/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:50:14,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:50:14,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:50:15,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:50:15,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:50:15,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:50:15,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:50:15,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:50:15,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:50:15,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:50:15,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:50:15,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:50:15,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:50:15,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:50:15,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:50:15,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:50:15,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:50:15,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:50:15,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:50:15,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:50:15,022 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:50:15,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:50:15,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:50:15,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:50:15,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:50:15,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 19:50:15,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:50:15,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:50:15,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:50:15,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:50:15,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:50:15,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:50:15,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:50:15,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:50:15,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:50:15,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:50:15,049 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:50:15,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:50:15,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:50:15,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:50:15,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:50:15,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:50:15,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:50:15,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:50:15,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:50:15,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:50:15,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:50:15,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:50:15,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:50:15,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:50:15,051 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:50:15,052 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:50:15,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:50:15,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:50:15,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:50:15,246 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:50:15,247 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:50:15,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-03-17 19:50:15,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd86d6b09/151ad1820bd24197ba9fdc4e931c3728/FLAG9b0eaf574 [2022-03-17 19:50:15,651 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:50:15,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-03-17 19:50:15,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd86d6b09/151ad1820bd24197ba9fdc4e931c3728/FLAG9b0eaf574 [2022-03-17 19:50:15,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd86d6b09/151ad1820bd24197ba9fdc4e931c3728 [2022-03-17 19:50:15,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:50:15,669 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:50:15,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:50:15,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:50:15,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:50:15,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:50:15" (1/1) ... [2022-03-17 19:50:15,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3d8927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:15, skipping insertion in model container [2022-03-17 19:50:15,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:50:15" (1/1) ... [2022-03-17 19:50:15,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:50:15,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:50:15,930 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2022-03-17 19:50:15,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:50:15,949 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:50:16,006 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2022-03-17 19:50:16,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:50:16,029 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:50:16,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16 WrapperNode [2022-03-17 19:50:16,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:50:16,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:50:16,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:50:16,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:50:16,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:50:16,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:50:16,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:50:16,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:50:16,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:50:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:50:16,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 19:50:16,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 19:50:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:50:16,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:50:16,264 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:50:16,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:50:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:50:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:50:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:50:16,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:50:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-03-17 19:50:16,266 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:50:16,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:50:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:50:16,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-17 19:50:16,375 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:50:16,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:50:16,796 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:50:16,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:50:16,799 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-17 19:50:16,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:50:16 BoogieIcfgContainer [2022-03-17 19:50:16,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:50:16,805 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:50:16,805 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:50:16,807 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:50:16,809 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:50:16" (1/1) ... [2022-03-17 19:50:16,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:50:16 BasicIcfg [2022-03-17 19:50:16,823 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:50:16,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:50:16,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:50:16,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:50:16,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:50:15" (1/4) ... [2022-03-17 19:50:16,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e53827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:50:16, skipping insertion in model container [2022-03-17 19:50:16,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:50:16" (2/4) ... [2022-03-17 19:50:16,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e53827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:50:16, skipping insertion in model container [2022-03-17 19:50:16,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:50:16" (3/4) ... [2022-03-17 19:50:16,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e53827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:50:16, skipping insertion in model container [2022-03-17 19:50:16,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:50:16" (4/4) ... [2022-03-17 19:50:16,832 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.cqvasr [2022-03-17 19:50:16,835 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:50:16,835 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:50:16,861 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:50:16,871 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-17 19:50:16,871 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:50:16,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 19:50:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:50:16,894 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:16,894 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:16,894 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash 600195039, now seen corresponding path program 1 times [2022-03-17 19:50:16,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:16,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679313636] [2022-03-17 19:50:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:16,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:17,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679313636] [2022-03-17 19:50:17,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679313636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:50:17,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:50:17,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 19:50:17,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13765697] [2022-03-17 19:50:17,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:50:17,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 19:50:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:50:17,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 19:50:17,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:50:17,253 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:50:17,353 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-03-17 19:50:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:50:17,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 19:50:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:50:17,360 INFO L225 Difference]: With dead ends: 38 [2022-03-17 19:50:17,360 INFO L226 Difference]: Without dead ends: 24 [2022-03-17 19:50:17,362 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 19:50:17,364 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:50:17,365 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 55 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:50:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-17 19:50:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-03-17 19:50:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-17 19:50:17,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-03-17 19:50:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:50:17,386 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-17 19:50:17,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-17 19:50:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:50:17,387 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:17,387 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:17,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:50:17,388 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash 600224830, now seen corresponding path program 1 times [2022-03-17 19:50:17,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:17,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191702209] [2022-03-17 19:50:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:17,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:17,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:17,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191702209] [2022-03-17 19:50:17,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191702209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:50:17,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:50:17,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 19:50:17,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345597135] [2022-03-17 19:50:17,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:50:17,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 19:50:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:50:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 19:50:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 19:50:17,500 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:50:17,564 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-17 19:50:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 19:50:17,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-17 19:50:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:50:17,565 INFO L225 Difference]: With dead ends: 34 [2022-03-17 19:50:17,565 INFO L226 Difference]: Without dead ends: 24 [2022-03-17 19:50:17,565 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-17 19:50:17,566 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 19:50:17,566 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 19:50:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-17 19:50:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-03-17 19:50:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-17 19:50:17,569 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-03-17 19:50:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:50:17,569 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-17 19:50:17,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-17 19:50:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-17 19:50:17,570 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:17,570 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:17,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 19:50:17,570 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1638883516, now seen corresponding path program 1 times [2022-03-17 19:50:17,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:17,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386753659] [2022-03-17 19:50:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:17,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:17,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:17,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:17,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386753659] [2022-03-17 19:50:17,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386753659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:50:17,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309818600] [2022-03-17 19:50:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:17,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:50:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:50:17,667 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:50:17,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:50:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 19:50:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:50:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:17,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:50:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:18,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309818600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:50:18,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:50:18,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-17 19:50:18,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018044234] [2022-03-17 19:50:18,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:50:18,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 19:50:18,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:50:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 19:50:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-17 19:50:18,052 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:50:18,223 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-03-17 19:50:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 19:50:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-17 19:50:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:50:18,225 INFO L225 Difference]: With dead ends: 53 [2022-03-17 19:50:18,225 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 19:50:18,225 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-17 19:50:18,226 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:50:18,227 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 62 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:50:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 19:50:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-17 19:50:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-03-17 19:50:18,232 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 19 [2022-03-17 19:50:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:50:18,232 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-03-17 19:50:18,233 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-03-17 19:50:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 19:50:18,233 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:18,233 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:18,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 19:50:18,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:50:18,448 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash 989508950, now seen corresponding path program 2 times [2022-03-17 19:50:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536749289] [2022-03-17 19:50:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:18,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:18,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:18,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536749289] [2022-03-17 19:50:18,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536749289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:50:18,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237981825] [2022-03-17 19:50:18,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:50:18,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:50:18,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:50:18,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:50:18,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:50:18,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:50:18,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:50:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 19:50:18,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:50:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:18,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:50:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:19,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237981825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:50:19,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:50:19,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-17 19:50:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630045111] [2022-03-17 19:50:19,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:50:19,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 19:50:19,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:50:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 19:50:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-17 19:50:19,124 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:50:19,690 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-03-17 19:50:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 19:50:19,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-17 19:50:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:50:19,691 INFO L225 Difference]: With dead ends: 89 [2022-03-17 19:50:19,691 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 19:50:19,692 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-03-17 19:50:19,693 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:50:19,693 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 135 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:50:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 19:50:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-03-17 19:50:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-03-17 19:50:19,701 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 37 [2022-03-17 19:50:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:50:19,701 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-03-17 19:50:19,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:50:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-03-17 19:50:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-17 19:50:19,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:50:19,703 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:50:19,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 19:50:19,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 19:50:19,915 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:50:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:50:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1188421638, now seen corresponding path program 3 times [2022-03-17 19:50:19,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:50:19,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943597073] [2022-03-17 19:50:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:50:19,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:50:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:20,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:50:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:50:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:50:20,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:50:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943597073] [2022-03-17 19:50:20,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943597073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:50:20,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306070103] [2022-03-17 19:50:20,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 19:50:20,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:50:20,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:50:20,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:50:20,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:50:20,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 19:50:20,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:50:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 19:50:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:50:20,619 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-17 19:50:20,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23