/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/matrix-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 16:56:03,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 16:56:03,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 16:56:03,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 16:56:03,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 16:56:03,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 16:56:03,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 16:56:03,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 16:56:03,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 16:56:03,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 16:56:03,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 16:56:03,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 16:56:03,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 16:56:03,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 16:56:03,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 16:56:03,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 16:56:03,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 16:56:03,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 16:56:03,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 16:56:03,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 16:56:03,829 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 16:56:03,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 16:56:03,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 16:56:03,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 16:56:03,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 16:56:03,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 16:56:03,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 16:56:03,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 16:56:03,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 16:56:03,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 16:56:03,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 16:56:03,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 16:56:03,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 16:56:03,864 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 16:56:03,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 16:56:03,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 16:56:03,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 16:56:03,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 16:56:03,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 16:56:03,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 16:56:03,866 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 16:56:03,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 16:56:03,866 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 16:56:03,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 16:56:03,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 16:56:03,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 16:56:03,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 16:56:03,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 16:56:03,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 16:56:03,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 16:56:03,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 16:56:03,869 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 16:56:03,869 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 16:56:04,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 16:56:04,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 16:56:04,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 16:56:04,153 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 16:56:04,154 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 16:56:04,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/matrix-1.c [2022-03-18 16:56:04,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/288b5c059/ba08abd97cdc4fa9a195b3171f0e5515/FLAGe72cac89e [2022-03-18 16:56:04,572 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 16:56:04,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/matrix-1.c [2022-03-18 16:56:04,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/288b5c059/ba08abd97cdc4fa9a195b3171f0e5515/FLAGe72cac89e [2022-03-18 16:56:05,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/288b5c059/ba08abd97cdc4fa9a195b3171f0e5515 [2022-03-18 16:56:05,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 16:56:05,004 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 16:56:05,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 16:56:05,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 16:56:05,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 16:56:05,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77cd1696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05, skipping insertion in model container [2022-03-18 16:56:05,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 16:56:05,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 16:56:05,191 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/matrix-1.c[320,333] [2022-03-18 16:56:05,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 16:56:05,222 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 16:56:05,230 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/matrix-1.c[320,333] [2022-03-18 16:56:05,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 16:56:05,247 INFO L208 MainTranslator]: Completed translation [2022-03-18 16:56:05,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05 WrapperNode [2022-03-18 16:56:05,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 16:56:05,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 16:56:05,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 16:56:05,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 16:56:05,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 16:56:05,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 16:56:05,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 16:56:05,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 16:56:05,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 16:56:05,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:05,311 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) [2022-03-18 16:56:05,322 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 [2022-03-18 16:56:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 16:56:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 16:56:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 16:56:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 16:56:05,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 16:56:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 16:56:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 16:56:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 16:56:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 16:56:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 16:56:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 16:56:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 16:56:05,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 16:56:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 16:56:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 16:56:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 16:56:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 16:56:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 16:56:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 16:56:05,407 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 16:56:05,409 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 16:56:05,569 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 16:56:05,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 16:56:05,574 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 16:56:05,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:56:05 BoogieIcfgContainer [2022-03-18 16:56:05,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 16:56:05,576 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 16:56:05,576 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 16:56:05,577 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 16:56:05,580 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:56:05" (1/1) ... [2022-03-18 16:56:05,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 04:56:05 BasicIcfg [2022-03-18 16:56:05,597 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 16:56:05,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 16:56:05,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 16:56:05,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 16:56:05,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:56:05" (1/4) ... [2022-03-18 16:56:05,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d42458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:56:05, skipping insertion in model container [2022-03-18 16:56:05,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:56:05" (2/4) ... [2022-03-18 16:56:05,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d42458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:56:05, skipping insertion in model container [2022-03-18 16:56:05,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:56:05" (3/4) ... [2022-03-18 16:56:05,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d42458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 04:56:05, skipping insertion in model container [2022-03-18 16:56:05,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 04:56:05" (4/4) ... [2022-03-18 16:56:05,618 INFO L111 eAbstractionObserver]: Analyzing ICFG matrix-1.cJordan [2022-03-18 16:56:05,623 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 16:56:05,624 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 16:56:05,661 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 16:56:05,666 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 16:56:05,667 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 16:56:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:56:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 16:56:05,684 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:05,685 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:05,685 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1279400997, now seen corresponding path program 1 times [2022-03-18 16:56:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:05,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091040210] [2022-03-18 16:56:05,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:05,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:05,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:56:05,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875693248] [2022-03-18 16:56:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:05,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:05,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:05,794 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) [2022-03-18 16:56:05,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 16:56:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:05,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-18 16:56:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:56:05,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 16:56:05,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:56:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091040210] [2022-03-18 16:56:05,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 16:56:05,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875693248] [2022-03-18 16:56:05,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875693248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:56:05,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:56:05,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-18 16:56:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264060256] [2022-03-18 16:56:05,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:56:05,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-18 16:56:05,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:56:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-18 16:56:05,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-18 16:56:05,984 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 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) [2022-03-18 16:56:05,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:05,994 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-03-18 16:56:05,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-18 16:56:05,996 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 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 12 [2022-03-18 16:56:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:06,001 INFO L225 Difference]: With dead ends: 24 [2022-03-18 16:56:06,001 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 16:56:06,003 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-18 16:56:06,006 INFO L912 BasicCegarLoop]: 26 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, 26 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 [2022-03-18 16:56:06,007 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 16:56:06,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 16:56:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-18 16:56:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 16:56:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 16:56:06,030 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-03-18 16:56:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:06,031 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 16:56:06,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 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) [2022-03-18 16:56:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 16:56:06,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 16:56:06,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:06,032 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:06,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 16:56:06,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-18 16:56:06,237 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:06,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1308030148, now seen corresponding path program 1 times [2022-03-18 16:56:06,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:06,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691128071] [2022-03-18 16:56:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:06,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:06,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:56:06,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262757702] [2022-03-18 16:56:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:06,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:06,270 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) [2022-03-18 16:56:06,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 16:56:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 16:56:06,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:56:06,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 16:56:06,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:56:06,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691128071] [2022-03-18 16:56:06,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 16:56:06,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262757702] [2022-03-18 16:56:06,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262757702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:56:06,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:56:06,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 16:56:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635516300] [2022-03-18 16:56:06,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:56:06,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 16:56:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:56:06,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 16:56:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 16:56:06,387 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 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) [2022-03-18 16:56:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:06,407 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-18 16:56:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 16:56:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 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 12 [2022-03-18 16:56:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:06,408 INFO L225 Difference]: With dead ends: 22 [2022-03-18 16:56:06,409 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 16:56:06,409 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 16:56:06,410 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 16:56:06,410 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 16:56:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 16:56:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2022-03-18 16:56:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 16:56:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-18 16:56:06,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2022-03-18 16:56:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:06,415 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-18 16:56:06,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 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) [2022-03-18 16:56:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-18 16:56:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 16:56:06,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:06,416 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:06,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 16:56:06,628 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,SelfDestructingSolverStorable1 [2022-03-18 16:56:06,629 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1527308084, now seen corresponding path program 1 times [2022-03-18 16:56:06,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:06,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680892890] [2022-03-18 16:56:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:06,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:06,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:56:06,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102940741] [2022-03-18 16:56:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:06,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:06,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:06,658 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) [2022-03-18 16:56:06,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 16:56:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:06,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 16:56:06,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:56:06,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 16:56:06,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:56:06,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680892890] [2022-03-18 16:56:06,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 16:56:06,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102940741] [2022-03-18 16:56:06,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102940741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:56:06,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:56:06,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:56:06,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380285549] [2022-03-18 16:56:06,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:56:06,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:56:06,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:56:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:56:06,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:56:06,791 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 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) [2022-03-18 16:56:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:06,856 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-03-18 16:56:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 16:56:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 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 15 [2022-03-18 16:56:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:06,860 INFO L225 Difference]: With dead ends: 25 [2022-03-18 16:56:06,861 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 16:56:06,861 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:56:06,862 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 16:56:06,863 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 16:56:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 16:56:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-03-18 16:56:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 16:56:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-18 16:56:06,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-18 16:56:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:06,866 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-18 16:56:06,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 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) [2022-03-18 16:56:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-18 16:56:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 16:56:06,867 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:06,867 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:06,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 16:56:07,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:07,069 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash 990414767, now seen corresponding path program 1 times [2022-03-18 16:56:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:07,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005426285] [2022-03-18 16:56:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:07,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:07,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 16:56:07,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38993870] [2022-03-18 16:56:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:07,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:07,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:07,089 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) [2022-03-18 16:56:07,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 16:56:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:07,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 16:56:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:07,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 292 [2022-03-18 16:56:07,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-03-18 16:56:07,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-18 16:56:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:56:07,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:56:08,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 294 [2022-03-18 16:56:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:08,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-18 16:56:12,486 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 16:56:12,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 8 stores, 0 select indices, 0 select index equivalence classes, 14 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 294 treesize of output 2671