/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/nla-digbench-scaling/egcd3-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:56:36,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:56:36,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:56:36,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:56:36,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:56:36,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:56:36,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:56:36,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:56:36,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:56:36,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:56:36,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:56:36,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:56:36,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:56:36,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:56:36,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:56:36,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:56:36,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:56:36,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:56:36,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:56:36,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:56:36,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:56:36,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:56:36,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:56:36,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:56:36,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 22:56:36,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:56:36,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:56:36,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:56:36,477 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:56:36,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:56:36,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:56:36,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:56:36,484 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:56:36,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:56:36,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:56:36,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:56:36,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:56:36,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:56:36,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:56:36,485 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:56:36,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:56:36,485 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:56:36,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:56:36,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:56:36,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:56:36,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:56:36,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:56:36,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:56:36,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:56:36,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:56:36,487 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:56:36,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:56:36,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:56:36,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:56:36,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:56:36,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:56:36,707 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:56:36,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2022-02-14 22:56:36,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d670ea641/d9e1c26db99247e292635988e39b05cd/FLAGaf570033c [2022-02-14 22:56:37,066 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:56:37,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c [2022-02-14 22:56:37,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d670ea641/d9e1c26db99247e292635988e39b05cd/FLAGaf570033c [2022-02-14 22:56:37,491 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d670ea641/d9e1c26db99247e292635988e39b05cd [2022-02-14 22:56:37,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:56:37,493 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:56:37,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:56:37,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:56:37,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:56:37,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ee715a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37, skipping insertion in model container [2022-02-14 22:56:37,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:56:37,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:56:37,646 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2022-02-14 22:56:37,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:56:37,678 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:56:37,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2022-02-14 22:56:37,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:56:37,710 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:56:37,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37 WrapperNode [2022-02-14 22:56:37,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:56:37,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:56:37,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:56:37,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:56:37,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:56:37,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:56:37,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:56:37,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:56:37,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:37,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:56:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:37,791 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) [2022-02-14 22:56:37,809 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 [2022-02-14 22:56:37,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:56:37,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:56:37,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:56:37,818 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:56:37,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:56:37,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:56:37,818 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:56:37,818 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:56:37,818 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:56:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:56:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 22:56:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:56:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:56:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:56:37,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:56:37,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:56:37,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:56:37,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:56:37,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:56:37,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:56:37,867 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:56:37,868 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:56:37,986 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:56:37,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:56:37,991 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-14 22:56:37,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:56:37 BoogieIcfgContainer [2022-02-14 22:56:37,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:56:37,992 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:56:37,992 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:56:37,993 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:56:37,995 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:56:37" (1/1) ... [2022-02-14 22:56:38,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:56:38 BasicIcfg [2022-02-14 22:56:38,006 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:56:38,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:56:38,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:56:38,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:56:38,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:56:37" (1/4) ... [2022-02-14 22:56:38,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65cbbf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:56:38, skipping insertion in model container [2022-02-14 22:56:38,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:56:37" (2/4) ... [2022-02-14 22:56:38,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65cbbf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:56:38, skipping insertion in model container [2022-02-14 22:56:38,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:56:37" (3/4) ... [2022-02-14 22:56:38,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65cbbf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:56:38, skipping insertion in model container [2022-02-14 22:56:38,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:56:38" (4/4) ... [2022-02-14 22:56:38,011 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.cJordan [2022-02-14 22:56:38,014 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:56:38,014 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:56:38,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:56:38,046 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 22:56:38,046 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:56:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 22:56:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-14 22:56:38,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:38,059 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:38,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-02-14 22:56:38,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:38,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374379681] [2022-02-14 22:56:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:38,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:56:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:38,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:56:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:38,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-14 22:56:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:38,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-14 22:56:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:38,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 22:56:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:56:38,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:38,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374379681] [2022-02-14 22:56:38,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374379681] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:56:38,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:56:38,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:56:38,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820175273] [2022-02-14 22:56:38,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:56:38,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:56:38,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:38,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:56:38,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:56:38,262 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:56:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:38,317 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-02-14 22:56:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:56:38,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-14 22:56:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:38,323 INFO L225 Difference]: With dead ends: 40 [2022-02-14 22:56:38,323 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 22:56:38,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:56:38,326 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:38,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:56:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 22:56:38,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-14 22:56:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:56:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-14 22:56:38,348 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-02-14 22:56:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:38,348 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-14 22:56:38,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:56:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-14 22:56:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 22:56:38,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:38,350 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:38,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:56:38,350 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:38,351 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-02-14 22:56:38,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:38,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786549654] [2022-02-14 22:56:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:38,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:38,367 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:38,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030201015] [2022-02-14 22:56:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:38,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:38,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:38,379 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) [2022-02-14 22:56:38,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:56:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:38,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:56:38,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 22:56:38,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:56:38,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:38,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786549654] [2022-02-14 22:56:38,586 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:38,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030201015] [2022-02-14 22:56:38,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030201015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:56:38,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:56:38,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 22:56:38,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151114417] [2022-02-14 22:56:38,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:56:38,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 22:56:38,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 22:56:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:56:38,589 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:56:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:38,661 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-02-14 22:56:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:56:38,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-14 22:56:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:38,662 INFO L225 Difference]: With dead ends: 47 [2022-02-14 22:56:38,663 INFO L226 Difference]: Without dead ends: 47 [2022-02-14 22:56:38,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:56:38,664 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:38,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:56:38,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-14 22:56:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-02-14 22:56:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 22:56:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-14 22:56:38,670 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-02-14 22:56:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:38,671 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-14 22:56:38,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:56:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-14 22:56:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-14 22:56:38,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:38,672 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:38,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 22:56:38,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:38,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:38,889 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-02-14 22:56:38,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:38,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950930463] [2022-02-14 22:56:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:38,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:38,910 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:38,910 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468986003] [2022-02-14 22:56:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:38,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:38,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:38,921 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) [2022-02-14 22:56:38,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:56:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 22:56:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:56:39,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:56:39,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:39,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950930463] [2022-02-14 22:56:39,392 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:39,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468986003] [2022-02-14 22:56:39,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468986003] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 22:56:39,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:56:39,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-02-14 22:56:39,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796338932] [2022-02-14 22:56:39,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:56:39,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:56:39,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:39,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:56:39,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:56:39,395 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:56:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:39,455 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-02-14 22:56:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 22:56:39,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-02-14 22:56:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:39,459 INFO L225 Difference]: With dead ends: 51 [2022-02-14 22:56:39,460 INFO L226 Difference]: Without dead ends: 51 [2022-02-14 22:56:39,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-14 22:56:39,462 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:39,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 189 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:56:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-14 22:56:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-14 22:56:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 22:56:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-14 22:56:39,472 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-02-14 22:56:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:39,472 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-14 22:56:39,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:56:39,472 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-14 22:56:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-14 22:56:39,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:39,473 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:39,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 22:56:39,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 22:56:39,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:39,675 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-02-14 22:56:39,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:39,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197260054] [2022-02-14 22:56:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:39,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:39,689 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:39,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649363111] [2022-02-14 22:56:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:39,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:39,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:39,691 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) [2022-02-14 22:56:39,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 22:56:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:39,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:56:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 22:56:39,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 22:56:39,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:39,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197260054] [2022-02-14 22:56:39,961 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:39,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649363111] [2022-02-14 22:56:39,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649363111] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:56:39,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:56:39,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-14 22:56:39,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988160364] [2022-02-14 22:56:39,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:39,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:56:39,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:56:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:56:39,964 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:56:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:40,092 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-02-14 22:56:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:56:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-02-14 22:56:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:40,094 INFO L225 Difference]: With dead ends: 96 [2022-02-14 22:56:40,094 INFO L226 Difference]: Without dead ends: 96 [2022-02-14 22:56:40,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:56:40,095 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:40,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:56:40,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-14 22:56:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-02-14 22:56:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 22:56:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-02-14 22:56:40,103 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-02-14 22:56:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:40,103 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-02-14 22:56:40,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 22:56:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-02-14 22:56:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-14 22:56:40,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:40,105 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:40,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:40,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:40,321 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:40,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-02-14 22:56:40,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:40,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805873560] [2022-02-14 22:56:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:40,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:40,333 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:40,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418833710] [2022-02-14 22:56:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:40,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:40,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:40,334 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) [2022-02-14 22:56:40,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 22:56:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:40,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 22:56:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-14 22:56:40,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:40,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:40,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805873560] [2022-02-14 22:56:40,638 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:40,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418833710] [2022-02-14 22:56:40,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418833710] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:56:40,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:56:40,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-14 22:56:40,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870494597] [2022-02-14 22:56:40,638 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:40,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:56:40,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:56:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:56:40,639 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 22:56:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:40,723 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-02-14 22:56:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:56:40,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-02-14 22:56:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:40,729 INFO L225 Difference]: With dead ends: 77 [2022-02-14 22:56:40,729 INFO L226 Difference]: Without dead ends: 77 [2022-02-14 22:56:40,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:56:40,730 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:40,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 245 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:56:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-14 22:56:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-02-14 22:56:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 22:56:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-02-14 22:56:40,743 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-02-14 22:56:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:40,744 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-02-14 22:56:40,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-14 22:56:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-02-14 22:56:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-14 22:56:40,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:40,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:40,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:40,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:40,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-02-14 22:56:40,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:40,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768393760] [2022-02-14 22:56:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:40,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:40,972 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:40,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713684903] [2022-02-14 22:56:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:40,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:40,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:41,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 22:56:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 22:56:41,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:56:41,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:56:41,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:41,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768393760] [2022-02-14 22:56:41,465 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:41,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713684903] [2022-02-14 22:56:41,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713684903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:56:41,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:56:41,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-02-14 22:56:41,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862987999] [2022-02-14 22:56:41,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:41,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 22:56:41,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 22:56:41,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-14 22:56:41,467 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:56:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:41,785 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-02-14 22:56:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 22:56:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-02-14 22:56:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:41,786 INFO L225 Difference]: With dead ends: 116 [2022-02-14 22:56:41,786 INFO L226 Difference]: Without dead ends: 116 [2022-02-14 22:56:41,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-02-14 22:56:41,787 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 90 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:41,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 373 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:56:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-14 22:56:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-02-14 22:56:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-14 22:56:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-02-14 22:56:41,794 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-02-14 22:56:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:41,795 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-02-14 22:56:41,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 22:56:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-02-14 22:56:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 22:56:41,796 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:41,796 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:41,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:42,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:42,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:42,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-02-14 22:56:42,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:42,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082873731] [2022-02-14 22:56:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:42,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:42,046 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:42,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139916010] [2022-02-14 22:56:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:42,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:42,053 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:42,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 22:56:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:42,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:56:42,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 22:56:42,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:56:42,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:42,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082873731] [2022-02-14 22:56:42,164 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:42,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139916010] [2022-02-14 22:56:42,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139916010] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:56:42,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:56:42,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:56:42,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754071184] [2022-02-14 22:56:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:56:42,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:56:42,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:56:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:56:42,165 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 22:56:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:42,206 INFO L93 Difference]: Finished difference Result 149 states and 211 transitions. [2022-02-14 22:56:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:56:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-02-14 22:56:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:42,208 INFO L225 Difference]: With dead ends: 149 [2022-02-14 22:56:42,208 INFO L226 Difference]: Without dead ends: 149 [2022-02-14 22:56:42,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:56:42,209 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:42,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:56:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-14 22:56:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-02-14 22:56:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-14 22:56:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-02-14 22:56:42,217 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-02-14 22:56:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:42,217 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-02-14 22:56:42,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 22:56:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-02-14 22:56:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 22:56:42,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:42,218 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:42,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:42,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:42,436 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-02-14 22:56:42,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:42,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928453198] [2022-02-14 22:56:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:42,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:42,445 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:42,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392423179] [2022-02-14 22:56:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:42,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:42,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:42,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:42,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 22:56:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-14 22:56:42,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:56:42,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:56:43,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:43,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928453198] [2022-02-14 22:56:43,029 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:43,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392423179] [2022-02-14 22:56:43,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392423179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:56:43,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:56:43,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2022-02-14 22:56:43,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948087347] [2022-02-14 22:56:43,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:43,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 22:56:43,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 22:56:43,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-02-14 22:56:43,031 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-14 22:56:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:45,393 INFO L93 Difference]: Finished difference Result 188 states and 263 transitions. [2022-02-14 22:56:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-14 22:56:45,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 47 [2022-02-14 22:56:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:45,395 INFO L225 Difference]: With dead ends: 188 [2022-02-14 22:56:45,395 INFO L226 Difference]: Without dead ends: 188 [2022-02-14 22:56:45,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=1012, Unknown=0, NotChecked=0, Total=1260 [2022-02-14 22:56:45,396 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 152 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:45,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 315 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-14 22:56:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-14 22:56:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-02-14 22:56:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-14 22:56:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-02-14 22:56:45,405 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-02-14 22:56:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:45,405 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-02-14 22:56:45,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-14 22:56:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-02-14 22:56:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 22:56:45,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:45,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:45,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:45,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:45,641 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-02-14 22:56:45,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:45,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561039641] [2022-02-14 22:56:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:45,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:45,649 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:45,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296450858] [2022-02-14 22:56:45,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:56:45,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:45,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:45,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 22:56:45,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:56:45,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:56:45,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 22:56:45,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 22:56:45,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:56:45,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:45,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561039641] [2022-02-14 22:56:45,754 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:45,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296450858] [2022-02-14 22:56:45,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296450858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:56:45,754 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:56:45,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:56:45,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618902946] [2022-02-14 22:56:45,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:56:45,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:56:45,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:56:45,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:56:45,757 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:56:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:45,813 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2022-02-14 22:56:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:56:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-02-14 22:56:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:45,815 INFO L225 Difference]: With dead ends: 144 [2022-02-14 22:56:45,815 INFO L226 Difference]: Without dead ends: 144 [2022-02-14 22:56:45,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:56:45,817 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:45,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:56:45,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-14 22:56:45,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-02-14 22:56:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-14 22:56:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-02-14 22:56:45,849 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-02-14 22:56:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:45,850 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-02-14 22:56:45,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-14 22:56:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-02-14 22:56:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-14 22:56:45,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:45,850 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:45,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:46,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-14 22:56:46,061 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:46,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-02-14 22:56:46,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:46,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317485038] [2022-02-14 22:56:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:46,094 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:46,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211434600] [2022-02-14 22:56:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:46,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:46,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:46,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:46,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 22:56:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:56:46,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 22:56:46,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:56:46,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:46,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317485038] [2022-02-14 22:56:46,221 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:46,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211434600] [2022-02-14 22:56:46,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211434600] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:56:46,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:56:46,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:56:46,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813314079] [2022-02-14 22:56:46,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:56:46,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:56:46,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:46,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:56:46,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:56:46,222 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-14 22:56:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:46,252 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2022-02-14 22:56:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:56:46,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-02-14 22:56:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:46,254 INFO L225 Difference]: With dead ends: 165 [2022-02-14 22:56:46,254 INFO L226 Difference]: Without dead ends: 165 [2022-02-14 22:56:46,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:56:46,255 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:46,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:56:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-14 22:56:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-02-14 22:56:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-14 22:56:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-02-14 22:56:46,260 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-02-14 22:56:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:46,261 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-02-14 22:56:46,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-14 22:56:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-02-14 22:56:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-14 22:56:46,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:46,261 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:46,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:46,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 22:56:46,481 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-02-14 22:56:46,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:46,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634362555] [2022-02-14 22:56:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:46,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:46,491 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:46,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734244823] [2022-02-14 22:56:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:46,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:46,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:46,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 22:56:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-14 22:56:46,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-02-14 22:56:46,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-02-14 22:56:47,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:47,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634362555] [2022-02-14 22:56:47,221 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:47,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734244823] [2022-02-14 22:56:47,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734244823] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:56:47,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:56:47,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-14 22:56:47,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686777728] [2022-02-14 22:56:47,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:47,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 22:56:47,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 22:56:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-02-14 22:56:47,222 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-14 22:56:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:50,120 INFO L93 Difference]: Finished difference Result 329 states and 485 transitions. [2022-02-14 22:56:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-14 22:56:50,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-02-14 22:56:50,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:50,123 INFO L225 Difference]: With dead ends: 329 [2022-02-14 22:56:50,123 INFO L226 Difference]: Without dead ends: 326 [2022-02-14 22:56:50,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 22:56:50,124 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 132 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:50,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 618 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-14 22:56:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-14 22:56:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-02-14 22:56:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-02-14 22:56:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-02-14 22:56:50,133 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-02-14 22:56:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:50,133 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-02-14 22:56:50,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-14 22:56:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-02-14 22:56:50,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-14 22:56:50,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:50,134 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:50,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:50,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 22:56:50,348 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:50,348 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-02-14 22:56:50,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:50,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483119417] [2022-02-14 22:56:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:50,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:50,367 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:50,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415033422] [2022-02-14 22:56:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:50,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:50,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:50,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:50,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 22:56:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 22:56:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-02-14 22:56:50,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-02-14 22:56:50,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:50,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483119417] [2022-02-14 22:56:50,952 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:50,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415033422] [2022-02-14 22:56:50,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415033422] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 22:56:50,952 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:56:50,952 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2022-02-14 22:56:50,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827091784] [2022-02-14 22:56:50,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:56:50,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 22:56:50,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:50,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 22:56:50,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:56:50,953 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-14 22:56:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:50,992 INFO L93 Difference]: Finished difference Result 254 states and 354 transitions. [2022-02-14 22:56:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:56:50,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2022-02-14 22:56:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:50,993 INFO L225 Difference]: With dead ends: 254 [2022-02-14 22:56:50,993 INFO L226 Difference]: Without dead ends: 254 [2022-02-14 22:56:50,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-14 22:56:50,994 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:50,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 175 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:56:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-14 22:56:51,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-02-14 22:56:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-02-14 22:56:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-02-14 22:56:51,001 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-02-14 22:56:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:51,001 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-02-14 22:56:51,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-02-14 22:56:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-02-14 22:56:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-14 22:56:51,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:51,002 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:51,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:51,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-14 22:56:51,215 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:51,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-02-14 22:56:51,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:51,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140363464] [2022-02-14 22:56:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:51,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:51,233 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:51,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869562419] [2022-02-14 22:56:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:51,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:51,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:51,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:51,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 22:56:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:51,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 22:56:51,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-14 22:56:51,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-14 22:56:51,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:51,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140363464] [2022-02-14 22:56:51,641 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:51,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869562419] [2022-02-14 22:56:51,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869562419] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:56:51,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:56:51,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-14 22:56:51,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508262021] [2022-02-14 22:56:51,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:51,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 22:56:51,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 22:56:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-14 22:56:51,643 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-14 22:56:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:56:51,903 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2022-02-14 22:56:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 22:56:51,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 72 [2022-02-14 22:56:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:56:51,905 INFO L225 Difference]: With dead ends: 244 [2022-02-14 22:56:51,905 INFO L226 Difference]: Without dead ends: 244 [2022-02-14 22:56:51,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-02-14 22:56:51,906 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 57 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:56:51,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 481 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:56:51,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-14 22:56:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2022-02-14 22:56:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 128 states have (on average 1.171875) internal successors, (150), 134 states have internal predecessors, (150), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-14 22:56:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 318 transitions. [2022-02-14 22:56:51,923 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 318 transitions. Word has length 72 [2022-02-14 22:56:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:56:51,923 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 318 transitions. [2022-02-14 22:56:51,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-02-14 22:56:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 318 transitions. [2022-02-14 22:56:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-14 22:56:51,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:56:51,924 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:56:51,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 22:56:52,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 22:56:52,138 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:56:52,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:56:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-02-14 22:56:52,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:56:52,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042069364] [2022-02-14 22:56:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:52,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:56:52,158 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:56:52,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957665342] [2022-02-14 22:56:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:56:52,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:56:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:56:52,171 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:56:52,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 22:56:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:56:52,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 75 conjunts are in the unsatisfiable core [2022-02-14 22:56:52,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:56:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-14 22:56:52,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:56:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-02-14 22:56:54,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:56:54,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042069364] [2022-02-14 22:56:54,084 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:56:54,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957665342] [2022-02-14 22:56:54,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957665342] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:56:54,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:56:54,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-02-14 22:56:54,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939458675] [2022-02-14 22:56:54,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:56:54,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-14 22:56:54,084 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:56:54,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-14 22:56:54,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-14 22:56:54,085 INFO L87 Difference]: Start difference. First operand 229 states and 318 transitions. Second operand has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-14 22:57:02,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:14,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:16,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:21,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:26,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:57:30,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:02,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 31.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:58:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:02,747 INFO L93 Difference]: Finished difference Result 422 states and 616 transitions. [2022-02-14 22:58:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-14 22:58:02,748 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-02-14 22:58:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:02,751 INFO L225 Difference]: With dead ends: 422 [2022-02-14 22:58:02,751 INFO L226 Difference]: Without dead ends: 419 [2022-02-14 22:58:02,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1140, Invalid=4560, Unknown=0, NotChecked=0, Total=5700 [2022-02-14 22:58:02,752 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 262 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 743 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:02,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 843 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 1684 Invalid, 3 Unknown, 0 Unchecked, 56.3s Time] [2022-02-14 22:58:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-02-14 22:58:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 351. [2022-02-14 22:58:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 191 states have (on average 1.1727748691099475) internal successors, (224), 200 states have internal predecessors, (224), 139 states have call successors, (139), 21 states have call predecessors, (139), 20 states have return successors, (137), 129 states have call predecessors, (137), 137 states have call successors, (137) [2022-02-14 22:58:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 500 transitions. [2022-02-14 22:58:02,764 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 500 transitions. Word has length 91 [2022-02-14 22:58:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:02,764 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 500 transitions. [2022-02-14 22:58:02,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-14 22:58:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 500 transitions. [2022-02-14 22:58:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-14 22:58:02,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:02,767 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:02,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:02,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 22:58:02,983 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:02,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:02,986 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-02-14 22:58:02,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:02,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861458581] [2022-02-14 22:58:02,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:02,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:02,992 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:02,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17464761] [2022-02-14 22:58:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:02,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:02,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:02,993 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:58:02,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 22:58:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:03,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 22:58:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-02-14 22:58:03,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-02-14 22:58:03,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:03,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861458581] [2022-02-14 22:58:03,606 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:03,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17464761] [2022-02-14 22:58:03,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17464761] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:03,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:03,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-02-14 22:58:03,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442262892] [2022-02-14 22:58:03,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:03,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 22:58:03,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 22:58:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-14 22:58:03,608 INFO L87 Difference]: Start difference. First operand 351 states and 500 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-02-14 22:58:04,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:04,006 INFO L93 Difference]: Finished difference Result 350 states and 485 transitions. [2022-02-14 22:58:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 22:58:04,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 94 [2022-02-14 22:58:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:04,007 INFO L225 Difference]: With dead ends: 350 [2022-02-14 22:58:04,007 INFO L226 Difference]: Without dead ends: 350 [2022-02-14 22:58:04,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2022-02-14 22:58:04,008 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:04,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 392 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:58:04,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-14 22:58:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 341. [2022-02-14 22:58:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 197 states have (on average 1.1776649746192893) internal successors, (232), 198 states have internal predecessors, (232), 123 states have call successors, (123), 21 states have call predecessors, (123), 20 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-02-14 22:58:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 476 transitions. [2022-02-14 22:58:04,019 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 476 transitions. Word has length 94 [2022-02-14 22:58:04,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:04,019 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 476 transitions. [2022-02-14 22:58:04,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 8 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2022-02-14 22:58:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 476 transitions. [2022-02-14 22:58:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-14 22:58:04,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:04,020 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:04,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:04,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:04,247 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-02-14 22:58:04,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:04,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452226800] [2022-02-14 22:58:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:04,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:04,257 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:04,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451022466] [2022-02-14 22:58:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:04,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:04,259 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:58:04,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-14 22:58:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:58:04,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 22:58:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 58 proven. 19 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-02-14 22:58:04,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-02-14 22:58:05,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:05,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452226800] [2022-02-14 22:58:05,092 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:05,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451022466] [2022-02-14 22:58:05,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451022466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:05,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:05,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-02-14 22:58:05,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536179811] [2022-02-14 22:58:05,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:05,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-14 22:58:05,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:05,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-14 22:58:05,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-02-14 22:58:05,094 INFO L87 Difference]: Start difference. First operand 341 states and 476 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-02-14 22:58:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:05,731 INFO L93 Difference]: Finished difference Result 321 states and 445 transitions. [2022-02-14 22:58:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-14 22:58:05,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 94 [2022-02-14 22:58:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:05,733 INFO L225 Difference]: With dead ends: 321 [2022-02-14 22:58:05,733 INFO L226 Difference]: Without dead ends: 303 [2022-02-14 22:58:05,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 22:58:05,734 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:05,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 406 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 278 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-02-14 22:58:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-14 22:58:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-02-14 22:58:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 171 states have internal predecessors, (198), 115 states have call successors, (115), 18 states have call predecessors, (115), 17 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-02-14 22:58:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 426 transitions. [2022-02-14 22:58:05,741 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 426 transitions. Word has length 94 [2022-02-14 22:58:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:05,741 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 426 transitions. [2022-02-14 22:58:05,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 19 states have internal predecessors, (51), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-02-14 22:58:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 426 transitions. [2022-02-14 22:58:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-14 22:58:05,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:05,742 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:05,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:05,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-14 22:58:05,959 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:05,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:05,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2002100640, now seen corresponding path program 2 times [2022-02-14 22:58:05,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:05,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963584586] [2022-02-14 22:58:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:05,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:05,965 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:05,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94379401] [2022-02-14 22:58:05,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:58:05,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:05,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:05,973 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:58:05,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-14 22:58:06,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:58:06,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:58:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 22:58:06,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-02-14 22:58:06,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:09,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:09,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963584586] [2022-02-14 22:58:09,509 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:09,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94379401] [2022-02-14 22:58:09,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94379401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:58:09,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:58:09,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-02-14 22:58:09,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722602296] [2022-02-14 22:58:09,510 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:09,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 22:58:09,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 22:58:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=353, Unknown=1, NotChecked=0, Total=420 [2022-02-14 22:58:09,511 INFO L87 Difference]: Start difference. First operand 303 states and 426 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-14 22:58:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:09,883 INFO L93 Difference]: Finished difference Result 383 states and 556 transitions. [2022-02-14 22:58:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 22:58:09,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-02-14 22:58:09,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:09,885 INFO L225 Difference]: With dead ends: 383 [2022-02-14 22:58:09,885 INFO L226 Difference]: Without dead ends: 383 [2022-02-14 22:58:09,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=207, Invalid=722, Unknown=1, NotChecked=0, Total=930 [2022-02-14 22:58:09,886 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 52 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:09,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 536 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:58:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-14 22:58:09,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 327. [2022-02-14 22:58:09,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 186 states have (on average 1.1612903225806452) internal successors, (216), 187 states have internal predecessors, (216), 123 states have call successors, (123), 18 states have call predecessors, (123), 17 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-02-14 22:58:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 460 transitions. [2022-02-14 22:58:09,893 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 460 transitions. Word has length 116 [2022-02-14 22:58:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:09,893 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 460 transitions. [2022-02-14 22:58:09,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-14 22:58:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 460 transitions. [2022-02-14 22:58:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-14 22:58:09,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:09,894 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:09,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:10,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-14 22:58:10,095 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1586140833, now seen corresponding path program 3 times [2022-02-14 22:58:10,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:10,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495997085] [2022-02-14 22:58:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:10,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:10,101 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:10,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731363257] [2022-02-14 22:58:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:58:10,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:10,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:10,103 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:58:10,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-14 22:58:10,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-14 22:58:10,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:58:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 22:58:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 72 proven. 36 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-02-14 22:58:11,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:12,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:12,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495997085] [2022-02-14 22:58:12,424 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:12,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731363257] [2022-02-14 22:58:12,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731363257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:58:12,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:58:12,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-02-14 22:58:12,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501162832] [2022-02-14 22:58:12,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:12,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 22:58:12,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:12,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 22:58:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-02-14 22:58:12,425 INFO L87 Difference]: Start difference. First operand 327 states and 460 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-14 22:58:13,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:13,760 INFO L93 Difference]: Finished difference Result 410 states and 575 transitions. [2022-02-14 22:58:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 22:58:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2022-02-14 22:58:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:13,763 INFO L225 Difference]: With dead ends: 410 [2022-02-14 22:58:13,763 INFO L226 Difference]: Without dead ends: 410 [2022-02-14 22:58:13,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 22:58:13,764 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 101 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:13,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 422 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-14 22:58:13,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-14 22:58:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 339. [2022-02-14 22:58:13,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 195 states have (on average 1.1538461538461537) internal successors, (225), 196 states have internal predecessors, (225), 123 states have call successors, (123), 21 states have call predecessors, (123), 20 states have return successors, (121), 121 states have call predecessors, (121), 121 states have call successors, (121) [2022-02-14 22:58:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 469 transitions. [2022-02-14 22:58:13,774 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 469 transitions. Word has length 121 [2022-02-14 22:58:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:13,774 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 469 transitions. [2022-02-14 22:58:13,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-14 22:58:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 469 transitions. [2022-02-14 22:58:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-14 22:58:13,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:13,775 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:13,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:13,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-14 22:58:13,988 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:13,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1478543105, now seen corresponding path program 4 times [2022-02-14 22:58:13,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:13,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028674285] [2022-02-14 22:58:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:13,997 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:13,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400293888] [2022-02-14 22:58:13,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 22:58:13,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:13,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:13,998 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:58:14,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-14 22:58:14,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 22:58:14,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:58:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:58:14,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 183 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-02-14 22:58:14,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 61 proven. 20 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-02-14 22:58:14,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:14,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028674285] [2022-02-14 22:58:14,564 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:14,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400293888] [2022-02-14 22:58:14,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400293888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:14,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:14,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-02-14 22:58:14,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687201938] [2022-02-14 22:58:14,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:14,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-14 22:58:14,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-14 22:58:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-02-14 22:58:14,566 INFO L87 Difference]: Start difference. First operand 339 states and 469 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-02-14 22:58:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:14,823 INFO L93 Difference]: Finished difference Result 263 states and 333 transitions. [2022-02-14 22:58:14,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 22:58:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 119 [2022-02-14 22:58:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:14,824 INFO L225 Difference]: With dead ends: 263 [2022-02-14 22:58:14,824 INFO L226 Difference]: Without dead ends: 229 [2022-02-14 22:58:14,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-02-14 22:58:14,825 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 49 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:14,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 458 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:58:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-02-14 22:58:14,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2022-02-14 22:58:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 136 states have (on average 1.0441176470588236) internal successors, (142), 137 states have internal predecessors, (142), 71 states have call successors, (71), 19 states have call predecessors, (71), 18 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-14 22:58:14,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 282 transitions. [2022-02-14 22:58:14,829 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 282 transitions. Word has length 119 [2022-02-14 22:58:14,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:14,829 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 282 transitions. [2022-02-14 22:58:14,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 8 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-02-14 22:58:14,830 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 282 transitions. [2022-02-14 22:58:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-14 22:58:14,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:14,830 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:14,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:15,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:15,040 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2145578717, now seen corresponding path program 5 times [2022-02-14 22:58:15,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:15,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763846397] [2022-02-14 22:58:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:15,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:15,054 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:15,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478505402] [2022-02-14 22:58:15,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 22:58:15,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:15,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:15,056 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:58:15,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-14 22:58:15,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-14 22:58:15,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:58:15,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 22:58:15,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 63 proven. 68 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-02-14 22:58:15,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 58 proven. 73 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-02-14 22:58:16,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:16,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763846397] [2022-02-14 22:58:16,500 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:16,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478505402] [2022-02-14 22:58:16,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478505402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:16,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:16,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2022-02-14 22:58:16,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028561694] [2022-02-14 22:58:16,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:16,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-14 22:58:16,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:16,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-14 22:58:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-14 22:58:16,503 INFO L87 Difference]: Start difference. First operand 226 states and 282 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2022-02-14 22:58:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:17,147 INFO L93 Difference]: Finished difference Result 161 states and 185 transitions. [2022-02-14 22:58:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 22:58:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) Word has length 146 [2022-02-14 22:58:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:17,148 INFO L225 Difference]: With dead ends: 161 [2022-02-14 22:58:17,148 INFO L226 Difference]: Without dead ends: 89 [2022-02-14 22:58:17,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2022-02-14 22:58:17,149 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 74 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:17,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 658 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 22:58:17,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-14 22:58:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-02-14 22:58:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 28 states have call successors, (28), 10 states have call predecessors, (28), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-02-14 22:58:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2022-02-14 22:58:17,151 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 146 [2022-02-14 22:58:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:17,151 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2022-02-14 22:58:17,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 29 states have internal predecessors, (85), 12 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2022-02-14 22:58:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2022-02-14 22:58:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-14 22:58:17,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:58:17,152 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:17,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-14 22:58:17,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:17,353 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:58:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:58:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash -586103770, now seen corresponding path program 6 times [2022-02-14 22:58:17,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:58:17,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096145974] [2022-02-14 22:58:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:58:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:58:17,359 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:58:17,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890378558] [2022-02-14 22:58:17,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 22:58:17,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:58:17,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:58:17,360 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:58:17,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-14 22:58:17,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-14 22:58:17,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:58:17,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 22:58:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:58:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2022-02-14 22:58:17,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:58:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 79 proven. 37 refuted. 0 times theorem prover too weak. 873 trivial. 0 not checked. [2022-02-14 22:58:18,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:58:18,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096145974] [2022-02-14 22:58:18,296 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:58:18,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890378558] [2022-02-14 22:58:18,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890378558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:58:18,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:58:18,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-02-14 22:58:18,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271069908] [2022-02-14 22:58:18,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:58:18,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-14 22:58:18,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:58:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-14 22:58:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-02-14 22:58:18,298 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2022-02-14 22:58:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:58:18,627 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-02-14 22:58:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 22:58:18,628 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 160 [2022-02-14 22:58:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:58:18,628 INFO L225 Difference]: With dead ends: 76 [2022-02-14 22:58:18,628 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 22:58:18,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-02-14 22:58:18,629 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 37 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:58:18,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 441 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:58:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 22:58:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 22:58:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-14 22:58:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 22:58:18,629 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2022-02-14 22:58:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:58:18,630 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 22:58:18,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2022-02-14 22:58:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 22:58:18,630 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 22:58:18,631 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 22:58:18,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-14 22:58:18,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-14 22:58:18,841 INFO L732 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:58:18,842 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 22:58:18,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:58:18 BasicIcfg [2022-02-14 22:58:18,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 22:58:18,844 INFO L158 Benchmark]: Toolchain (without parser) took 101350.97ms. Allocated memory was 213.9MB in the beginning and 358.6MB in the end (delta: 144.7MB). Free memory was 159.9MB in the beginning and 171.6MB in the end (delta: -11.6MB). Peak memory consumption was 133.9MB. Max. memory is 8.0GB. [2022-02-14 22:58:18,844 INFO L158 Benchmark]: CDTParser took 0.56ms. Allocated memory is still 213.9MB. Free memory is still 175.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 22:58:18,844 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.08ms. Allocated memory is still 213.9MB. Free memory was 159.7MB in the beginning and 185.1MB in the end (delta: -25.4MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-02-14 22:58:18,845 INFO L158 Benchmark]: Boogie Preprocessor took 32.55ms. Allocated memory is still 213.9MB. Free memory was 185.1MB in the beginning and 183.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 22:58:18,845 INFO L158 Benchmark]: RCFGBuilder took 245.48ms. Allocated memory is still 213.9MB. Free memory was 183.5MB in the beginning and 171.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 22:58:18,845 INFO L158 Benchmark]: IcfgTransformer took 13.81ms. Allocated memory is still 213.9MB. Free memory was 171.4MB in the beginning and 170.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 22:58:18,845 INFO L158 Benchmark]: TraceAbstraction took 100836.66ms. Allocated memory was 213.9MB in the beginning and 358.6MB in the end (delta: 144.7MB). Free memory was 169.9MB in the beginning and 171.6MB in the end (delta: -1.7MB). Peak memory consumption was 143.8MB. Max. memory is 8.0GB. [2022-02-14 22:58:18,846 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56ms. Allocated memory is still 213.9MB. Free memory is still 175.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 217.08ms. Allocated memory is still 213.9MB. Free memory was 159.7MB in the beginning and 185.1MB in the end (delta: -25.4MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.55ms. Allocated memory is still 213.9MB. Free memory was 185.1MB in the beginning and 183.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 245.48ms. Allocated memory is still 213.9MB. Free memory was 183.5MB in the beginning and 171.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.81ms. Allocated memory is still 213.9MB. Free memory was 171.4MB in the beginning and 170.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 100836.66ms. Allocated memory was 213.9MB in the beginning and 358.6MB in the end (delta: 144.7MB). Free memory was 169.9MB in the beginning and 171.6MB in the end (delta: -1.7MB). Peak memory consumption was 143.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 100.8s, OverallIterations: 21, TraceHistogramMax: 22, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 79.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 1408 SdHoareTripleChecker+Valid, 62.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1349 mSDsluCounter, 7538 SdHoareTripleChecker+Invalid, 61.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 44 IncrementalHoareTripleChecker+Unchecked, 6492 mSDsCounter, 1975 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6294 IncrementalHoareTripleChecker+Invalid, 8316 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1975 mSolverCounterUnsat, 1046 mSDtfsCounter, 6294 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2962 GetRequests, 2462 SyntacticMatches, 17 SemanticMatches, 483 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 21.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=351occurred in iteration=14, InterpolantAutomatonStates: 310, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 402 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 1571 NumberOfCodeBlocks, 1451 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 2616 ConstructedInterpolants, 2 QuantifiedInterpolants, 12487 SizeOfPredicates, 133 NumberOfNonLiveVariables, 3839 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 34 InterpolantComputations, 7 PerfectInterpolantSequences, 6397/6930 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 22:58:18,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...