/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/hard2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 23:26:38,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 23:26:38,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 23:26:38,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 23:26:38,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 23:26:38,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 23:26:38,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 23:26:38,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 23:26:38,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 23:26:38,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 23:26:38,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 23:26:38,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 23:26:38,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 23:26:38,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 23:26:38,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 23:26:38,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 23:26:38,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 23:26:38,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 23:26:38,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 23:26:38,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 23:26:38,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 23:26:38,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 23:26:38,802 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 23:26:38,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 23:26:38,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 23:26:38,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 23:26:38,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 23:26:38,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 23:26:38,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 23:26:38,832 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 23:26:38,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 23:26:38,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 23:26:38,834 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 23:26:38,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 23:26:38,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 23:26:38,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 23:26:38,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 23:26:38,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 23:26:38,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 23:26:38,835 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 23:26:38,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 23:26:38,836 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 23:26:38,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 23:26:38,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 23:26:38,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 23:26:38,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 23:26:38,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 23:26:38,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:26:38,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 23:26:38,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 23:26:38,837 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 23:26:38,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 23:26:39,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 23:26:39,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 23:26:39,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 23:26:39,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 23:26:39,047 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 23:26:39,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2022-02-14 23:26:39,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ac994094/4e6322e82341408a90f95799d75c87c5/FLAGc295acef8 [2022-02-14 23:26:39,444 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 23:26:39,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2022-02-14 23:26:39,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ac994094/4e6322e82341408a90f95799d75c87c5/FLAGc295acef8 [2022-02-14 23:26:39,878 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ac994094/4e6322e82341408a90f95799d75c87c5 [2022-02-14 23:26:39,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 23:26:39,881 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 23:26:39,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 23:26:39,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 23:26:39,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 23:26:39,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:26:39" (1/1) ... [2022-02-14 23:26:39,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2952fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:39, skipping insertion in model container [2022-02-14 23:26:39,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:26:39" (1/1) ... [2022-02-14 23:26:39,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 23:26:39,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 23:26:40,015 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/hard2_unwindbound10.c[526,539] [2022-02-14 23:26:40,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:26:40,031 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 23:26:40,038 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/hard2_unwindbound10.c[526,539] [2022-02-14 23:26:40,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:26:40,051 INFO L208 MainTranslator]: Completed translation [2022-02-14 23:26:40,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40 WrapperNode [2022-02-14 23:26:40,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 23:26:40,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 23:26:40,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 23:26:40,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 23:26:40,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 23:26:40,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 23:26:40,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 23:26:40,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 23:26:40,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:26:40,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:40,099 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 23:26:40,119 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 23:26:40,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 23:26:40,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 23:26:40,131 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 23:26:40,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 23:26:40,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 23:26:40,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 23:26:40,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 23:26:40,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 23:26:40,132 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 23:26:40,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 23:26:40,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 23:26:40,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 23:26:40,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 23:26:40,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 23:26:40,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 23:26:40,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 23:26:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 23:26:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 23:26:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 23:26:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 23:26:40,181 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 23:26:40,182 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 23:26:40,338 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 23:26:40,343 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 23:26:40,343 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 23:26:40,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:26:40 BoogieIcfgContainer [2022-02-14 23:26:40,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 23:26:40,345 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 23:26:40,345 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 23:26:40,373 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 23:26:40,375 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:26:40" (1/1) ... [2022-02-14 23:26:40,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:26:40 BasicIcfg [2022-02-14 23:26:40,408 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 23:26:40,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 23:26:40,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 23:26:40,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 23:26:40,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:26:39" (1/4) ... [2022-02-14 23:26:40,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782cfd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:26:40, skipping insertion in model container [2022-02-14 23:26:40,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:26:40" (2/4) ... [2022-02-14 23:26:40,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782cfd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:26:40, skipping insertion in model container [2022-02-14 23:26:40,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:26:40" (3/4) ... [2022-02-14 23:26:40,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782cfd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 11:26:40, skipping insertion in model container [2022-02-14 23:26:40,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:26:40" (4/4) ... [2022-02-14 23:26:40,422 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.cJordan [2022-02-14 23:26:40,426 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 23:26:40,426 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 23:26:40,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 23:26:40,489 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 23:26:40,489 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 23:26:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 23:26:40,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 23:26:40,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:40,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:40,517 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-02-14 23:26:40,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:40,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414491459] [2022-02-14 23:26:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:40,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:40,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:26:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:26:40,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:40,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414491459] [2022-02-14 23:26:40,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414491459] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:26:40,694 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:26:40,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 23:26:40,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826623063] [2022-02-14 23:26:40,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:40,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 23:26:40,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 23:26:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:26:40,722 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 23:26:40,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:40,798 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-02-14 23:26:40,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 23:26:40,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-14 23:26:40,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:40,807 INFO L225 Difference]: With dead ends: 32 [2022-02-14 23:26:40,807 INFO L226 Difference]: Without dead ends: 27 [2022-02-14 23:26:40,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:26:40,811 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:40,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:26:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-14 23:26:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-02-14 23:26:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 23:26:40,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-02-14 23:26:40,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-02-14 23:26:40,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:40,845 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-02-14 23:26:40,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 23:26:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-02-14 23:26:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 23:26:40,845 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:40,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:40,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 23:26:40,846 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-02-14 23:26:40,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:40,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217900561] [2022-02-14 23:26:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:40,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:26:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:26:40,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:40,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217900561] [2022-02-14 23:26:40,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217900561] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:26:40,908 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:26:40,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:26:40,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627032366] [2022-02-14 23:26:40,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:40,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:26:40,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:26:40,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:26:40,910 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 23:26:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:41,037 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-02-14 23:26:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:26:41,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-14 23:26:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:41,039 INFO L225 Difference]: With dead ends: 39 [2022-02-14 23:26:41,039 INFO L226 Difference]: Without dead ends: 39 [2022-02-14 23:26:41,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:26:41,045 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:41,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:26:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-14 23:26:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-02-14 23:26:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 23:26:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-02-14 23:26:41,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-02-14 23:26:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:41,060 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-02-14 23:26:41,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 23:26:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-02-14 23:26:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-14 23:26:41,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:41,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:41,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 23:26:41,069 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:41,070 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-02-14 23:26:41,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:41,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899517325] [2022-02-14 23:26:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:41,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:26:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:26:41,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:41,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899517325] [2022-02-14 23:26:41,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899517325] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:26:41,146 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:26:41,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 23:26:41,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843733449] [2022-02-14 23:26:41,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:41,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:26:41,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:41,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:26:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:26:41,148 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 23:26:41,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:41,207 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-02-14 23:26:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 23:26:41,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-14 23:26:41,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:41,210 INFO L225 Difference]: With dead ends: 32 [2022-02-14 23:26:41,210 INFO L226 Difference]: Without dead ends: 32 [2022-02-14 23:26:41,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:26:41,217 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:41,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:26:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-14 23:26:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-14 23:26:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 23:26:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-02-14 23:26:41,226 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-02-14 23:26:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:41,227 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-02-14 23:26:41,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 23:26:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-02-14 23:26:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 23:26:41,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:41,228 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:41,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 23:26:41,228 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:41,229 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-02-14 23:26:41,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:41,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621070009] [2022-02-14 23:26:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:41,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:41,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:26:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:41,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-14 23:26:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:26:41,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:41,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621070009] [2022-02-14 23:26:41,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621070009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:26:41,317 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:26:41,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:26:41,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953258444] [2022-02-14 23:26:41,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:41,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:26:41,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:41,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:26:41,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:26:41,319 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 23:26:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:41,430 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-02-14 23:26:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:26:41,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-02-14 23:26:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:41,432 INFO L225 Difference]: With dead ends: 44 [2022-02-14 23:26:41,432 INFO L226 Difference]: Without dead ends: 44 [2022-02-14 23:26:41,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:26:41,432 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:41,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:26:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-14 23:26:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-02-14 23:26:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 23:26:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-02-14 23:26:41,437 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-02-14 23:26:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:41,437 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-02-14 23:26:41,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 23:26:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-02-14 23:26:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 23:26:41,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:41,438 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:41,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 23:26:41,438 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:41,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:41,438 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-02-14 23:26:41,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:41,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73722834] [2022-02-14 23:26:41,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:41,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:41,448 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:41,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222876401] [2022-02-14 23:26:41,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:41,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:41,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:41,468 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 23:26:41,469 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 23:26:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 23:26:41,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 23:26:41,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:26:41,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:41,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73722834] [2022-02-14 23:26:41,665 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:41,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222876401] [2022-02-14 23:26:41,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222876401] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:26:41,666 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:26:41,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:26:41,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646440669] [2022-02-14 23:26:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:41,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:26:41,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:26:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:26:41,667 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 23:26:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:41,696 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-02-14 23:26:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:26:41,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-14 23:26:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:41,697 INFO L225 Difference]: With dead ends: 51 [2022-02-14 23:26:41,697 INFO L226 Difference]: Without dead ends: 50 [2022-02-14 23:26:41,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 23:26:41,698 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:41,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:26:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-14 23:26:41,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-14 23:26:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 23:26:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-14 23:26:41,702 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-02-14 23:26:41,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:41,702 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-14 23:26:41,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 23:26:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-14 23:26:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-14 23:26:41,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:41,703 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:41,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 23:26:41,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:41,916 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-02-14 23:26:41,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:41,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310814853] [2022-02-14 23:26:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:41,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:41,923 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:41,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293279672] [2022-02-14 23:26:41,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:41,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:41,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:41,925 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 23:26:41,955 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 23:26:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:26:41,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:26:42,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:26:42,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:42,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310814853] [2022-02-14 23:26:42,083 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:42,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293279672] [2022-02-14 23:26:42,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293279672] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:26:42,084 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:26:42,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:26:42,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022426359] [2022-02-14 23:26:42,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:42,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:26:42,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:42,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:26:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:26:42,085 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:26:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:42,113 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-02-14 23:26:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:26:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-14 23:26:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:42,115 INFO L225 Difference]: With dead ends: 63 [2022-02-14 23:26:42,115 INFO L226 Difference]: Without dead ends: 63 [2022-02-14 23:26:42,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:26:42,117 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:42,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:26:42,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-14 23:26:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-02-14 23:26:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 23:26:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-02-14 23:26:42,132 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-02-14 23:26:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:42,132 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-02-14 23:26:42,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:26:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-02-14 23:26:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-14 23:26:42,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:42,134 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:42,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 23:26:42,347 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,SelfDestructingSolverStorable5 [2022-02-14 23:26:42,348 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:42,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-02-14 23:26:42,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:42,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970613429] [2022-02-14 23:26:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:42,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:42,356 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:42,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137804732] [2022-02-14 23:26:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:42,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:42,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:42,357 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 23:26:42,358 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 23:26:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:26:42,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:26:42,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:26:42,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:42,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970613429] [2022-02-14 23:26:42,464 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:42,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137804732] [2022-02-14 23:26:42,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137804732] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:26:42,464 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:26:42,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:26:42,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139460606] [2022-02-14 23:26:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:42,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:26:42,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:42,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:26:42,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:26:42,465 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:26:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:42,496 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2022-02-14 23:26:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:26:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-02-14 23:26:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:42,497 INFO L225 Difference]: With dead ends: 74 [2022-02-14 23:26:42,497 INFO L226 Difference]: Without dead ends: 64 [2022-02-14 23:26:42,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 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 23:26:42,497 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:42,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:26:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-14 23:26:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-02-14 23:26:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 23:26:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-02-14 23:26:42,505 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-02-14 23:26:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:42,505 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-02-14 23:26:42,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:26:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-02-14 23:26:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-14 23:26:42,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:42,506 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2022-02-14 23:26:42,523 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 23:26:42,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:42,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-02-14 23:26:42,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:42,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518837438] [2022-02-14 23:26:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:42,718 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:42,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559942570] [2022-02-14 23:26:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:42,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:42,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:42,720 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 23:26:42,721 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 23:26:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:26:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-14 23:26:42,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:26:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-14 23:26:42,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:42,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518837438] [2022-02-14 23:26:42,907 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:42,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559942570] [2022-02-14 23:26:42,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559942570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:26:42,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:26:42,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 23:26:42,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45177427] [2022-02-14 23:26:42,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:26:42,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 23:26:42,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:42,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 23:26:42,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:26:42,909 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-02-14 23:26:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:42,977 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2022-02-14 23:26:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 23:26:42,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-02-14 23:26:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:42,979 INFO L225 Difference]: With dead ends: 119 [2022-02-14 23:26:42,979 INFO L226 Difference]: Without dead ends: 119 [2022-02-14 23:26:42,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:26:42,980 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:42,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 152 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:26:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-14 23:26:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-02-14 23:26:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-02-14 23:26:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-02-14 23:26:42,993 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-02-14 23:26:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:42,995 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-02-14 23:26:42,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-02-14 23:26:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-02-14 23:26:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-14 23:26:42,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:42,997 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:43,014 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 23:26:43,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:43,198 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-02-14 23:26:43,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:43,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849576081] [2022-02-14 23:26:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:43,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:43,205 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:43,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879165244] [2022-02-14 23:26:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:43,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:43,206 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 23:26:43,207 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 23:26:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:43,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 23:26:43,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 23:26:43,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:26:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-14 23:26:43,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:43,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849576081] [2022-02-14 23:26:43,468 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:43,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879165244] [2022-02-14 23:26:43,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879165244] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 23:26:43,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:26:43,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-14 23:26:43,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641353881] [2022-02-14 23:26:43,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:43,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:26:43,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:26:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-14 23:26:43,470 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:26:43,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:43,505 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2022-02-14 23:26:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:26:43,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-02-14 23:26:43,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:43,506 INFO L225 Difference]: With dead ends: 127 [2022-02-14 23:26:43,507 INFO L226 Difference]: Without dead ends: 125 [2022-02-14 23:26:43,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:26:43,507 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:43,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 113 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:26:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-14 23:26:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-02-14 23:26:43,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-02-14 23:26:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-02-14 23:26:43,513 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-02-14 23:26:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:43,513 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-02-14 23:26:43,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:26:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-02-14 23:26:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-14 23:26:43,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:43,514 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:43,534 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 23:26:43,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:43,725 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-02-14 23:26:43,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:43,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362688746] [2022-02-14 23:26:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:43,732 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:43,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752578789] [2022-02-14 23:26:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:43,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:43,733 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 23:26:43,734 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 23:26:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:43,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 23:26:43,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-14 23:26:43,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:26:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 23:26:44,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:44,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362688746] [2022-02-14 23:26:44,008 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:44,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752578789] [2022-02-14 23:26:44,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752578789] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:26:44,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:26:44,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-14 23:26:44,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144705312] [2022-02-14 23:26:44,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:26:44,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 23:26:44,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:44,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 23:26:44,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:26:44,011 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-14 23:26:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:44,115 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2022-02-14 23:26:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 23:26:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-02-14 23:26:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:44,117 INFO L225 Difference]: With dead ends: 224 [2022-02-14 23:26:44,117 INFO L226 Difference]: Without dead ends: 224 [2022-02-14 23:26:44,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-02-14 23:26:44,118 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 82 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:44,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 233 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:26:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-14 23:26:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-02-14 23:26:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-02-14 23:26:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-02-14 23:26:44,127 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-02-14 23:26:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:44,127 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-02-14 23:26:44,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-14 23:26:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-02-14 23:26:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-14 23:26:44,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:44,128 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-02-14 23:26:44,149 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 23:26:44,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:44,342 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:44,343 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-02-14 23:26:44,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:44,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595418677] [2022-02-14 23:26:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:44,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:44,349 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:44,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303747834] [2022-02-14 23:26:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:44,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:44,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:44,351 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 23:26:44,352 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 23:26:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-14 23:26:44,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 23:26:44,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:26:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 23:26:45,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:45,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595418677] [2022-02-14 23:26:45,564 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:45,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303747834] [2022-02-14 23:26:45,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303747834] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:26:45,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:26:45,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-14 23:26:45,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46316108] [2022-02-14 23:26:45,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:26:45,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 23:26:45,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:45,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 23:26:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:26:45,565 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-14 23:26:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:52,773 INFO L93 Difference]: Finished difference Result 310 states and 393 transitions. [2022-02-14 23:26:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 23:26:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-02-14 23:26:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:52,775 INFO L225 Difference]: With dead ends: 310 [2022-02-14 23:26:52,775 INFO L226 Difference]: Without dead ends: 303 [2022-02-14 23:26:52,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=50, Invalid=131, Unknown=1, NotChecked=0, Total=182 [2022-02-14 23:26:52,776 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 52 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:52,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 292 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-14 23:26:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-14 23:26:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-02-14 23:26:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-14 23:26:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-02-14 23:26:52,785 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-02-14 23:26:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:52,785 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-02-14 23:26:52,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-14 23:26:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-02-14 23:26:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-14 23:26:52,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:52,786 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 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] [2022-02-14 23:26:52,807 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 23:26:52,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:53,000 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-02-14 23:26:53,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:53,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715225480] [2022-02-14 23:26:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:53,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:53,011 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:53,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772962733] [2022-02-14 23:26:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:53,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:53,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:53,012 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 23:26:53,013 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 23:26:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-14 23:26:53,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-02-14 23:26:53,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:26:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-02-14 23:26:53,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:53,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715225480] [2022-02-14 23:26:53,656 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:53,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772962733] [2022-02-14 23:26:53,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772962733] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:26:53,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:26:53,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-02-14 23:26:53,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198454347] [2022-02-14 23:26:53,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:26:53,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 23:26:53,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:53,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 23:26:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-14 23:26:53,658 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-02-14 23:26:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:53,954 INFO L93 Difference]: Finished difference Result 266 states and 313 transitions. [2022-02-14 23:26:53,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 23:26:53,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-02-14 23:26:53,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:53,956 INFO L225 Difference]: With dead ends: 266 [2022-02-14 23:26:53,956 INFO L226 Difference]: Without dead ends: 239 [2022-02-14 23:26:53,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-02-14 23:26:53,956 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:53,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 243 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 23:26:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-14 23:26:53,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-02-14 23:26:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-14 23:26:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-02-14 23:26:53,963 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-02-14 23:26:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:53,963 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-02-14 23:26:53,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-02-14 23:26:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-02-14 23:26:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-14 23:26:53,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:53,964 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:53,984 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 23:26:54,165 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,SelfDestructingSolverStorable11 [2022-02-14 23:26:54,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:54,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-02-14 23:26:54,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:54,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812004777] [2022-02-14 23:26:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:54,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:54,173 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:54,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638402910] [2022-02-14 23:26:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:54,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:54,174 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 23:26:54,203 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 23:26:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:26:54,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 23:26:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-02-14 23:26:54,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:26:54,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:26:54,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812004777] [2022-02-14 23:26:54,392 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:26:54,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638402910] [2022-02-14 23:26:54,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638402910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:26:54,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:26:54,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:26:54,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937449760] [2022-02-14 23:26:54,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:26:54,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:26:54,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:26:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:26:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:26:54,393 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-14 23:26:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:26:54,429 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2022-02-14 23:26:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:26:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-02-14 23:26:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:26:54,431 INFO L225 Difference]: With dead ends: 222 [2022-02-14 23:26:54,431 INFO L226 Difference]: Without dead ends: 222 [2022-02-14 23:26:54,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:26:54,432 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 25 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:26:54,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 96 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:26:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-02-14 23:26:54,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-02-14 23:26:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-02-14 23:26:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-02-14 23:26:54,438 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-02-14 23:26:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:26:54,438 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-02-14 23:26:54,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-14 23:26:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-02-14 23:26:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-14 23:26:54,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:26:54,439 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:26:54,456 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 23:26:54,655 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,SelfDestructingSolverStorable12 [2022-02-14 23:26:54,655 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:26:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:26:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-02-14 23:26:54,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:26:54,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068308183] [2022-02-14 23:26:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:26:54,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:26:54,662 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:26:54,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549820863] [2022-02-14 23:26:54,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:26:54,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:26:54,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:26:54,664 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 23:26:54,666 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 23:26:54,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:26:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:26:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-02-14 23:26:54,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:26:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 23:26:55,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:27:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-14 23:27:09,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:27:09,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068308183] [2022-02-14 23:27:09,295 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:27:09,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549820863] [2022-02-14 23:27:09,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549820863] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:27:09,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:27:09,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-14 23:27:09,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453121778] [2022-02-14 23:27:09,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:27:09,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 23:27:09,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:27:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 23:27:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-14 23:27:09,297 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-02-14 23:27:21,633 WARN L228 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 23:27:25,080 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 23:27:32,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:27:34,816 WARN L534 Checker$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 23:27:37,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:27:42,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:27:44,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:27:46,624 WARN L534 Checker$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 23:27:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:27:47,097 INFO L93 Difference]: Finished difference Result 293 states and 379 transitions. [2022-02-14 23:27:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 23:27:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-02-14 23:27:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:27:47,099 INFO L225 Difference]: With dead ends: 293 [2022-02-14 23:27:47,099 INFO L226 Difference]: Without dead ends: 275 [2022-02-14 23:27:47,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=114, Invalid=305, Unknown=1, NotChecked=0, Total=420 [2022-02-14 23:27:47,100 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 125 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 193 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:27:47,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 659 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 525 Invalid, 5 Unknown, 0 Unchecked, 18.1s Time] [2022-02-14 23:27:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-14 23:27:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-02-14 23:27:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-14 23:27:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-02-14 23:27:47,112 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-02-14 23:27:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:27:47,112 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-02-14 23:27:47,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-02-14 23:27:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-02-14 23:27:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-14 23:27:47,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:27:47,113 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:27:47,142 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 23:27:47,314 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,SelfDestructingSolverStorable13 [2022-02-14 23:27:47,314 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:27:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:27:47,315 INFO L85 PathProgramCache]: Analyzing trace with hash -105290329, now seen corresponding path program 1 times [2022-02-14 23:27:47,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:27:47,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454004557] [2022-02-14 23:27:47,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:27:47,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:27:47,321 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:27:47,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772895937] [2022-02-14 23:27:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:27:47,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:27:47,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:27:47,327 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 23:27:47,328 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 23:27:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:27:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 23:27:47,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:27:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-02-14 23:27:47,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:27:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-02-14 23:27:47,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:27:47,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454004557] [2022-02-14 23:27:47,729 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:27:47,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772895937] [2022-02-14 23:27:47,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772895937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:27:47,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:27:47,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-14 23:27:47,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153508880] [2022-02-14 23:27:47,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:27:47,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 23:27:47,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:27:47,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 23:27:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-14 23:27:47,731 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-02-14 23:27:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:27:47,941 INFO L93 Difference]: Finished difference Result 661 states and 888 transitions. [2022-02-14 23:27:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-14 23:27:47,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-02-14 23:27:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:27:47,944 INFO L225 Difference]: With dead ends: 661 [2022-02-14 23:27:47,944 INFO L226 Difference]: Without dead ends: 659 [2022-02-14 23:27:47,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-14 23:27:47,945 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 148 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:27:47,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 400 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:27:47,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-14 23:27:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-02-14 23:27:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-02-14 23:27:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-02-14 23:27:47,960 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-02-14 23:27:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:27:47,960 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-02-14 23:27:47,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-02-14 23:27:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-02-14 23:27:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-14 23:27:47,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:27:47,961 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:27:47,981 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 23:27:48,174 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,SelfDestructingSolverStorable14 [2022-02-14 23:27:48,175 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:27:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:27:48,175 INFO L85 PathProgramCache]: Analyzing trace with hash 331614142, now seen corresponding path program 1 times [2022-02-14 23:27:48,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:27:48,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799718425] [2022-02-14 23:27:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:27:48,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:27:48,181 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:27:48,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64616288] [2022-02-14 23:27:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:27:48,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:27:48,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:27:48,182 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 23:27:48,183 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 23:27:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:27:48,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 23:27:48,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:27:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-02-14 23:27:48,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:27:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-02-14 23:27:48,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:27:48,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799718425] [2022-02-14 23:27:48,588 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:27:48,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64616288] [2022-02-14 23:27:48,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64616288] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:27:48,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:27:48,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-02-14 23:27:48,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195015139] [2022-02-14 23:27:48,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:27:48,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 23:27:48,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:27:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 23:27:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-14 23:27:48,590 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-02-14 23:27:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:27:48,828 INFO L93 Difference]: Finished difference Result 669 states and 858 transitions. [2022-02-14 23:27:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-14 23:27:48,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 108 [2022-02-14 23:27:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:27:48,831 INFO L225 Difference]: With dead ends: 669 [2022-02-14 23:27:48,831 INFO L226 Difference]: Without dead ends: 667 [2022-02-14 23:27:48,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-02-14 23:27:48,831 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 165 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:27:48,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 303 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 23:27:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-14 23:27:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 651. [2022-02-14 23:27:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 439 states have (on average 1.2277904328018223) internal successors, (539), 452 states have internal predecessors, (539), 155 states have call successors, (155), 58 states have call predecessors, (155), 56 states have return successors, (150), 140 states have call predecessors, (150), 150 states have call successors, (150) [2022-02-14 23:27:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 844 transitions. [2022-02-14 23:27:48,845 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 844 transitions. Word has length 108 [2022-02-14 23:27:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:27:48,846 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 844 transitions. [2022-02-14 23:27:48,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-02-14 23:27:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 844 transitions. [2022-02-14 23:27:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-14 23:27:48,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:27:48,847 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:27:48,864 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 23:27:49,064 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,SelfDestructingSolverStorable15 [2022-02-14 23:27:49,064 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:27:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:27:49,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1288142005, now seen corresponding path program 1 times [2022-02-14 23:27:49,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:27:49,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385309] [2022-02-14 23:27:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:27:49,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:27:49,070 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:27:49,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721983818] [2022-02-14 23:27:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:27:49,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:27:49,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:27:49,071 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 23:27:49,072 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 23:27:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:27:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-14 23:27:49,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:27:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 23:27:49,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:27:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-02-14 23:27:50,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:27:50,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385309] [2022-02-14 23:27:50,176 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:27:50,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721983818] [2022-02-14 23:27:50,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721983818] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:27:50,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:27:50,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-14 23:27:50,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593523443] [2022-02-14 23:27:50,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:27:50,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 23:27:50,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:27:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 23:27:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:27:50,177 INFO L87 Difference]: Start difference. First operand 651 states and 844 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-02-14 23:27:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:27:50,402 INFO L93 Difference]: Finished difference Result 655 states and 848 transitions. [2022-02-14 23:27:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:27:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 110 [2022-02-14 23:27:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:27:50,405 INFO L225 Difference]: With dead ends: 655 [2022-02-14 23:27:50,406 INFO L226 Difference]: Without dead ends: 651 [2022-02-14 23:27:50,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:27:50,406 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:27:50,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 350 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 23:27:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-02-14 23:27:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2022-02-14 23:27:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 439 states have (on average 1.2232346241457859) internal successors, (537), 452 states have internal predecessors, (537), 155 states have call successors, (155), 58 states have call predecessors, (155), 56 states have return successors, (150), 140 states have call predecessors, (150), 150 states have call successors, (150) [2022-02-14 23:27:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 842 transitions. [2022-02-14 23:27:50,419 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 842 transitions. Word has length 110 [2022-02-14 23:27:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:27:50,419 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 842 transitions. [2022-02-14 23:27:50,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-02-14 23:27:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 842 transitions. [2022-02-14 23:27:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-14 23:27:50,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:27:50,420 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:27:50,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-14 23:27:50,637 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,SelfDestructingSolverStorable16 [2022-02-14 23:27:50,638 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:27:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:27:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash 848408867, now seen corresponding path program 2 times [2022-02-14 23:27:50,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:27:50,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375385779] [2022-02-14 23:27:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:27:50,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:27:50,644 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:27:50,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455274874] [2022-02-14 23:27:50,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:27:50,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:27:50,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:27:50,646 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 23:27:50,647 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 23:27:50,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:27:50,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:27:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 23:27:50,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:27:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-02-14 23:27:50,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:27:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-02-14 23:27:51,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:27:51,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375385779] [2022-02-14 23:27:51,180 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:27:51,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455274874] [2022-02-14 23:27:51,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455274874] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:27:51,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:27:51,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-02-14 23:27:51,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990034155] [2022-02-14 23:27:51,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:27:51,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 23:27:51,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:27:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 23:27:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-14 23:27:51,183 INFO L87 Difference]: Start difference. First operand 651 states and 842 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-02-14 23:27:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:27:51,233 INFO L93 Difference]: Finished difference Result 573 states and 710 transitions. [2022-02-14 23:27:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:27:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2022-02-14 23:27:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:27:51,235 INFO L225 Difference]: With dead ends: 573 [2022-02-14 23:27:51,235 INFO L226 Difference]: Without dead ends: 533 [2022-02-14 23:27:51,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-14 23:27:51,235 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 5 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:27:51,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 149 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:27:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-02-14 23:27:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 531. [2022-02-14 23:27:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 356 states have (on average 1.1882022471910112) internal successors, (423), 369 states have internal predecessors, (423), 121 states have call successors, (121), 55 states have call predecessors, (121), 53 states have return successors, (116), 106 states have call predecessors, (116), 116 states have call successors, (116) [2022-02-14 23:27:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 660 transitions. [2022-02-14 23:27:51,247 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 660 transitions. Word has length 124 [2022-02-14 23:27:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:27:51,248 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 660 transitions. [2022-02-14 23:27:51,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-02-14 23:27:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 660 transitions. [2022-02-14 23:27:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-14 23:27:51,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:27:51,249 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:27:51,269 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 23:27:51,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:27:51,463 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:27:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:27:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 722879610, now seen corresponding path program 3 times [2022-02-14 23:27:51,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:27:51,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597693704] [2022-02-14 23:27:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:27:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:27:51,471 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:27:51,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600039320] [2022-02-14 23:27:51,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 23:27:51,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:27:51,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:27:51,473 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 23:27:51,475 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 23:27:51,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 23:27:51,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:27:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-14 23:27:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:27:51,810 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:27:51,895 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:27:52,050 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-14 23:27:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-02-14 23:27:52,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:28:06,323 WARN L860 $PredicateComparison]: unable to prove that (or (= c_main_~p~0 1) (let ((.cse9 (* c_main_~p~0 c_main_~B~0))) (let ((.cse4 (= (mod .cse9 2) 0)) (.cse10 (< .cse9 0))) (let ((.cse6 (= (mod c_main_~p~0 2) 0)) (.cse3 (not .cse10)) (.cse0 (and .cse10 (not .cse4))) (.cse1 (* (- 1) (div .cse9 2))) (.cse5 (div c_main_~p~0 2)) (.cse7 (< c_main_~p~0 0))) (and (or (let ((.cse2 (* (+ c_main_~q~0 .cse5) c_main_~B~0))) (and (or .cse0 (= (+ .cse1 c_main_~r~0 .cse2) c_main_~A~0)) (or .cse3 (= c_main_~A~0 (+ (- 1) .cse1 c_main_~r~0 .cse2)) .cse4))) (and (not .cse6) .cse7)) (or .cse6 (let ((.cse8 (* (+ c_main_~q~0 .cse5 1) c_main_~B~0))) (and (or .cse3 .cse4 (= c_main_~A~0 (+ (- 1) .cse1 .cse8 c_main_~r~0))) (or .cse0 (= c_main_~A~0 (+ .cse1 .cse8 c_main_~r~0))))) (not .cse7))))))) is different from true [2022-02-14 23:31:48,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:31:48,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597693704] [2022-02-14 23:31:48,068 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:31:48,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600039320] [2022-02-14 23:31:48,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600039320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 23:31:48,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:31:48,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-14 23:31:48,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083378650] [2022-02-14 23:31:48,069 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 23:31:48,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 23:31:48,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:31:48,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 23:31:48,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2022-02-14 23:31:48,070 INFO L87 Difference]: Start difference. First operand 531 states and 660 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 23:31:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:31:48,150 INFO L93 Difference]: Finished difference Result 543 states and 669 transitions. [2022-02-14 23:31:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:31:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2022-02-14 23:31:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:31:48,152 INFO L225 Difference]: With dead ends: 543 [2022-02-14 23:31:48,152 INFO L226 Difference]: Without dead ends: 539 [2022-02-14 23:31:48,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=60, Invalid=215, Unknown=1, NotChecked=30, Total=306 [2022-02-14 23:31:48,153 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:31:48,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 102 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:31:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-02-14 23:31:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 441. [2022-02-14 23:31:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 298 states have (on average 1.157718120805369) internal successors, (345), 300 states have internal predecessors, (345), 93 states have call successors, (93), 51 states have call predecessors, (93), 49 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-02-14 23:31:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 528 transitions. [2022-02-14 23:31:48,162 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 528 transitions. Word has length 126 [2022-02-14 23:31:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:31:48,164 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 528 transitions. [2022-02-14 23:31:48,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-14 23:31:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 528 transitions. [2022-02-14 23:31:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-14 23:31:48,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:31:48,165 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:31:48,184 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 23:31:48,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:31:48,375 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:31:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:31:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1722143882, now seen corresponding path program 3 times [2022-02-14 23:31:48,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:31:48,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977936128] [2022-02-14 23:31:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:31:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:31:48,381 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:31:48,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164243852] [2022-02-14 23:31:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 23:31:48,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:31:48,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:31:48,388 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 23:31:48,390 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 23:31:48,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 23:31:48,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:31:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 23:31:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:31:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-02-14 23:31:48,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:31:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-02-14 23:31:48,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:31:48,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977936128] [2022-02-14 23:31:48,782 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:31:48,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164243852] [2022-02-14 23:31:48,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164243852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:31:48,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:31:48,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-02-14 23:31:48,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214540756] [2022-02-14 23:31:48,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:31:48,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 23:31:48,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:31:48,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 23:31:48,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:31:48,784 INFO L87 Difference]: Start difference. First operand 441 states and 528 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-14 23:31:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:31:48,876 INFO L93 Difference]: Finished difference Result 483 states and 560 transitions. [2022-02-14 23:31:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:31:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-02-14 23:31:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:31:48,878 INFO L225 Difference]: With dead ends: 483 [2022-02-14 23:31:48,879 INFO L226 Difference]: Without dead ends: 469 [2022-02-14 23:31:48,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-14 23:31:48,879 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:31:48,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 149 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:31:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-02-14 23:31:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 357. [2022-02-14 23:31:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 240 states have (on average 1.0958333333333334) internal successors, (263), 247 states have internal predecessors, (263), 67 states have call successors, (67), 50 states have call predecessors, (67), 49 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2022-02-14 23:31:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 395 transitions. [2022-02-14 23:31:48,886 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 395 transitions. Word has length 128 [2022-02-14 23:31:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:31:48,886 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 395 transitions. [2022-02-14 23:31:48,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-14 23:31:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 395 transitions. [2022-02-14 23:31:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-14 23:31:48,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:31:48,888 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:31:48,908 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 23:31:49,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:31:49,103 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:31:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:31:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1538719799, now seen corresponding path program 2 times [2022-02-14 23:31:49,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:31:49,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644795915] [2022-02-14 23:31:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:31:49,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:31:49,110 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:31:49,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986628833] [2022-02-14 23:31:49,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 23:31:49,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:31:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:31:49,112 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 23:31:49,113 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 23:31:49,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 23:31:49,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:31:49,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 23:31:49,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:31:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 417 proven. 69 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-02-14 23:31:49,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:31:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 105 proven. 69 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2022-02-14 23:31:49,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:31:49,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644795915] [2022-02-14 23:31:49,775 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:31:49,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986628833] [2022-02-14 23:31:49,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986628833] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:31:49,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:31:49,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-02-14 23:31:49,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985620119] [2022-02-14 23:31:49,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:31:49,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 23:31:49,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:31:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 23:31:49,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-14 23:31:49,777 INFO L87 Difference]: Start difference. First operand 357 states and 395 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-02-14 23:31:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:31:49,866 INFO L93 Difference]: Finished difference Result 381 states and 428 transitions. [2022-02-14 23:31:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 23:31:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 168 [2022-02-14 23:31:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:31:49,867 INFO L225 Difference]: With dead ends: 381 [2022-02-14 23:31:49,867 INFO L226 Difference]: Without dead ends: 329 [2022-02-14 23:31:49,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 326 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-14 23:31:49,868 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:31:49,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 413 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:31:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-02-14 23:31:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-02-14 23:31:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 221 states have (on average 1.090497737556561) internal successors, (241), 227 states have internal predecessors, (241), 61 states have call successors, (61), 47 states have call predecessors, (61), 46 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-02-14 23:31:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 361 transitions. [2022-02-14 23:31:49,874 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 361 transitions. Word has length 168 [2022-02-14 23:31:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:31:49,874 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 361 transitions. [2022-02-14 23:31:49,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-02-14 23:31:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 361 transitions. [2022-02-14 23:31:49,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-02-14 23:31:49,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:31:49,875 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:31:49,895 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 23:31:50,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:31:50,092 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:31:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:31:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash 885039068, now seen corresponding path program 3 times [2022-02-14 23:31:50,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:31:50,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988885360] [2022-02-14 23:31:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:31:50,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:31:50,101 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:31:50,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464186232] [2022-02-14 23:31:50,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 23:31:50,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:31:50,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:31:50,102 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 23:31:50,103 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 23:31:50,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-14 23:31:50,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 23:31:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-14 23:31:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:31:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 130 proven. 122 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-02-14 23:31:50,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:32:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 136 proven. 116 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-02-14 23:32:30,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:32:30,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988885360] [2022-02-14 23:32:30,141 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:32:30,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464186232] [2022-02-14 23:32:30,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464186232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:32:30,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:32:30,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2022-02-14 23:32:30,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117355884] [2022-02-14 23:32:30,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:32:30,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-14 23:32:30,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:32:30,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-14 23:32:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-02-14 23:32:30,142 INFO L87 Difference]: Start difference. First operand 329 states and 361 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) [2022-02-14 23:32:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:32:30,767 INFO L93 Difference]: Finished difference Result 365 states and 412 transitions. [2022-02-14 23:32:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 23:32:30,771 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) Word has length 172 [2022-02-14 23:32:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:32:30,772 INFO L225 Difference]: With dead ends: 365 [2022-02-14 23:32:30,772 INFO L226 Difference]: Without dead ends: 301 [2022-02-14 23:32:30,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 321 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-14 23:32:30,773 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 39 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 23:32:30,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 421 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 23:32:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-14 23:32:30,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-02-14 23:32:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 202 states have (on average 1.0841584158415842) internal successors, (219), 207 states have internal predecessors, (219), 55 states have call successors, (55), 44 states have call predecessors, (55), 43 states have return successors, (53), 49 states have call predecessors, (53), 53 states have call successors, (53) [2022-02-14 23:32:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 327 transitions. [2022-02-14 23:32:30,778 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 327 transitions. Word has length 172 [2022-02-14 23:32:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:32:30,778 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 327 transitions. [2022-02-14 23:32:30,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) [2022-02-14 23:32:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 327 transitions. [2022-02-14 23:32:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-02-14 23:32:30,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:32:30,782 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:32:30,802 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 23:32:30,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:32:31,000 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:32:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:32:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash 87753903, now seen corresponding path program 4 times [2022-02-14 23:32:31,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:32:31,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828469100] [2022-02-14 23:32:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:32:31,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:32:31,006 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:32:31,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186489880] [2022-02-14 23:32:31,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 23:32:31,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:32:31,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:32:31,008 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 23:32:31,011 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 23:32:31,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 23:32:31,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-02-14 23:32:31,104 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-14 23:32:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-14 23:32:31,186 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-14 23:32:31,186 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-14 23:32:31,187 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 23:32:31,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-14 23:32:31,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:32:31,406 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:32:31,408 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 23:32:31,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 11:32:31 BasicIcfg [2022-02-14 23:32:31,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 23:32:31,458 INFO L158 Benchmark]: Toolchain (without parser) took 351577.15ms. Allocated memory was 185.6MB in the beginning and 312.5MB in the end (delta: 126.9MB). Free memory was 138.6MB in the beginning and 191.4MB in the end (delta: -52.8MB). Peak memory consumption was 74.6MB. Max. memory is 8.0GB. [2022-02-14 23:32:31,458 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 185.6MB. Free memory was 154.9MB in the beginning and 154.9MB in the end (delta: 80.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 23:32:31,459 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.96ms. Allocated memory is still 185.6MB. Free memory was 138.4MB in the beginning and 164.4MB in the end (delta: -26.0MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-02-14 23:32:31,459 INFO L158 Benchmark]: Boogie Preprocessor took 19.72ms. Allocated memory is still 185.6MB. Free memory was 163.9MB in the beginning and 162.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 23:32:31,459 INFO L158 Benchmark]: RCFGBuilder took 271.10ms. Allocated memory is still 185.6MB. Free memory was 162.9MB in the beginning and 151.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 23:32:31,459 INFO L158 Benchmark]: IcfgTransformer took 62.75ms. Allocated memory is still 185.6MB. Free memory was 151.3MB in the beginning and 149.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 23:32:31,459 INFO L158 Benchmark]: TraceAbstraction took 351049.20ms. Allocated memory was 185.6MB in the beginning and 312.5MB in the end (delta: 126.9MB). Free memory was 149.2MB in the beginning and 191.4MB in the end (delta: -42.2MB). Peak memory consumption was 85.7MB. Max. memory is 8.0GB. [2022-02-14 23:32:31,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 185.6MB. Free memory was 154.9MB in the beginning and 154.9MB in the end (delta: 80.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 168.96ms. Allocated memory is still 185.6MB. Free memory was 138.4MB in the beginning and 164.4MB in the end (delta: -26.0MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.72ms. Allocated memory is still 185.6MB. Free memory was 163.9MB in the beginning and 162.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 271.10ms. Allocated memory is still 185.6MB. Free memory was 162.9MB in the beginning and 151.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 62.75ms. Allocated memory is still 185.6MB. Free memory was 151.3MB in the beginning and 149.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 351049.20ms. Allocated memory was 185.6MB in the beginning and 312.5MB in the end (delta: 126.9MB). Free memory was 149.2MB in the beginning and 191.4MB in the end (delta: -42.2MB). Peak memory consumption was 85.7MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=31, B=1, counter=0, d=1, p=1, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=1, d=2, p=2, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=2, d=4, p=4, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=3, d=8, p=8, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=4, d=16, p=16, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=5, counter++=4, d=16, p=16, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=5, d=32, p=32, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=6, counter++=5, d=32, p=32, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=7, counter++=6, d=32, p=32, q=0, r=31] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=7, d=32, p=32, q=0, r=31] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=7, d=32, p=32, q=0, r=31] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=7, d=16, p=16, q=0, r=31] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=7, d=16, p=16, q=16, r=15] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=8, counter++=7, d=16, p=16, q=16, r=15] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=8, d=16, p=16, q=16, r=15] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=8, d=16, p=16, q=16, r=15] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=8, d=8, p=8, q=16, r=15] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=8, d=8, p=8, q=24, r=7] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=9, counter++=8, d=8, p=8, q=24, r=7] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=9, d=8, p=8, q=24, r=7] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=9, d=8, p=8, q=24, r=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=9, d=4, p=4, q=24, r=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=9, d=4, p=4, q=28, r=3] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=10, counter++=9, d=4, p=4, q=28, r=3] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=10, d=4, p=4, q=28, r=3] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=10, d=4, p=4, q=28, r=3] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=10, d=2, p=2, q=28, r=3] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=10, d=2, p=2, q=30, r=1] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=11, counter++=10, d=2, p=2, q=30, r=1] [L44] COND FALSE !(counter++<10) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 350.9s, OverallIterations: 23, TraceHistogramMax: 27, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 47.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 972 SdHoareTripleChecker+Valid, 20.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 900 mSDsluCounter, 4725 SdHoareTripleChecker+Invalid, 20.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3651 mSDsCounter, 693 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3062 IncrementalHoareTripleChecker+Invalid, 3760 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 693 mSolverCounterUnsat, 1074 mSDtfsCounter, 3062 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2913 GetRequests, 2665 SyntacticMatches, 29 SemanticMatches, 219 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 42.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=651occurred in iteration=16, InterpolantAutomatonStates: 191, 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, 22 MinimizatonAttempts, 440 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 297.4s InterpolantComputationTime, 1790 NumberOfCodeBlocks, 1664 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2848 ConstructedInterpolants, 0 QuantifiedInterpolants, 41144 SizeOfPredicates, 48 NumberOfNonLiveVariables, 3901 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 12686/14119 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 RESULT: Ultimate proved your program to be incorrect! [2022-02-14 23:32:31,627 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...