/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/fermat1-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 02:35:09,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 02:35:10,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 02:35:10,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 02:35:10,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 02:35:10,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 02:35:10,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 02:35:10,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 02:35:10,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 02:35:10,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 02:35:10,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 02:35:10,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 02:35:10,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 02:35:10,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 02:35:10,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 02:35:10,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 02:35:10,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 02:35:10,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 02:35:10,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 02:35:10,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 02:35:10,085 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 02:35:10,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 02:35:10,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 02:35:10,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 02:35:10,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 02:35:10,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 02:35:10,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 02:35:10,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 02:35:10,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 02:35:10,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 02:35:10,116 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 02:35:10,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 02:35:10,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 02:35:10,118 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 02:35:10,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 02:35:10,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 02:35:10,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 02:35:10,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 02:35:10,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 02:35:10,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 02:35:10,120 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 02:35:10,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 02:35:10,120 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 02:35:10,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 02:35:10,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 02:35:10,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 02:35:10,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 02:35:10,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 02:35:10,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:35:10,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 02:35:10,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 02:35:10,122 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 02:35:10,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 02:35:10,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 02:35:10,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 02:35:10,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 02:35:10,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 02:35:10,402 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 02:35:10,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-04-05 02:35:10,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6decacdd1/748ba4a70a68471ea31436acf9e71a8c/FLAGbb3571c71 [2022-04-05 02:35:10,809 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 02:35:10,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-04-05 02:35:10,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6decacdd1/748ba4a70a68471ea31436acf9e71a8c/FLAGbb3571c71 [2022-04-05 02:35:11,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6decacdd1/748ba4a70a68471ea31436acf9e71a8c [2022-04-05 02:35:11,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 02:35:11,236 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 02:35:11,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 02:35:11,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 02:35:11,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 02:35:11,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d66fd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11, skipping insertion in model container [2022-04-05 02:35:11,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 02:35:11,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 02:35:11,402 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/fermat1-ll_unwindbound20.c[535,548] [2022-04-05 02:35:11,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:35:11,422 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 02:35:11,430 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/fermat1-ll_unwindbound20.c[535,548] [2022-04-05 02:35:11,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:35:11,450 INFO L208 MainTranslator]: Completed translation [2022-04-05 02:35:11,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11 WrapperNode [2022-04-05 02:35:11,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 02:35:11,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 02:35:11,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 02:35:11,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 02:35:11,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,488 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 02:35:11,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 02:35:11,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 02:35:11,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 02:35:11,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:35:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:11,527 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) [2022-04-05 02:35:11,529 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 [2022-04-05 02:35:11,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 02:35:11,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 02:35:11,552 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 02:35:11,552 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 02:35:11,552 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 02:35:11,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 02:35:11,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 02:35:11,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 02:35:11,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 02:35:11,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 02:35:11,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 02:35:11,602 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 02:35:11,603 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 02:35:11,788 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 02:35:11,794 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 02:35:11,794 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 02:35:11,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:35:11 BoogieIcfgContainer [2022-04-05 02:35:11,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 02:35:11,797 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 02:35:11,797 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 02:35:11,798 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 02:35:11,801 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:35:11" (1/1) ... [2022-04-05 02:35:11,802 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 02:35:11,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:35:11 BasicIcfg [2022-04-05 02:35:11,818 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 02:35:11,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 02:35:11,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 02:35:11,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 02:35:11,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 02:35:11" (1/4) ... [2022-04-05 02:35:11,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782f877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:35:11, skipping insertion in model container [2022-04-05 02:35:11,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:35:11" (2/4) ... [2022-04-05 02:35:11,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782f877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:35:11, skipping insertion in model container [2022-04-05 02:35:11,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:35:11" (3/4) ... [2022-04-05 02:35:11,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@782f877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:35:11, skipping insertion in model container [2022-04-05 02:35:11,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:35:11" (4/4) ... [2022-04-05 02:35:11,830 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.cJordan [2022-04-05 02:35:11,834 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 02:35:11,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 02:35:11,865 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 02:35:11,871 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 02:35:11,871 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 02:35:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-05 02:35:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 02:35:11,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:11,889 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:11,890 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2022-04-05 02:35:11,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:11,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587729398] [2022-04-05 02:35:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:11,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:11,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:11,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868542936] [2022-04-05 02:35:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:11,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:11,988 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) [2022-04-05 02:35:12,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 02:35:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:12,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-05 02:35:12,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 02:35:12,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:35:12,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:12,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587729398] [2022-04-05 02:35:12,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:12,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868542936] [2022-04-05 02:35:12,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868542936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:35:12,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:35:12,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-05 02:35:12,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163868581] [2022-04-05 02:35:12,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:35:12,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-05 02:35:12,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-05 02:35:12,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-05 02:35:12,207 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:35:12,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:12,223 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-04-05 02:35:12,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-05 02:35:12,225 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-05 02:35:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:12,230 INFO L225 Difference]: With dead ends: 37 [2022-04-05 02:35:12,230 INFO L226 Difference]: Without dead ends: 32 [2022-04-05 02:35:12,231 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-05 02:35:12,234 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:12,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:35:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-05 02:35:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-05 02:35:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 02:35:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-05 02:35:12,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2022-04-05 02:35:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:12,274 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-05 02:35:12,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:35:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-05 02:35:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 02:35:12,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:12,287 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:12,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:12,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-05 02:35:12,513 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2022-04-05 02:35:12,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:12,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904163976] [2022-04-05 02:35:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:12,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:12,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:12,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023031140] [2022-04-05 02:35:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:12,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:12,535 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) [2022-04-05 02:35:12,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 02:35:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:12,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 02:35:12,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:12,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:35:12,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:12,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904163976] [2022-04-05 02:35:12,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:12,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023031140] [2022-04-05 02:35:12,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023031140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:35:12,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:35:12,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 02:35:12,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589006906] [2022-04-05 02:35:12,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:35:12,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 02:35:12,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 02:35:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:35:12,719 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:35:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:12,743 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-04-05 02:35:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 02:35:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 02:35:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:12,746 INFO L225 Difference]: With dead ends: 34 [2022-04-05 02:35:12,746 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 02:35:12,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:35:12,749 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:12,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:35:12,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 02:35:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-05 02:35:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 02:35:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-04-05 02:35:12,762 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-04-05 02:35:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:12,763 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-04-05 02:35:12,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 02:35:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-04-05 02:35:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 02:35:12,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:12,764 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:12,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:12,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-04-05 02:35:12,972 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:12,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2022-04-05 02:35:12,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:12,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352909008] [2022-04-05 02:35:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:12,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:12,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:12,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039398621] [2022-04-05 02:35:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:12,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:12,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:12,986 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) [2022-04-05 02:35:12,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 02:35:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:13,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 02:35:13,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:16,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:35:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:16,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352909008] [2022-04-05 02:35:16,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:16,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039398621] [2022-04-05 02:35:16,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039398621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:35:16,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:35:16,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:35:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918374758] [2022-04-05 02:35:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:35:16,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:35:16,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:16,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:35:16,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:35:16,258 INFO L87 Difference]: Start difference. First operand 34 states and 43 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:35:19,000 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 [] [2022-04-05 02:35:21,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:23,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:25,274 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 [] [2022-04-05 02:35:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:25,284 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-04-05 02:35:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:35:25,284 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-05 02:35:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:25,286 INFO L225 Difference]: With dead ends: 51 [2022-04-05 02:35:25,286 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 02:35:25,287 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:35:25,288 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:25,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 3 Unknown, 0 Unchecked, 9.0s Time] [2022-04-05 02:35:25,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 02:35:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-05 02:35:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:35:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-04-05 02:35:25,299 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2022-04-05 02:35:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:25,299 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-04-05 02:35:25,301 INFO L479 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-05 02:35:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-04-05 02:35:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 02:35:25,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:25,303 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:25,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:25,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:25,504 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2022-04-05 02:35:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:25,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691648863] [2022-04-05 02:35:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:25,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:25,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582758200] [2022-04-05 02:35:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:25,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:25,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:25,518 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) [2022-04-05 02:35:25,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 02:35:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 02:35:25,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:25,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691648863] [2022-04-05 02:35:25,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582758200] [2022-04-05 02:35:25,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582758200] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:25,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:25,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-05 02:35:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406541336] [2022-04-05 02:35:25,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:25,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 02:35:25,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 02:35:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:35:25,880 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:35:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:26,020 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-04-05 02:35:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 02:35:26,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-04-05 02:35:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:26,022 INFO L225 Difference]: With dead ends: 55 [2022-04-05 02:35:26,022 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 02:35:26,022 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-05 02:35:26,023 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:26,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 147 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:35:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 02:35:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-05 02:35:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:35:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-04-05 02:35:26,031 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2022-04-05 02:35:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:26,032 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-04-05 02:35:26,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:35:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-04-05 02:35:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 02:35:26,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:26,033 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:26,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:26,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:26,262 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:26,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2022-04-05 02:35:26,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:26,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104707927] [2022-04-05 02:35:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:26,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:26,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685918348] [2022-04-05 02:35:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:26,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:26,275 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) [2022-04-05 02:35:26,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 02:35:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:26,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:35:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:26,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:35:26,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:26,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104707927] [2022-04-05 02:35:26,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:26,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685918348] [2022-04-05 02:35:26,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685918348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:35:26,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:35:26,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:35:26,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770326360] [2022-04-05 02:35:26,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:35:26,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:35:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:35:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:35:26,417 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 02:35:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:26,444 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-04-05 02:35:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:35:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2022-04-05 02:35:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:26,445 INFO L225 Difference]: With dead ends: 60 [2022-04-05 02:35:26,445 INFO L226 Difference]: Without dead ends: 60 [2022-04-05 02:35:26,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:35:26,446 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:26,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:35:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-05 02:35:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-05 02:35:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 02:35:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2022-04-05 02:35:26,454 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 35 [2022-04-05 02:35:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:26,455 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2022-04-05 02:35:26,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 02:35:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2022-04-05 02:35:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 02:35:26,456 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:26,456 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:26,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:26,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:26,659 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:26,660 INFO L85 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2022-04-05 02:35:26,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:26,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153159108] [2022-04-05 02:35:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:26,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:26,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:26,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095095458] [2022-04-05 02:35:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:26,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:26,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:26,674 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) [2022-04-05 02:35:26,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 02:35:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:26,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:35:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:26,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 02:35:26,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:26,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153159108] [2022-04-05 02:35:26,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:26,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095095458] [2022-04-05 02:35:26,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095095458] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:35:26,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:35:26,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-04-05 02:35:26,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973756310] [2022-04-05 02:35:26,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:35:26,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:35:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:35:26,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:35:26,925 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 02:35:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:26,956 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-04-05 02:35:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:35:26,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-04-05 02:35:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:26,959 INFO L225 Difference]: With dead ends: 69 [2022-04-05 02:35:26,959 INFO L226 Difference]: Without dead ends: 69 [2022-04-05 02:35:26,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:35:26,962 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:26,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:35:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-05 02:35:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-05 02:35:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 02:35:26,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-04-05 02:35:26,983 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 41 [2022-04-05 02:35:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:26,983 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-04-05 02:35:26,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 02:35:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-04-05 02:35:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 02:35:26,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:26,986 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:27,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:27,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:27,208 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2022-04-05 02:35:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:27,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066695492] [2022-04-05 02:35:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:27,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:27,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615850447] [2022-04-05 02:35:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:27,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:27,219 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) [2022-04-05 02:35:27,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 02:35:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:27,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:35:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:27,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 02:35:27,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:27,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066695492] [2022-04-05 02:35:27,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:27,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615850447] [2022-04-05 02:35:27,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615850447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:27,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:27,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-05 02:35:27,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411696742] [2022-04-05 02:35:27,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:27,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 02:35:27,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 02:35:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:35:27,475 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-04-05 02:35:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:27,597 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2022-04-05 02:35:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 02:35:27,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 43 [2022-04-05 02:35:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:27,598 INFO L225 Difference]: With dead ends: 137 [2022-04-05 02:35:27,598 INFO L226 Difference]: Without dead ends: 137 [2022-04-05 02:35:27,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:35:27,599 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 73 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:27,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:35:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-05 02:35:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2022-04-05 02:35:27,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 89 states have (on average 1.2359550561797752) internal successors, (110), 90 states have internal predecessors, (110), 22 states have call successors, (22), 13 states have call predecessors, (22), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-05 02:35:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 152 transitions. [2022-04-05 02:35:27,609 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 152 transitions. Word has length 43 [2022-04-05 02:35:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:27,610 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 152 transitions. [2022-04-05 02:35:27,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 8 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2022-04-05 02:35:27,610 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 152 transitions. [2022-04-05 02:35:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 02:35:27,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:27,611 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:27,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:27,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:27,828 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2022-04-05 02:35:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:27,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679420578] [2022-04-05 02:35:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:27,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:27,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:27,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973905098] [2022-04-05 02:35:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:27,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:27,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:27,847 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) [2022-04-05 02:35:27,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 02:35:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:27,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 02:35:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 02:35:27,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:35:27,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679420578] [2022-04-05 02:35:27,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973905098] [2022-04-05 02:35:27,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973905098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:35:27,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:35:27,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 02:35:27,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317784237] [2022-04-05 02:35:27,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:35:27,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 02:35:27,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:27,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 02:35:27,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:35:27,994 INFO L87 Difference]: Start difference. First operand 123 states and 152 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:35:28,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:28,022 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2022-04-05 02:35:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 02:35:28,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-04-05 02:35:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:28,024 INFO L225 Difference]: With dead ends: 123 [2022-04-05 02:35:28,024 INFO L226 Difference]: Without dead ends: 123 [2022-04-05 02:35:28,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:35:28,025 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:28,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 94 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:35:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-05 02:35:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2022-04-05 02:35:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 83 states have internal predecessors, (100), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-05 02:35:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 140 transitions. [2022-04-05 02:35:28,032 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 140 transitions. Word has length 47 [2022-04-05 02:35:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:28,033 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 140 transitions. [2022-04-05 02:35:28,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:35:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 140 transitions. [2022-04-05 02:35:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-05 02:35:28,034 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:28,034 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:28,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-05 02:35:28,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-04-05 02:35:28,257 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2022-04-05 02:35:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:28,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096878173] [2022-04-05 02:35:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:28,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:28,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:28,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559080968] [2022-04-05 02:35:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:28,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:28,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:28,268 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) [2022-04-05 02:35:28,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 02:35:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:28,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 02:35:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:28,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 02:35:28,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096878173] [2022-04-05 02:35:28,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559080968] [2022-04-05 02:35:28,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559080968] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:28,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:28,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-05 02:35:28,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219444340] [2022-04-05 02:35:28,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:28,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 02:35:28,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 02:35:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:35:28,560 INFO L87 Difference]: Start difference. First operand 113 states and 140 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-04-05 02:35:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:28,720 INFO L93 Difference]: Finished difference Result 176 states and 216 transitions. [2022-04-05 02:35:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 02:35:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 49 [2022-04-05 02:35:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:28,724 INFO L225 Difference]: With dead ends: 176 [2022-04-05 02:35:28,725 INFO L226 Difference]: Without dead ends: 176 [2022-04-05 02:35:28,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-04-05 02:35:28,727 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 148 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:28,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 205 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:35:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-05 02:35:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 157. [2022-04-05 02:35:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 116 states have internal predecessors, (142), 30 states have call successors, (30), 13 states have call predecessors, (30), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-05 02:35:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2022-04-05 02:35:28,734 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 49 [2022-04-05 02:35:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:28,735 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2022-04-05 02:35:28,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 10 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2022-04-05 02:35:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2022-04-05 02:35:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-05 02:35:28,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:28,736 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:28,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:28,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:28,952 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2022-04-05 02:35:28,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:28,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024908400] [2022-04-05 02:35:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:28,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:28,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:28,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553782411] [2022-04-05 02:35:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:28,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:28,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:28,962 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) [2022-04-05 02:35:28,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 02:35:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-05 02:35:29,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:29,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 02:35:29,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:29,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024908400] [2022-04-05 02:35:29,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:29,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553782411] [2022-04-05 02:35:29,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553782411] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:29,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:29,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-05 02:35:29,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614936566] [2022-04-05 02:35:29,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:29,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 02:35:29,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:29,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 02:35:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:35:29,257 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-05 02:35:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:29,448 INFO L93 Difference]: Finished difference Result 210 states and 270 transitions. [2022-04-05 02:35:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 02:35:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 55 [2022-04-05 02:35:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:29,450 INFO L225 Difference]: With dead ends: 210 [2022-04-05 02:35:29,450 INFO L226 Difference]: Without dead ends: 210 [2022-04-05 02:35:29,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-04-05 02:35:29,451 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 226 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:29,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 279 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:35:29,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-05 02:35:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 202. [2022-04-05 02:35:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 148 states have (on average 1.2297297297297298) internal successors, (182), 152 states have internal predecessors, (182), 40 states have call successors, (40), 15 states have call predecessors, (40), 13 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-05 02:35:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 260 transitions. [2022-04-05 02:35:29,459 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 260 transitions. Word has length 55 [2022-04-05 02:35:29,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:29,459 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 260 transitions. [2022-04-05 02:35:29,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-04-05 02:35:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 260 transitions. [2022-04-05 02:35:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 02:35:29,461 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:29,461 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:29,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:29,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 02:35:29,674 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:29,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:29,675 INFO L85 PathProgramCache]: Analyzing trace with hash -725338187, now seen corresponding path program 1 times [2022-04-05 02:35:29,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:29,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083584854] [2022-04-05 02:35:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:29,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:29,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:29,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547046784] [2022-04-05 02:35:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:29,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:29,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:29,686 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) [2022-04-05 02:35:29,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 02:35:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 02:35:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-04-05 02:35:29,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-05 02:35:30,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:30,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083584854] [2022-04-05 02:35:30,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:30,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547046784] [2022-04-05 02:35:30,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547046784] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:30,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:30,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-04-05 02:35:30,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393366777] [2022-04-05 02:35:30,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:30,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 02:35:30,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:30,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 02:35:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 02:35:30,044 INFO L87 Difference]: Start difference. First operand 202 states and 260 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-05 02:35:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:30,091 INFO L93 Difference]: Finished difference Result 385 states and 525 transitions. [2022-04-05 02:35:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:35:30,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 91 [2022-04-05 02:35:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:30,094 INFO L225 Difference]: With dead ends: 385 [2022-04-05 02:35:30,094 INFO L226 Difference]: Without dead ends: 363 [2022-04-05 02:35:30,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:35:30,095 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:30,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 142 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:35:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-04-05 02:35:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 346. [2022-04-05 02:35:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 258 states have (on average 1.2635658914728682) internal successors, (326), 264 states have internal predecessors, (326), 74 states have call successors, (74), 15 states have call predecessors, (74), 13 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-04-05 02:35:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 472 transitions. [2022-04-05 02:35:30,108 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 472 transitions. Word has length 91 [2022-04-05 02:35:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:30,108 INFO L478 AbstractCegarLoop]: Abstraction has 346 states and 472 transitions. [2022-04-05 02:35:30,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-05 02:35:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 472 transitions. [2022-04-05 02:35:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-05 02:35:30,110 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:30,110 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:30,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:30,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 02:35:30,331 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1986043633, now seen corresponding path program 2 times [2022-04-05 02:35:30,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:30,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529481109] [2022-04-05 02:35:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:30,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:30,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:30,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645776027] [2022-04-05 02:35:30,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:35:30,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:30,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:30,342 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) [2022-04-05 02:35:30,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 02:35:30,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:35:30,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:30,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-05 02:35:30,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-05 02:35:30,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-05 02:35:30,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529481109] [2022-04-05 02:35:30,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645776027] [2022-04-05 02:35:30,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645776027] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:30,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:30,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-04-05 02:35:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616830972] [2022-04-05 02:35:30,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:30,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 02:35:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 02:35:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-04-05 02:35:30,909 INFO L87 Difference]: Start difference. First operand 346 states and 472 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-04-05 02:35:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:31,372 INFO L93 Difference]: Finished difference Result 846 states and 1158 transitions. [2022-04-05 02:35:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-05 02:35:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) Word has length 91 [2022-04-05 02:35:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:31,376 INFO L225 Difference]: With dead ends: 846 [2022-04-05 02:35:31,376 INFO L226 Difference]: Without dead ends: 846 [2022-04-05 02:35:31,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=719, Unknown=0, NotChecked=0, Total=1122 [2022-04-05 02:35:31,377 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 409 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:31,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 446 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 02:35:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-04-05 02:35:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 797. [2022-04-05 02:35:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 600 states have (on average 1.2666666666666666) internal successors, (760), 609 states have internal predecessors, (760), 177 states have call successors, (177), 21 states have call predecessors, (177), 19 states have return successors, (175), 166 states have call predecessors, (175), 175 states have call successors, (175) [2022-04-05 02:35:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1112 transitions. [2022-04-05 02:35:31,406 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1112 transitions. Word has length 91 [2022-04-05 02:35:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:31,406 INFO L478 AbstractCegarLoop]: Abstraction has 797 states and 1112 transitions. [2022-04-05 02:35:31,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 18 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-04-05 02:35:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1112 transitions. [2022-04-05 02:35:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-05 02:35:31,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:31,408 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:31,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 02:35:31,632 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 1 times [2022-04-05 02:35:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:31,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815858374] [2022-04-05 02:35:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:31,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:31,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435918946] [2022-04-05 02:35:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:31,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:31,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:31,643 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) [2022-04-05 02:35:31,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 02:35:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 02:35:31,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:31,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:32,286 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-05 02:35:32,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815858374] [2022-04-05 02:35:32,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435918946] [2022-04-05 02:35:32,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435918946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:32,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:32,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-04-05 02:35:32,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756782190] [2022-04-05 02:35:32,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:32,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 02:35:32,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 02:35:32,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:35:32,288 INFO L87 Difference]: Start difference. First operand 797 states and 1112 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-04-05 02:35:32,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:32,944 INFO L93 Difference]: Finished difference Result 823 states and 1086 transitions. [2022-04-05 02:35:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-05 02:35:32,945 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) Word has length 97 [2022-04-05 02:35:32,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:32,948 INFO L225 Difference]: With dead ends: 823 [2022-04-05 02:35:32,948 INFO L226 Difference]: Without dead ends: 799 [2022-04-05 02:35:32,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2022-04-05 02:35:32,950 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 721 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:32,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 434 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 02:35:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-04-05 02:35:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 744. [2022-04-05 02:35:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 556 states have (on average 1.2194244604316546) internal successors, (678), 560 states have internal predecessors, (678), 164 states have call successors, (164), 25 states have call predecessors, (164), 23 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-05 02:35:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1004 transitions. [2022-04-05 02:35:32,977 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1004 transitions. Word has length 97 [2022-04-05 02:35:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:32,977 INFO L478 AbstractCegarLoop]: Abstraction has 744 states and 1004 transitions. [2022-04-05 02:35:32,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 states have internal predecessors, (107), 22 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 20 states have call predecessors, (24), 21 states have call successors, (24) [2022-04-05 02:35:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1004 transitions. [2022-04-05 02:35:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-05 02:35:32,979 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:32,979 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-04-05 02:35:33,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:33,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 02:35:33,187 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:33,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:33,188 INFO L85 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 1 times [2022-04-05 02:35:33,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:33,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261643872] [2022-04-05 02:35:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:33,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:33,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:33,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144715754] [2022-04-05 02:35:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:33,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:33,200 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) [2022-04-05 02:35:33,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 02:35:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:33,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 02:35:33,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:33,551 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 02:35:33,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-05 02:35:33,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:33,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261643872] [2022-04-05 02:35:33,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:33,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144715754] [2022-04-05 02:35:33,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144715754] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:33,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:33,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-05 02:35:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808236278] [2022-04-05 02:35:33,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:33,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 02:35:33,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 02:35:33,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:35:33,871 INFO L87 Difference]: Start difference. First operand 744 states and 1004 transitions. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) [2022-04-05 02:35:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:34,450 INFO L93 Difference]: Finished difference Result 756 states and 998 transitions. [2022-04-05 02:35:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 02:35:34,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) Word has length 103 [2022-04-05 02:35:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:34,454 INFO L225 Difference]: With dead ends: 756 [2022-04-05 02:35:34,454 INFO L226 Difference]: Without dead ends: 756 [2022-04-05 02:35:34,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=551, Invalid=1009, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 02:35:34,455 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 460 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:34,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 410 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 02:35:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-04-05 02:35:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 750. [2022-04-05 02:35:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 562 states have (on average 1.1850533807829182) internal successors, (666), 564 states have internal predecessors, (666), 164 states have call successors, (164), 25 states have call predecessors, (164), 23 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2022-04-05 02:35:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 992 transitions. [2022-04-05 02:35:34,473 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 992 transitions. Word has length 103 [2022-04-05 02:35:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:34,474 INFO L478 AbstractCegarLoop]: Abstraction has 750 states and 992 transitions. [2022-04-05 02:35:34,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 22 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 20 states have call predecessors, (26), 21 states have call successors, (26) [2022-04-05 02:35:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 992 transitions. [2022-04-05 02:35:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-05 02:35:34,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:34,483 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 10, 8, 8, 8, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:34,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-05 02:35:34,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:34,703 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:34,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2108944290, now seen corresponding path program 3 times [2022-04-05 02:35:34,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644005898] [2022-04-05 02:35:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:34,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:34,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:34,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843355530] [2022-04-05 02:35:34,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 02:35:34,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:34,717 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) [2022-04-05 02:35:34,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 02:35:34,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 02:35:34,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:34,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 02:35:34,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2022-04-05 02:35:35,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:35:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644005898] [2022-04-05 02:35:35,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843355530] [2022-04-05 02:35:35,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843355530] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:35:35,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:35:35,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 02:35:35,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420231857] [2022-04-05 02:35:35,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:35:35,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:35:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:35:35,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:35:35,056 INFO L87 Difference]: Start difference. First operand 750 states and 992 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 02:35:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:35,094 INFO L93 Difference]: Finished difference Result 835 states and 1087 transitions. [2022-04-05 02:35:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:35:35,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 173 [2022-04-05 02:35:35,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:35,098 INFO L225 Difference]: With dead ends: 835 [2022-04-05 02:35:35,098 INFO L226 Difference]: Without dead ends: 811 [2022-04-05 02:35:35,098 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 02:35:35,099 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:35,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:35:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-04-05 02:35:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 776. [2022-04-05 02:35:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 583 states have (on average 1.1732418524871355) internal successors, (684), 585 states have internal predecessors, (684), 166 states have call successors, (166), 28 states have call predecessors, (166), 26 states have return successors, (164), 162 states have call predecessors, (164), 164 states have call successors, (164) [2022-04-05 02:35:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1014 transitions. [2022-04-05 02:35:35,118 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1014 transitions. Word has length 173 [2022-04-05 02:35:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:35,118 INFO L478 AbstractCegarLoop]: Abstraction has 776 states and 1014 transitions. [2022-04-05 02:35:35,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-05 02:35:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1014 transitions. [2022-04-05 02:35:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-05 02:35:35,121 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:35,121 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 9, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:35,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:35,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-05 02:35:35,326 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:35,337 INFO L85 PathProgramCache]: Analyzing trace with hash -147451011, now seen corresponding path program 1 times [2022-04-05 02:35:35,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:35,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125793235] [2022-04-05 02:35:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:35,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:35,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698082896] [2022-04-05 02:35:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:35,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:35,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:35,363 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) [2022-04-05 02:35:35,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 02:35:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:35:35,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2022-04-05 02:35:35,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 546 proven. 0 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2022-04-05 02:35:35,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:35:35,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:35,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125793235] [2022-04-05 02:35:35,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:35,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698082896] [2022-04-05 02:35:35,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698082896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:35:35,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:35:35,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:35:35,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426226141] [2022-04-05 02:35:35,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:35:35,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:35:35,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:35,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:35:35,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:35:35,676 INFO L87 Difference]: Start difference. First operand 776 states and 1014 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-05 02:35:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:35,703 INFO L93 Difference]: Finished difference Result 968 states and 1262 transitions. [2022-04-05 02:35:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:35:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 177 [2022-04-05 02:35:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:35,706 INFO L225 Difference]: With dead ends: 968 [2022-04-05 02:35:35,707 INFO L226 Difference]: Without dead ends: 822 [2022-04-05 02:35:35,707 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:35:35,707 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 3 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:35,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 83 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:35:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-04-05 02:35:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 773. [2022-04-05 02:35:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 583 states have (on average 1.169811320754717) internal successors, (682), 586 states have internal predecessors, (682), 163 states have call successors, (163), 28 states have call predecessors, (163), 26 states have return successors, (161), 158 states have call predecessors, (161), 161 states have call successors, (161) [2022-04-05 02:35:35,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1006 transitions. [2022-04-05 02:35:35,725 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1006 transitions. Word has length 177 [2022-04-05 02:35:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:35,725 INFO L478 AbstractCegarLoop]: Abstraction has 773 states and 1006 transitions. [2022-04-05 02:35:35,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-04-05 02:35:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1006 transitions. [2022-04-05 02:35:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-05 02:35:35,728 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:35,729 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 8, 8, 8, 8, 8, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:35,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:35,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 02:35:35,944 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1282959772, now seen corresponding path program 2 times [2022-04-05 02:35:35,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:35,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984065657] [2022-04-05 02:35:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:35,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:35,954 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:35,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058327403] [2022-04-05 02:35:35,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:35:35,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:35,963 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) [2022-04-05 02:35:35,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 02:35:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:35:36,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:36,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 02:35:36,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 226 proven. 726 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 02:35:36,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 94 proven. 182 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2022-04-05 02:35:36,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:36,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984065657] [2022-04-05 02:35:36,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:36,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058327403] [2022-04-05 02:35:36,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058327403] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:36,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:36,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2022-04-05 02:35:36,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557630737] [2022-04-05 02:35:36,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:36,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 02:35:36,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:36,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 02:35:36,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:35:36,951 INFO L87 Difference]: Start difference. First operand 773 states and 1006 transitions. Second operand has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) [2022-04-05 02:35:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:37,531 INFO L93 Difference]: Finished difference Result 766 states and 992 transitions. [2022-04-05 02:35:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-05 02:35:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) Word has length 177 [2022-04-05 02:35:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:37,534 INFO L225 Difference]: With dead ends: 766 [2022-04-05 02:35:37,535 INFO L226 Difference]: Without dead ends: 756 [2022-04-05 02:35:37,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=631, Invalid=1091, Unknown=0, NotChecked=0, Total=1722 [2022-04-05 02:35:37,536 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 460 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:37,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 471 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 02:35:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-04-05 02:35:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2022-04-05 02:35:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 569 states have (on average 1.1599297012302285) internal successors, (660), 569 states have internal predecessors, (660), 158 states have call successors, (158), 26 states have call predecessors, (158), 24 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2022-04-05 02:35:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 974 transitions. [2022-04-05 02:35:37,554 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 974 transitions. Word has length 177 [2022-04-05 02:35:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:37,554 INFO L478 AbstractCegarLoop]: Abstraction has 752 states and 974 transitions. [2022-04-05 02:35:37,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.625) internal successors, (183), 24 states have internal predecessors, (183), 22 states have call successors, (44), 20 states have call predecessors, (44), 20 states have return successors, (42), 21 states have call predecessors, (42), 22 states have call successors, (42) [2022-04-05 02:35:37,554 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 974 transitions. [2022-04-05 02:35:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-05 02:35:37,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:37,558 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:37,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:37,782 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 02:35:37,783 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash 529165983, now seen corresponding path program 2 times [2022-04-05 02:35:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:37,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362642289] [2022-04-05 02:35:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:37,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:37,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930076247] [2022-04-05 02:35:37,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:35:37,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:37,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:37,796 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) [2022-04-05 02:35:37,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 02:35:37,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:35:37,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:37,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-05 02:35:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 490 proven. 112 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-04-05 02:35:41,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 189 proven. 92 refuted. 0 times theorem prover too weak. 779 trivial. 0 not checked. [2022-04-05 02:35:41,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:41,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362642289] [2022-04-05 02:35:41,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:41,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930076247] [2022-04-05 02:35:41,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930076247] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:41,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:41,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2022-04-05 02:35:41,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337342806] [2022-04-05 02:35:41,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:41,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 02:35:41,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:41,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 02:35:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-04-05 02:35:41,908 INFO L87 Difference]: Start difference. First operand 752 states and 974 transitions. Second operand has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) [2022-04-05 02:35:45,437 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 [] [2022-04-05 02:35:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:48,632 INFO L93 Difference]: Finished difference Result 1533 states and 2089 transitions. [2022-04-05 02:35:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-05 02:35:48,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) Word has length 183 [2022-04-05 02:35:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:48,638 INFO L225 Difference]: With dead ends: 1533 [2022-04-05 02:35:48,638 INFO L226 Difference]: Without dead ends: 1517 [2022-04-05 02:35:48,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 347 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2022-04-05 02:35:48,639 INFO L913 BasicCegarLoop]: 199 mSDtfsCounter, 95 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:48,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1690 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 667 Invalid, 1 Unknown, 620 Unchecked, 3.9s Time] [2022-04-05 02:35:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-04-05 02:35:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1094. [2022-04-05 02:35:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 831 states have (on average 1.200962695547533) internal successors, (998), 831 states have internal predecessors, (998), 238 states have call successors, (238), 26 states have call predecessors, (238), 24 states have return successors, (236), 236 states have call predecessors, (236), 236 states have call successors, (236) [2022-04-05 02:35:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1472 transitions. [2022-04-05 02:35:48,671 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1472 transitions. Word has length 183 [2022-04-05 02:35:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:48,671 INFO L478 AbstractCegarLoop]: Abstraction has 1094 states and 1472 transitions. [2022-04-05 02:35:48,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.157894736842105) internal successors, (117), 17 states have internal predecessors, (117), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 17 states have call predecessors, (39), 15 states have call successors, (39) [2022-04-05 02:35:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1472 transitions. [2022-04-05 02:35:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-05 02:35:48,675 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:48,675 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:48,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:48,898 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 02:35:48,899 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:48,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1607491483, now seen corresponding path program 3 times [2022-04-05 02:35:48,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:48,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107643268] [2022-04-05 02:35:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:48,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:48,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:48,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098309876] [2022-04-05 02:35:48,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 02:35:48,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:48,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:48,914 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) [2022-04-05 02:35:48,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 02:35:48,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 02:35:48,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:48,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 02:35:48,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 128 proven. 1 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2022-04-05 02:35:49,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:51,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107643268] [2022-04-05 02:35:51,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098309876] [2022-04-05 02:35:51,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098309876] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 02:35:51,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:35:51,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 02:35:51,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173158179] [2022-04-05 02:35:51,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:51,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 02:35:51,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 02:35:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2022-04-05 02:35:51,456 INFO L87 Difference]: Start difference. First operand 1094 states and 1472 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:35:52,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:35:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:53,106 INFO L93 Difference]: Finished difference Result 1154 states and 1551 transitions. [2022-04-05 02:35:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 02:35:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 183 [2022-04-05 02:35:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:53,110 INFO L225 Difference]: With dead ends: 1154 [2022-04-05 02:35:53,111 INFO L226 Difference]: Without dead ends: 1121 [2022-04-05 02:35:53,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-04-05 02:35:53,111 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 37 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:53,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 276 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-05 02:35:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-04-05 02:35:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1061. [2022-04-05 02:35:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 800 states have (on average 1.19125) internal successors, (953), 811 states have internal predecessors, (953), 234 states have call successors, (234), 28 states have call predecessors, (234), 26 states have return successors, (232), 221 states have call predecessors, (232), 232 states have call successors, (232) [2022-04-05 02:35:53,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1419 transitions. [2022-04-05 02:35:53,137 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1419 transitions. Word has length 183 [2022-04-05 02:35:53,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:53,137 INFO L478 AbstractCegarLoop]: Abstraction has 1061 states and 1419 transitions. [2022-04-05 02:35:53,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:35:53,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1419 transitions. [2022-04-05 02:35:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-05 02:35:53,141 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:53,141 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 10, 10, 10, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:53,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:53,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:53,364 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash -310501698, now seen corresponding path program 4 times [2022-04-05 02:35:53,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:53,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863546147] [2022-04-05 02:35:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:53,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:53,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919731529] [2022-04-05 02:35:53,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 02:35:53,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:53,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:53,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:53,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 02:35:53,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 02:35:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:35:53,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 02:35:53,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:35:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 402 proven. 144 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-04-05 02:35:53,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:35:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 142 proven. 156 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2022-04-05 02:35:54,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:35:54,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863546147] [2022-04-05 02:35:54,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:35:54,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919731529] [2022-04-05 02:35:54,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919731529] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:35:54,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:35:54,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-04-05 02:35:54,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500383881] [2022-04-05 02:35:54,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:35:54,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 02:35:54,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:35:54,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 02:35:54,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-04-05 02:35:54,256 INFO L87 Difference]: Start difference. First operand 1061 states and 1419 transitions. Second operand has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) [2022-04-05 02:35:55,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:35:55,264 INFO L93 Difference]: Finished difference Result 1831 states and 2445 transitions. [2022-04-05 02:35:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 02:35:55,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) Word has length 183 [2022-04-05 02:35:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:35:55,271 INFO L225 Difference]: With dead ends: 1831 [2022-04-05 02:35:55,272 INFO L226 Difference]: Without dead ends: 1826 [2022-04-05 02:35:55,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 02:35:55,273 INFO L913 BasicCegarLoop]: 162 mSDtfsCounter, 297 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 02:35:55,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 696 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 02:35:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-04-05 02:35:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1333. [2022-04-05 02:35:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1007 states have (on average 1.163853028798411) internal successors, (1172), 1018 states have internal predecessors, (1172), 299 states have call successors, (299), 28 states have call predecessors, (299), 26 states have return successors, (297), 286 states have call predecessors, (297), 297 states have call successors, (297) [2022-04-05 02:35:55,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1768 transitions. [2022-04-05 02:35:55,350 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1768 transitions. Word has length 183 [2022-04-05 02:35:55,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:35:55,350 INFO L478 AbstractCegarLoop]: Abstraction has 1333 states and 1768 transitions. [2022-04-05 02:35:55,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 18 states have internal predecessors, (118), 18 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (37), 18 states have call predecessors, (37), 18 states have call successors, (37) [2022-04-05 02:35:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1768 transitions. [2022-04-05 02:35:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-05 02:35:55,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:35:55,355 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:55,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:55,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:55,571 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:35:55,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:35:55,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1584301742, now seen corresponding path program 5 times [2022-04-05 02:35:55,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:35:55,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870104588] [2022-04-05 02:35:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:35:55,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:35:55,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:35:55,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386912592] [2022-04-05 02:35:55,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 02:35:55,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:55,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:35:55,585 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:35:55,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 02:35:56,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-04-05 02:35:56,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-05 02:35:56,028 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-05 02:35:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-05 02:35:56,188 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-05 02:35:56,188 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-05 02:35:56,189 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 02:35:56,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-05 02:35:56,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:35:56,401 INFO L719 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:35:56,404 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 02:35:56,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:35:56 BasicIcfg [2022-04-05 02:35:56,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 02:35:56,465 INFO L158 Benchmark]: Toolchain (without parser) took 45228.44ms. Allocated memory was 179.3MB in the beginning and 228.6MB in the end (delta: 49.3MB). Free memory was 129.9MB in the beginning and 160.7MB in the end (delta: -30.8MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2022-04-05 02:35:56,465 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 179.3MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 02:35:56,465 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.99ms. Allocated memory is still 179.3MB. Free memory was 129.8MB in the beginning and 155.3MB in the end (delta: -25.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-05 02:35:56,465 INFO L158 Benchmark]: Boogie Preprocessor took 42.85ms. Allocated memory is still 179.3MB. Free memory was 155.3MB in the beginning and 153.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 02:35:56,466 INFO L158 Benchmark]: RCFGBuilder took 301.06ms. Allocated memory is still 179.3MB. Free memory was 153.8MB in the beginning and 142.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 02:35:56,466 INFO L158 Benchmark]: IcfgTransformer took 20.92ms. Allocated memory is still 179.3MB. Free memory was 142.7MB in the beginning and 141.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 02:35:56,466 INFO L158 Benchmark]: TraceAbstraction took 44641.37ms. Allocated memory was 179.3MB in the beginning and 228.6MB in the end (delta: 49.3MB). Free memory was 140.8MB in the beginning and 160.7MB in the end (delta: -19.9MB). Peak memory consumption was 30.8MB. Max. memory is 8.0GB. [2022-04-05 02:35:56,467 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 179.3MB. Free memory is still 146.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.99ms. Allocated memory is still 179.3MB. Free memory was 129.8MB in the beginning and 155.3MB in the end (delta: -25.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.85ms. Allocated memory is still 179.3MB. Free memory was 155.3MB in the beginning and 153.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 301.06ms. Allocated memory is still 179.3MB. Free memory was 153.8MB in the beginning and 142.9MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.92ms. Allocated memory is still 179.3MB. Free memory was 142.7MB in the beginning and 141.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 44641.37ms. Allocated memory was 179.3MB in the beginning and 228.6MB in the end (delta: 49.3MB). Free memory was 140.8MB in the beginning and 160.7MB in the end (delta: -19.9MB). Peak memory consumption was 30.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=26, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=573, counter=0, R=23] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=573, counter=0, R=23] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=573, counter=0, R=23, r=-44, u=47, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=1, counter++=0, r=-44, R=23, u=47, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=1, r=-44, R=23, u=47, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=1, R=23, r=-44, u=47, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=2, counter++=1, r=-44, R=23, u=47, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=2, r=-44, R=23, u=47, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=2, R=23, r=-44, u=47, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=3, counter++=2, R=23, r=-44, u=47, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=3, R=23, r=-44, u=47, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=3, R=23, r=3, u=49, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=4, counter++=3, r=3, R=23, u=49, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=4, R=23, r=3, u=49, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=4, r=3, R=23, u=49, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=5, counter++=4, r=3, R=23, u=49, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=5, R=23, r=3, u=49, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=5, R=23, r=3, u=49, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=6, counter++=5, R=23, r=3, u=49, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=6, r=3, R=23, u=49, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=6, r=2, R=23, u=49, v=3] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=7, counter++=6, r=2, R=23, u=49, v=3] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=7, r=2, R=23, u=49, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=7, R=23, r=-1, u=49, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=8, counter++=7, r=-1, R=23, u=49, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=8, r=-1, R=23, u=49, v=5] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=8, R=23, r=-1, u=49, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=9, counter++=8, R=23, r=-1, u=49, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=9, r=-1, R=23, u=49, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=9, R=23, r=48, u=51, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=10, counter++=9, r=48, R=23, u=51, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=10, r=48, R=23, u=51, v=5] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=10, R=23, r=48, u=51, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=11, counter++=10, r=48, R=23, u=51, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=11, r=48, R=23, u=51, v=5] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=573, counter=11, R=23, r=48, u=51, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=12, counter++=11, R=23, r=48, u=51, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=12, r=48, R=23, u=51, v=5] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=12, r=43, R=23, u=51, v=7] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=13, counter++=12, R=23, r=43, u=51, v=7] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=13, r=43, R=23, u=51, v=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=13, R=23, r=36, u=51, v=9] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=14, counter++=13, r=36, R=23, u=51, v=9] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=14, r=36, R=23, u=51, v=9] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=14, r=27, R=23, u=51, v=11] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=15, counter++=14, R=23, r=27, u=51, v=11] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=15, R=23, r=27, u=51, v=11] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=15, r=16, R=23, u=51, v=13] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=16, counter++=15, R=23, r=16, u=51, v=13] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=16, R=23, r=16, u=51, v=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=16, r=3, R=23, u=51, v=15] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=17, counter++=16, R=23, r=3, u=51, v=15] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=17, R=23, r=3, u=51, v=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=573, counter=17, r=-12, R=23, u=51, v=17] [L39] EXPR counter++ VAL [\old(counter)=0, A=573, counter=18, counter++=17, R=23, r=-12, u=51, v=17] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=18, R=23, r=-12, u=51, v=17] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=573, counter=18, r=-12, R=23, u=51, v=17] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=19, counter++=18, R=23, r=-12, u=51, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=19, R=23, r=-12, u=51, v=17] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=573, counter=19, r=39, R=23, u=53, v=17] [L47] EXPR counter++ VAL [\old(counter)=0, A=573, counter=20, counter++=19, R=23, r=39, u=53, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=573, counter=20, r=39, R=23, u=53, v=17] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=573, counter=20, r=39, R=23, u=53, v=17] [L34] EXPR counter++ VAL [\old(counter)=0, A=573, counter=21, counter++=20, r=39, R=23, u=53, v=17] [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 44.5s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 21.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 3081 SdHoareTripleChecker+Valid, 17.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3060 mSDsluCounter, 6253 SdHoareTripleChecker+Invalid, 16.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 620 IncrementalHoareTripleChecker+Unchecked, 4909 mSDsCounter, 1879 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3172 IncrementalHoareTripleChecker+Invalid, 5675 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1879 mSolverCounterUnsat, 1344 mSDtfsCounter, 3172 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3087 GetRequests, 2760 SyntacticMatches, 9 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1333occurred in iteration=20, InterpolantAutomatonStates: 315, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 1244 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 15.5s InterpolantComputationTime, 2008 NumberOfCodeBlocks, 1737 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2935 ConstructedInterpolants, 44 QuantifiedInterpolants, 10300 SizeOfPredicates, 86 NumberOfNonLiveVariables, 4126 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 32 InterpolantComputations, 8 PerfectInterpolantSequences, 8903/11070 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! [2022-04-05 02:35:56,497 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...