,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:22:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:22:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:41,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:22:41,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747474188] [2022-01-10 20:22:41,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747474188] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:22:41,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:22:41,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 20:22:41,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255842421] [2022-01-10 20:22:41,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:22:41,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 20:22:41,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:22:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 20:22:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:22:41,909 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:22:41,932 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2022-01-10 20:22:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 20:22:41,934 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 20:22:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:22:41,941 INFO L225 Difference]: With dead ends: 40 [2022-01-10 20:22:41,941 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 20:22:41,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:22:41,952 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:22:41,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:22:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 20:22:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 20:22:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 20:22:41,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 20:22:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:22:41,988 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 20:22:41,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 20:22:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 20:22:41,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:22:41,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:22:41,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:22:41,991 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:22:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:22:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -437903793, now seen corresponding path program 1 times [2022-01-10 20:22:41,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:22:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567019207] [2022-01-10 20:22:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:22:41,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:22:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:22:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:42,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:22:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567019207] [2022-01-10 20:22:42,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567019207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:22:42,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:22:42,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:22:42,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33996946] [2022-01-10 20:22:42,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:22:42,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:22:42,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:22:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:22:42,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:22:42,109 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:22:42,139 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-01-10 20:22:42,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:22:42,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 20:22:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:22:42,141 INFO L225 Difference]: With dead ends: 41 [2022-01-10 20:22:42,141 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 20:22:42,145 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 [2022-01-10 20:22:42,146 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:22:42,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:22:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 20:22:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2022-01-10 20:22:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-10 20:22:42,155 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2022-01-10 20:22:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:22:42,156 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-10 20:22:42,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-10 20:22:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 20:22:42,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:22:42,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:22:42,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 20:22:42,161 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:22:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:22:42,166 INFO L85 PathProgramCache]: Analyzing trace with hash 110682993, now seen corresponding path program 1 times [2022-01-10 20:22:42,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:22:42,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853879283] [2022-01-10 20:22:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:22:42,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:22:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:22:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:42,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:22:42,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853879283] [2022-01-10 20:22:42,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853879283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:22:42,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126887440] [2022-01-10 20:22:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:22:42,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:22:42,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:22:42,254 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) [2022-01-10 20:22:42,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 20:22:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:22:42,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 20:22:42,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:22:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:42,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:22:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:42,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126887440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:22:42,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:22:42,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 20:22:42,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400863569] [2022-01-10 20:22:42,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:22:42,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 20:22:42,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:22:42,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 20:22:42,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 20:22:42,499 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:22:42,551 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-01-10 20:22:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 20:22:42,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 20:22:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:22:42,554 INFO L225 Difference]: With dead ends: 47 [2022-01-10 20:22:42,554 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 20:22:42,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 20:22:42,555 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:22:42,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 73 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:22:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 20:22:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-01-10 20:22:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-10 20:22:42,561 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2022-01-10 20:22:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:22:42,562 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-10 20:22:42,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-10 20:22:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 20:22:42,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:22:42,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:22:42,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 20:22:42,763 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 [2022-01-10 20:22:42,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:22:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:22:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1665847337, now seen corresponding path program 2 times [2022-01-10 20:22:42,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:22:42,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615756836] [2022-01-10 20:22:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:22:42,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:22:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:22:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:42,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:22:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615756836] [2022-01-10 20:22:42,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615756836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:22:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681299654] [2022-01-10 20:22:42,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:22:42,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:22:42,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:22:42,943 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) [2022-01-10 20:22:42,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 20:22:43,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:22:43,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:22:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 20:22:43,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:22:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:43,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:22:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:43,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681299654] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:22:43,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:22:43,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10] total 20 [2022-01-10 20:22:43,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710512517] [2022-01-10 20:22:43,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:22:43,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 20:22:43,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:22:43,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 20:22:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-01-10 20:22:43,964 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:22:44,866 INFO L93 Difference]: Finished difference Result 91 states and 117 transitions. [2022-01-10 20:22:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 20:22:44,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 20:22:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:22:44,868 INFO L225 Difference]: With dead ends: 91 [2022-01-10 20:22:44,868 INFO L226 Difference]: Without dead ends: 69 [2022-01-10 20:22:44,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 20:22:44,869 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 174 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 20:22:44,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 191 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 20:22:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-10 20:22:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 38. [2022-01-10 20:22:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-01-10 20:22:44,879 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 18 [2022-01-10 20:22:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:22:44,879 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-01-10 20:22:44,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:22:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-01-10 20:22:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 20:22:44,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:22:44,880 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:22:44,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 20:22:45,096 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 [2022-01-10 20:22:45,097 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:22:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:22:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash 173136709, now seen corresponding path program 3 times [2022-01-10 20:22:45,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:22:45,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647642874] [2022-01-10 20:22:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:22:45,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:22:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:22:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:45,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:22:45,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647642874] [2022-01-10 20:22:45,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647642874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:22:45,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375586947] [2022-01-10 20:22:45,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:22:45,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:22:45,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:22:45,375 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) [2022-01-10 20:22:45,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 20:22:45,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-10 20:22:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:22:45,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-10 20:22:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:22:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:45,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:22:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:22:48,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375586947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:22:48,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:22:48,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 24] total 47 [2022-01-10 20:22:48,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546476748] [2022-01-10 20:22:48,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:22:48,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-10 20:22:48,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:22:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-10 20:22:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=1526, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 20:22:48,935 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 47 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:23:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:23:07,115 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2022-01-10 20:23:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 20:23:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-10 20:23:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:23:07,117 INFO L225 Difference]: With dead ends: 113 [2022-01-10 20:23:07,117 INFO L226 Difference]: Without dead ends: 77 [2022-01-10 20:23:07,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1136, Invalid=2286, Unknown=0, NotChecked=0, Total=3422 [2022-01-10 20:23:07,119 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 401 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 20:23:07,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 285 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 20:23:07,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-10 20:23:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-01-10 20:23:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:23:07,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-01-10 20:23:07,132 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 32 [2022-01-10 20:23:07,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:23:07,132 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-01-10 20:23:07,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6595744680851063) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:23:07,133 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-01-10 20:23:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 20:23:07,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:23:07,134 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:23:07,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 20:23:07,355 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 [2022-01-10 20:23:07,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:23:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:23:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash 996710757, now seen corresponding path program 4 times [2022-01-10 20:23:07,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:23:07,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362715675] [2022-01-10 20:23:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:23:07,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:23:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:23:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:23:08,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:23:08,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362715675] [2022-01-10 20:23:08,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362715675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:23:08,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176552380] [2022-01-10 20:23:08,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 20:23:08,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:23:08,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:23:08,045 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) [2022-01-10 20:23:08,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 20:23:08,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 20:23:08,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:23:08,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 106 conjunts are in the unsatisfiable core [2022-01-10 20:23:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:23:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:23:09,204 INFO L328 TraceCheckSpWp]: Computing backward predicates...