/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 05:43:07,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 05:43:07,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 05:43:07,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 05:43:07,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 05:43:07,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 05:43:07,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 05:43:07,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 05:43:07,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 05:43:07,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 05:43:07,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 05:43:07,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 05:43:07,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 05:43:07,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 05:43:07,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 05:43:07,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 05:43:07,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 05:43:07,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 05:43:07,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 05:43:07,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 05:43:07,577 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 05:43:07,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 05:43:07,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 05:43:07,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 05:43:07,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 05:43:07,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 05:43:07,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 05:43:07,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 05:43:07,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 05:43:07,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 05:43:07,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 05:43:07,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 05:43:07,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 05:43:07,595 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 05:43:07,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 05:43:07,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 05:43:07,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 05:43:07,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 05:43:07,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 05:43:07,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 05:43:07,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:43:07,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 05:43:07,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 05:43:07,597 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 05:43:07,597 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 05:43:07,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 05:43:07,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 05:43:07,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 05:43:07,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 05:43:07,750 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 05:43:07,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2022-03-20 05:43:07,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5488dc46/ed65dbcdbc1e4d34a1301b76b33910b1/FLAG45271db9c [2022-03-20 05:43:08,117 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 05:43:08,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2022-03-20 05:43:08,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5488dc46/ed65dbcdbc1e4d34a1301b76b33910b1/FLAG45271db9c [2022-03-20 05:43:08,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5488dc46/ed65dbcdbc1e4d34a1301b76b33910b1 [2022-03-20 05:43:08,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 05:43:08,532 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 05:43:08,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 05:43:08,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 05:43:08,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 05:43:08,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f3a81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08, skipping insertion in model container [2022-03-20 05:43:08,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 05:43:08,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 05:43:08,702 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2022-03-20 05:43:08,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:43:08,770 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 05:43:08,777 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2022-03-20 05:43:08,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 05:43:08,818 INFO L208 MainTranslator]: Completed translation [2022-03-20 05:43:08,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08 WrapperNode [2022-03-20 05:43:08,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 05:43:08,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 05:43:08,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 05:43:08,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 05:43:08,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 05:43:08,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 05:43:08,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 05:43:08,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 05:43:08,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (1/1) ... [2022-03-20 05:43:08,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 05:43:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:08,877 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 05:43:08,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 05:43:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 05:43:08,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 05:43:08,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 05:43:08,907 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 05:43:08,907 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 05:43:08,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 05:43:08,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 05:43:08,907 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 05:43:08,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 05:43:08,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 05:43:08,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 05:43:08,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 05:43:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 05:43:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 05:43:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 05:43:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 05:43:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 05:43:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 05:43:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 05:43:08,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 05:43:08,955 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 05:43:08,956 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 05:43:09,053 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 05:43:09,057 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 05:43:09,057 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 05:43:09,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:43:09 BoogieIcfgContainer [2022-03-20 05:43:09,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 05:43:09,059 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 05:43:09,059 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 05:43:09,060 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 05:43:09,062 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:43:09" (1/1) ... [2022-03-20 05:43:09,064 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 05:43:09,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:43:09 BasicIcfg [2022-03-20 05:43:09,081 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 05:43:09,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 05:43:09,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 05:43:09,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 05:43:09,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:43:08" (1/4) ... [2022-03-20 05:43:09,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646005d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:43:09, skipping insertion in model container [2022-03-20 05:43:09,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:43:08" (2/4) ... [2022-03-20 05:43:09,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646005d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:43:09, skipping insertion in model container [2022-03-20 05:43:09,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:43:09" (3/4) ... [2022-03-20 05:43:09,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646005d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:43:09, skipping insertion in model container [2022-03-20 05:43:09,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 05:43:09" (4/4) ... [2022-03-20 05:43:09,087 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.cJordan [2022-03-20 05:43:09,102 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 05:43:09,103 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 05:43:09,132 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 05:43:09,137 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 05:43:09,137 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 05:43:09,146 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 05:43:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 05:43:09,151 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:09,151 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:09,152 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:09,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:09,155 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-03-20 05:43:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:09,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262496654] [2022-03-20 05:43:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:09,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 05:43:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:09,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 05:43:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:09,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 05:43:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:09,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:09,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262496654] [2022-03-20 05:43:09,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262496654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:09,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:09,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 05:43:09,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137960800] [2022-03-20 05:43:09,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:09,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 05:43:09,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 05:43:09,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:43:09,429 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 05:43:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:09,534 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-03-20 05:43:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 05:43:09,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 [2022-03-20 05:43:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:09,541 INFO L225 Difference]: With dead ends: 41 [2022-03-20 05:43:09,541 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 05:43:09,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 05:43:09,545 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:09,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 05:43:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 05:43:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 05:43:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-20 05:43:09,569 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-20 05:43:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:09,569 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-20 05:43:09,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 05:43:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-20 05:43:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 05:43:09,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:09,570 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] [2022-03-20 05:43:09,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 05:43:09,571 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-03-20 05:43:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:09,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197729568] [2022-03-20 05:43:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:09,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:09,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128103104] [2022-03-20 05:43:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:09,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:43:09,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 05:43:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:09,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 05:43:09,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:09,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:09,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:09,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197729568] [2022-03-20 05:43:09,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:09,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128103104] [2022-03-20 05:43:09,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128103104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:09,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:09,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 05:43:09,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556391179] [2022-03-20 05:43:09,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:09,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 05:43:09,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:09,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 05:43:09,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 05:43:09,729 INFO L87 Difference]: Start difference. First operand 35 states and 45 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) [2022-03-20 05:43:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:09,739 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-03-20 05:43:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 05:43:09,740 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 [2022-03-20 05:43:09,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:09,741 INFO L225 Difference]: With dead ends: 37 [2022-03-20 05:43:09,741 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 05:43:09,741 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 [2022-03-20 05:43:09,742 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:09,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 05:43:09,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 05:43:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 05:43:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-20 05:43:09,748 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-20 05:43:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:09,749 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-20 05:43:09,749 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) [2022-03-20 05:43:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-20 05:43:09,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 05:43:09,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:09,750 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, 1] [2022-03-20 05:43:09,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:09,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:09,952 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:09,952 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-03-20 05:43:09,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:09,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181798097] [2022-03-20 05:43:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:09,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:09,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128947748] [2022-03-20 05:43:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:09,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:09,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:43:09,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 05:43:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:10,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:43:10,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 05:43:10,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:10,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:10,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181798097] [2022-03-20 05:43:10,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:10,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128947748] [2022-03-20 05:43:10,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128947748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:10,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:10,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 05:43:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985785424] [2022-03-20 05:43:10,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:10,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 05:43:10,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 05:43:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:43:10,101 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:43:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:10,146 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-03-20 05:43:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:43:10,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-20 05:43:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:10,147 INFO L225 Difference]: With dead ends: 50 [2022-03-20 05:43:10,147 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 05:43:10,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 05:43:10,148 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:10,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 05:43:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-03-20 05:43:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 05:43:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-03-20 05:43:10,154 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-03-20 05:43:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:10,154 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-03-20 05:43:10,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:43:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-03-20 05:43:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 05:43:10,155 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:10,155 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] [2022-03-20 05:43:10,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:10,372 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,SelfDestructingSolverStorable2 [2022-03-20 05:43:10,372 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:10,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-03-20 05:43:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:10,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646020548] [2022-03-20 05:43:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:10,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:10,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:10,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894524706] [2022-03-20 05:43:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:10,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:10,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:43:10,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 05:43:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:43:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:10,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:10,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646020548] [2022-03-20 05:43:10,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:10,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894524706] [2022-03-20 05:43:10,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894524706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:10,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:10,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:43:10,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060193533] [2022-03-20 05:43:10,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:10,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:43:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:10,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:43:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:43:10,572 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-20 05:43:10,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:10,607 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-20 05:43:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:43:10,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 29 [2022-03-20 05:43:10,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:10,610 INFO L225 Difference]: With dead ends: 40 [2022-03-20 05:43:10,610 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 05:43:10,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:43:10,611 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:10,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:10,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 05:43:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-20 05:43:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 05:43:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-03-20 05:43:10,621 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-03-20 05:43:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:10,621 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-03-20 05:43:10,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-20 05:43:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-03-20 05:43:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 05:43:10,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:10,622 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, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:10,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 05:43:10,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:10,837 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-03-20 05:43:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:10,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139950891] [2022-03-20 05:43:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:10,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:10,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133116820] [2022-03-20 05:43:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:10,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:43:10,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 05:43:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:10,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 05:43:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 05:43:11,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:11,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:11,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139950891] [2022-03-20 05:43:11,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:11,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133116820] [2022-03-20 05:43:11,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133116820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:11,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:11,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 05:43:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330802620] [2022-03-20 05:43:11,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:11,114 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:43:11,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:11,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:43:11,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:43:11,117 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:43:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:11,260 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-03-20 05:43:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 05:43:11,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-20 05:43:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:11,261 INFO L225 Difference]: With dead ends: 66 [2022-03-20 05:43:11,261 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 05:43:11,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:43:11,262 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 60 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:11,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 290 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 05:43:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-03-20 05:43:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 05:43:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-20 05:43:11,268 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-20 05:43:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:11,268 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-20 05:43:11,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 05:43:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-20 05:43:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 05:43:11,269 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:11,269 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, 1] [2022-03-20 05:43:11,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 05:43:11,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:11,484 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-03-20 05:43:11,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:11,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725554348] [2022-03-20 05:43:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:11,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:11,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:11,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494521412] [2022-03-20 05:43:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:11,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:11,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:11,508 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) [2022-03-20 05:43:11,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 05:43:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:43:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:11,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:11,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:11,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725554348] [2022-03-20 05:43:11,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:11,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494521412] [2022-03-20 05:43:11,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494521412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:11,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:11,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 05:43:11,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66882590] [2022-03-20 05:43:11,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:11,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:43:11,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:11,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:43:11,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:43:11,667 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 05:43:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:11,750 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-03-20 05:43:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 05:43:11,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-03-20 05:43:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:11,752 INFO L225 Difference]: With dead ends: 144 [2022-03-20 05:43:11,752 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 05:43:11,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-03-20 05:43:11,753 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:11,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 286 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 05:43:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-03-20 05:43:11,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 05:43:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-03-20 05:43:11,763 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-03-20 05:43:11,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:11,763 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-03-20 05:43:11,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 05:43:11,763 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-03-20 05:43:11,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 05:43:11,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:11,764 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] [2022-03-20 05:43:11,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 05:43:11,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:11,981 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:11,981 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-03-20 05:43:11,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:11,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025363696] [2022-03-20 05:43:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:11,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:11,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6811829] [2022-03-20 05:43:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:12,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:12,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:12,005 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) [2022-03-20 05:43:12,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 05:43:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:12,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:43:12,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 05:43:12,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 05:43:12,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:12,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025363696] [2022-03-20 05:43:12,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:12,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6811829] [2022-03-20 05:43:12,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6811829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:12,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:12,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 05:43:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613802059] [2022-03-20 05:43:12,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:12,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 05:43:12,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 05:43:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 05:43:12,201 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 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) [2022-03-20 05:43:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:12,322 INFO L93 Difference]: Finished difference Result 175 states and 251 transitions. [2022-03-20 05:43:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 05:43:12,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 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 31 [2022-03-20 05:43:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:12,323 INFO L225 Difference]: With dead ends: 175 [2022-03-20 05:43:12,323 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 05:43:12,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-20 05:43:12,324 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 115 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:12,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 301 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 05:43:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-03-20 05:43:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 05:43:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-03-20 05:43:12,333 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-03-20 05:43:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:12,333 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-03-20 05:43:12,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 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) [2022-03-20 05:43:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-03-20 05:43:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 05:43:12,334 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:12,334 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, 1, 1, 1, 1, 1] [2022-03-20 05:43:12,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 05:43:12,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:12,551 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:12,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:12,551 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-03-20 05:43:12,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:12,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840872470] [2022-03-20 05:43:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:12,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:12,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145776400] [2022-03-20 05:43:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:12,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:12,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:12,567 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) [2022-03-20 05:43:12,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 05:43:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 05:43:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 05:43:12,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:12,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840872470] [2022-03-20 05:43:12,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145776400] [2022-03-20 05:43:12,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145776400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:12,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:12,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 05:43:12,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132833356] [2022-03-20 05:43:12,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:12,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:43:12,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:43:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:43:12,790 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 05:43:12,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:12,944 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2022-03-20 05:43:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 05:43:12,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-03-20 05:43:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:12,947 INFO L225 Difference]: With dead ends: 155 [2022-03-20 05:43:12,947 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 05:43:12,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 05:43:12,948 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:12,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 249 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:12,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 05:43:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-03-20 05:43:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 05:43:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-03-20 05:43:12,961 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-03-20 05:43:12,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:12,961 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-03-20 05:43:12,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 05:43:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-03-20 05:43:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 05:43:12,962 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:12,962 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 05:43:12,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:13,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:13,163 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:13,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:13,164 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-03-20 05:43:13,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:13,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92267116] [2022-03-20 05:43:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:13,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:13,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540365538] [2022-03-20 05:43:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:13,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:13,175 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) [2022-03-20 05:43:13,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 05:43:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:13,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 05:43:13,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 05:43:13,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:13,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:13,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92267116] [2022-03-20 05:43:13,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:13,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540365538] [2022-03-20 05:43:13,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540365538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:13,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:13,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-20 05:43:13,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106494725] [2022-03-20 05:43:13,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:13,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 05:43:13,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 05:43:13,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:43:13,504 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:43:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:13,617 INFO L93 Difference]: Finished difference Result 177 states and 239 transitions. [2022-03-20 05:43:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 05:43:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-20 05:43:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:13,619 INFO L225 Difference]: With dead ends: 177 [2022-03-20 05:43:13,619 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 05:43:13,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:43:13,620 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 61 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:13,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 432 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 05:43:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-03-20 05:43:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 05:43:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-03-20 05:43:13,627 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-03-20 05:43:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:13,628 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-03-20 05:43:13,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:43:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-03-20 05:43:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 05:43:13,629 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:13,629 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:13,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:13,836 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,SelfDestructingSolverStorable8 [2022-03-20 05:43:13,837 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:13,838 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-03-20 05:43:13,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:13,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040215888] [2022-03-20 05:43:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:13,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:13,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:13,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011417365] [2022-03-20 05:43:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:13,873 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) [2022-03-20 05:43:13,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 05:43:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:13,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 05:43:13,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:13,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:13,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:13,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040215888] [2022-03-20 05:43:13,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:13,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011417365] [2022-03-20 05:43:13,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011417365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:13,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:13,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 05:43:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861790735] [2022-03-20 05:43:13,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:13,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 05:43:13,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:13,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 05:43:13,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:43:13,971 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-03-20 05:43:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:13,995 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-03-20 05:43:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:43:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 36 [2022-03-20 05:43:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:13,997 INFO L225 Difference]: With dead ends: 174 [2022-03-20 05:43:13,997 INFO L226 Difference]: Without dead ends: 174 [2022-03-20 05:43:13,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:43:13,998 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:13,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-20 05:43:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-20 05:43:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 05:43:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-03-20 05:43:14,004 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-03-20 05:43:14,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:14,004 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-03-20 05:43:14,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-03-20 05:43:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-03-20 05:43:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 05:43:14,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:14,005 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 05:43:14,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:14,222 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 05:43:14,222 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-03-20 05:43:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:14,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037225263] [2022-03-20 05:43:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:14,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:14,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422420637] [2022-03-20 05:43:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:14,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:14,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:14,251 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) [2022-03-20 05:43:14,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 05:43:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:14,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:43:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 05:43:14,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:14,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:14,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037225263] [2022-03-20 05:43:14,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:14,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422420637] [2022-03-20 05:43:14,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422420637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:14,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:14,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:43:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023043799] [2022-03-20 05:43:14,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:14,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:43:14,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:43:14,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:43:14,359 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:43:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:14,389 INFO L93 Difference]: Finished difference Result 237 states and 331 transitions. [2022-03-20 05:43:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:43:14,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 05:43:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:14,390 INFO L225 Difference]: With dead ends: 237 [2022-03-20 05:43:14,390 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 05:43:14,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:43:14,391 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:14,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:14,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 05:43:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-03-20 05:43:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 05:43:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-03-20 05:43:14,399 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-03-20 05:43:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:14,399 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-03-20 05:43:14,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 05:43:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-03-20 05:43:14,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 05:43:14,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:14,400 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:14,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:14,610 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,SelfDestructingSolverStorable10 [2022-03-20 05:43:14,610 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:14,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-03-20 05:43:14,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:14,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633693657] [2022-03-20 05:43:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:14,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:14,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:14,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479482050] [2022-03-20 05:43:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:14,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:14,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:14,639 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) [2022-03-20 05:43:14,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 05:43:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 05:43:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:14,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:14,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:14,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633693657] [2022-03-20 05:43:14,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:14,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479482050] [2022-03-20 05:43:14,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479482050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:14,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:14,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 05:43:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690588335] [2022-03-20 05:43:14,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:14,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 05:43:14,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:14,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 05:43:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 05:43:14,938 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 05:43:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:15,536 INFO L93 Difference]: Finished difference Result 390 states and 576 transitions. [2022-03-20 05:43:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 05:43:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-20 05:43:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:15,538 INFO L225 Difference]: With dead ends: 390 [2022-03-20 05:43:15,538 INFO L226 Difference]: Without dead ends: 390 [2022-03-20 05:43:15,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-20 05:43:15,539 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:15,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 438 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 05:43:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-20 05:43:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-03-20 05:43:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 05:43:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-03-20 05:43:15,550 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-03-20 05:43:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:15,550 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-03-20 05:43:15,550 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 05:43:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-03-20 05:43:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 05:43:15,551 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:15,551 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:15,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:15,764 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,SelfDestructingSolverStorable11 [2022-03-20 05:43:15,764 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:15,764 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-03-20 05:43:15,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:15,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769084120] [2022-03-20 05:43:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:15,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:15,772 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:15,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072931020] [2022-03-20 05:43:15,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:15,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:15,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:15,774 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) [2022-03-20 05:43:15,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 05:43:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 05:43:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 05:43:15,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:15,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769084120] [2022-03-20 05:43:15,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072931020] [2022-03-20 05:43:15,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072931020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:15,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:15,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:43:15,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525409603] [2022-03-20 05:43:15,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:15,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:43:15,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:15,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:43:15,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:43:15,890 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 05:43:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:15,929 INFO L93 Difference]: Finished difference Result 564 states and 884 transitions. [2022-03-20 05:43:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:43:15,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-20 05:43:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:15,932 INFO L225 Difference]: With dead ends: 564 [2022-03-20 05:43:15,932 INFO L226 Difference]: Without dead ends: 564 [2022-03-20 05:43:15,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:43:15,933 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:15,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-20 05:43:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-03-20 05:43:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-03-20 05:43:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-03-20 05:43:15,948 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-03-20 05:43:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:15,948 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-03-20 05:43:15,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 05:43:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-03-20 05:43:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 05:43:15,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:15,949 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:15,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 05:43:16,163 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,SelfDestructingSolverStorable12 [2022-03-20 05:43:16,163 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:16,164 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-03-20 05:43:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:16,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60917867] [2022-03-20 05:43:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:16,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:16,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:16,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157886614] [2022-03-20 05:43:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:16,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:16,178 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) [2022-03-20 05:43:16,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 05:43:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 05:43:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 05:43:16,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 05:43:16,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60917867] [2022-03-20 05:43:16,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:16,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157886614] [2022-03-20 05:43:16,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157886614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:16,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:16,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 05:43:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527283175] [2022-03-20 05:43:16,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:16,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 05:43:16,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 05:43:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:43:16,434 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 05:43:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:16,596 INFO L93 Difference]: Finished difference Result 770 states and 1118 transitions. [2022-03-20 05:43:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 05:43:16,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-20 05:43:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:16,601 INFO L225 Difference]: With dead ends: 770 [2022-03-20 05:43:16,601 INFO L226 Difference]: Without dead ends: 770 [2022-03-20 05:43:16,601 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-03-20 05:43:16,601 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 158 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:16,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 272 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-20 05:43:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-03-20 05:43:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-03-20 05:43:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-03-20 05:43:16,621 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-03-20 05:43:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:16,621 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-03-20 05:43:16,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 05:43:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-03-20 05:43:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 05:43:16,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:16,622 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 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] [2022-03-20 05:43:16,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:16,840 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,SelfDestructingSolverStorable13 [2022-03-20 05:43:16,840 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-03-20 05:43:16,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:16,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948200596] [2022-03-20 05:43:16,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:16,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:16,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:16,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803795975] [2022-03-20 05:43:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:16,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:16,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:16,867 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) [2022-03-20 05:43:16,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 05:43:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:16,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 05:43:16,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:17,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 05:43:17,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948200596] [2022-03-20 05:43:17,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803795975] [2022-03-20 05:43:17,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803795975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:17,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:17,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 05:43:17,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864414023] [2022-03-20 05:43:17,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:17,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 05:43:17,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:17,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 05:43:17,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:43:17,108 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 05:43:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:17,292 INFO L93 Difference]: Finished difference Result 1119 states and 1584 transitions. [2022-03-20 05:43:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 05:43:17,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-03-20 05:43:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:17,296 INFO L225 Difference]: With dead ends: 1119 [2022-03-20 05:43:17,296 INFO L226 Difference]: Without dead ends: 1119 [2022-03-20 05:43:17,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-03-20 05:43:17,297 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 222 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:17,297 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 416 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-03-20 05:43:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-03-20 05:43:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-03-20 05:43:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-03-20 05:43:17,341 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-03-20 05:43:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:17,341 INFO L478 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-03-20 05:43:17,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-20 05:43:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-03-20 05:43:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 05:43:17,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:17,341 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-03-20 05:43:17,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:17,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:17,572 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:17,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-03-20 05:43:17,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:17,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214402293] [2022-03-20 05:43:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:17,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:17,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:17,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743983348] [2022-03-20 05:43:17,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:43:17,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:17,604 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) [2022-03-20 05:43:17,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 05:43:17,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:43:17,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:43:17,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 05:43:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-20 05:43:17,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:17,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:17,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214402293] [2022-03-20 05:43:17,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:17,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743983348] [2022-03-20 05:43:17,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743983348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:17,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:17,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:43:17,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163155429] [2022-03-20 05:43:17,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:17,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:43:17,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:17,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:43:17,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:43:17,755 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-03-20 05:43:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:17,803 INFO L93 Difference]: Finished difference Result 1234 states and 1815 transitions. [2022-03-20 05:43:17,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:43:17,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 44 [2022-03-20 05:43:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:17,808 INFO L225 Difference]: With dead ends: 1234 [2022-03-20 05:43:17,808 INFO L226 Difference]: Without dead ends: 1234 [2022-03-20 05:43:17,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 05:43:17,808 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:17,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 195 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-20 05:43:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-03-20 05:43:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-03-20 05:43:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-03-20 05:43:17,837 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-03-20 05:43:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:17,837 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-03-20 05:43:17,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-03-20 05:43:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-03-20 05:43:17,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 05:43:17,838 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:17,838 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1] [2022-03-20 05:43:17,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:18,054 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,SelfDestructingSolverStorable15 [2022-03-20 05:43:18,054 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-03-20 05:43:18,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:18,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685083934] [2022-03-20 05:43:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:18,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:18,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:18,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82078623] [2022-03-20 05:43:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:18,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:18,062 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) [2022-03-20 05:43:18,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 05:43:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:18,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 05:43:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 05:43:18,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 05:43:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685083934] [2022-03-20 05:43:19,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82078623] [2022-03-20 05:43:19,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82078623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:19,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:19,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 05:43:19,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617906618] [2022-03-20 05:43:19,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:19,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 05:43:19,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 05:43:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 05:43:19,132 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 05:43:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:24,354 INFO L93 Difference]: Finished difference Result 1410 states and 2007 transitions. [2022-03-20 05:43:24,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 05:43:24,354 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-03-20 05:43:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:24,359 INFO L225 Difference]: With dead ends: 1410 [2022-03-20 05:43:24,359 INFO L226 Difference]: Without dead ends: 1404 [2022-03-20 05:43:24,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 05:43:24,360 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 175 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:24,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 644 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-20 05:43:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-20 05:43:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-03-20 05:43:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-03-20 05:43:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-03-20 05:43:24,386 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-03-20 05:43:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:24,386 INFO L478 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-03-20 05:43:24,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-20 05:43:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-03-20 05:43:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 05:43:24,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:24,387 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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, 1, 1] [2022-03-20 05:43:24,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:24,587 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,SelfDestructingSolverStorable16 [2022-03-20 05:43:24,587 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-03-20 05:43:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:24,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59202073] [2022-03-20 05:43:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:24,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:24,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:24,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433529432] [2022-03-20 05:43:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:24,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:24,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:24,597 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) [2022-03-20 05:43:24,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 05:43:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:24,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 05:43:24,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 05:43:24,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 05:43:24,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:24,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59202073] [2022-03-20 05:43:24,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:24,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433529432] [2022-03-20 05:43:24,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433529432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:24,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:24,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 05:43:24,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843217472] [2022-03-20 05:43:24,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:24,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 05:43:24,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:24,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 05:43:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:43:24,908 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 05:43:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:25,124 INFO L93 Difference]: Finished difference Result 1292 states and 1758 transitions. [2022-03-20 05:43:25,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 05:43:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-03-20 05:43:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:25,151 INFO L225 Difference]: With dead ends: 1292 [2022-03-20 05:43:25,152 INFO L226 Difference]: Without dead ends: 1292 [2022-03-20 05:43:25,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-03-20 05:43:25,152 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 174 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:25,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 379 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:43:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-03-20 05:43:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1255. [2022-03-20 05:43:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 875 states have (on average 1.2765714285714285) internal successors, (1117), 893 states have internal predecessors, (1117), 307 states have call successors, (307), 73 states have call predecessors, (307), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-03-20 05:43:25,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 1727 transitions. [2022-03-20 05:43:25,176 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 1727 transitions. Word has length 64 [2022-03-20 05:43:25,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:25,176 INFO L478 AbstractCegarLoop]: Abstraction has 1255 states and 1727 transitions. [2022-03-20 05:43:25,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 05:43:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 1727 transitions. [2022-03-20 05:43:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 05:43:25,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:25,177 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:25,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:25,394 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,SelfDestructingSolverStorable17 [2022-03-20 05:43:25,394 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-03-20 05:43:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:25,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492681004] [2022-03-20 05:43:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:25,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:25,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572800144] [2022-03-20 05:43:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:25,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:25,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:25,422 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) [2022-03-20 05:43:25,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 05:43:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 05:43:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 05:43:25,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-20 05:43:25,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:25,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492681004] [2022-03-20 05:43:25,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:25,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572800144] [2022-03-20 05:43:25,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572800144] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 05:43:25,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 05:43:25,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 05:43:25,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921257447] [2022-03-20 05:43:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:25,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:43:25,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:43:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 05:43:25,742 INFO L87 Difference]: Start difference. First operand 1255 states and 1727 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:43:25,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:25,778 INFO L93 Difference]: Finished difference Result 1283 states and 1748 transitions. [2022-03-20 05:43:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 05:43:25,778 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-20 05:43:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:25,782 INFO L225 Difference]: With dead ends: 1283 [2022-03-20 05:43:25,782 INFO L226 Difference]: Without dead ends: 1283 [2022-03-20 05:43:25,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 05:43:25,783 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:25,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-03-20 05:43:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1275. [2022-03-20 05:43:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 890 states have (on average 1.2696629213483146) internal successors, (1130), 908 states have internal predecessors, (1130), 307 states have call successors, (307), 78 states have call predecessors, (307), 77 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-03-20 05:43:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 1740 transitions. [2022-03-20 05:43:25,808 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 1740 transitions. Word has length 67 [2022-03-20 05:43:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:25,808 INFO L478 AbstractCegarLoop]: Abstraction has 1275 states and 1740 transitions. [2022-03-20 05:43:25,808 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), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 05:43:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 1740 transitions. [2022-03-20 05:43:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 05:43:25,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:25,809 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:25,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:26,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:26,027 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-03-20 05:43:26,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:26,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504501789] [2022-03-20 05:43:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:26,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:26,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:26,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640818303] [2022-03-20 05:43:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:26,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:26,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:26,051 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) [2022-03-20 05:43:26,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 05:43:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 05:43:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-20 05:43:26,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 05:43:26,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:26,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504501789] [2022-03-20 05:43:26,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:26,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640818303] [2022-03-20 05:43:26,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640818303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 05:43:26,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 05:43:26,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 05:43:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197067857] [2022-03-20 05:43:26,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 05:43:26,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 05:43:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 05:43:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 05:43:26,200 INFO L87 Difference]: Start difference. First operand 1275 states and 1740 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 05:43:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:26,243 INFO L93 Difference]: Finished difference Result 1325 states and 1781 transitions. [2022-03-20 05:43:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 05:43:26,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-03-20 05:43:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:26,247 INFO L225 Difference]: With dead ends: 1325 [2022-03-20 05:43:26,247 INFO L226 Difference]: Without dead ends: 1325 [2022-03-20 05:43:26,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 05:43:26,248 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:26,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 05:43:26,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-03-20 05:43:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1232. [2022-03-20 05:43:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 885 states have (on average 1.2677966101694915) internal successors, (1122), 888 states have internal predecessors, (1122), 271 states have call successors, (271), 76 states have call predecessors, (271), 75 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2022-03-20 05:43:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1660 transitions. [2022-03-20 05:43:26,274 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1660 transitions. Word has length 73 [2022-03-20 05:43:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:26,275 INFO L478 AbstractCegarLoop]: Abstraction has 1232 states and 1660 transitions. [2022-03-20 05:43:26,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 05:43:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1660 transitions. [2022-03-20 05:43:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 05:43:26,275 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:26,275 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2022-03-20 05:43:26,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:26,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:26,493 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:26,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:26,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-03-20 05:43:26,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:26,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229443430] [2022-03-20 05:43:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:26,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:26,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:26,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946199943] [2022-03-20 05:43:26,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:43:26,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:26,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:26,528 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) [2022-03-20 05:43:26,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 05:43:26,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:43:26,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:43:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 05:43:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 05:43:27,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-20 05:43:28,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:28,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229443430] [2022-03-20 05:43:28,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:28,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946199943] [2022-03-20 05:43:28,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946199943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:28,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:28,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-20 05:43:28,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262247990] [2022-03-20 05:43:28,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:28,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 05:43:28,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 05:43:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-20 05:43:28,857 INFO L87 Difference]: Start difference. First operand 1232 states and 1660 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 05:43:40,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:43:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:43:42,231 INFO L93 Difference]: Finished difference Result 1473 states and 1962 transitions. [2022-03-20 05:43:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 05:43:42,236 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-03-20 05:43:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:43:42,240 INFO L225 Difference]: With dead ends: 1473 [2022-03-20 05:43:42,240 INFO L226 Difference]: Without dead ends: 1469 [2022-03-20 05:43:42,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 05:43:42,241 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 307 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-03-20 05:43:42,241 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 765 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-03-20 05:43:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2022-03-20 05:43:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1416. [2022-03-20 05:43:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1028 states have (on average 1.2752918287937742) internal successors, (1311), 1037 states have internal predecessors, (1311), 298 states have call successors, (298), 91 states have call predecessors, (298), 89 states have return successors, (295), 287 states have call predecessors, (295), 295 states have call successors, (295) [2022-03-20 05:43:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1904 transitions. [2022-03-20 05:43:42,299 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1904 transitions. Word has length 75 [2022-03-20 05:43:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:43:42,299 INFO L478 AbstractCegarLoop]: Abstraction has 1416 states and 1904 transitions. [2022-03-20 05:43:42,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-20 05:43:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1904 transitions. [2022-03-20 05:43:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 05:43:42,301 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:43:42,301 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:43:42,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 05:43:42,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 05:43:42,517 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:43:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:43:42,517 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-03-20 05:43:42,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:43:42,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856613004] [2022-03-20 05:43:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:42,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:43:42,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:43:42,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953541701] [2022-03-20 05:43:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:43:42,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:43:42,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:43:42,539 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) [2022-03-20 05:43:42,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 05:43:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:43:42,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 05:43:42,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:43:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 05:43:43,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:43:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-20 05:43:48,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:43:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856613004] [2022-03-20 05:43:48,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:43:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953541701] [2022-03-20 05:43:48,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953541701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:43:48,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:43:48,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-20 05:43:48,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093998452] [2022-03-20 05:43:48,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:43:48,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 05:43:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:43:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 05:43:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-20 05:43:48,866 INFO L87 Difference]: Start difference. First operand 1416 states and 1904 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 05:43:59,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:03,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:14,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:26,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:35,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:36,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 05:44:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:44:51,866 INFO L93 Difference]: Finished difference Result 1709 states and 2288 transitions. [2022-03-20 05:44:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 05:44:51,867 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-03-20 05:44:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:44:51,871 INFO L225 Difference]: With dead ends: 1709 [2022-03-20 05:44:51,871 INFO L226 Difference]: Without dead ends: 1700 [2022-03-20 05:44:51,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3682 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=1865, Invalid=9265, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 05:44:51,874 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 403 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 529 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2022-03-20 05:44:51,874 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1125 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 1368 Invalid, 2 Unknown, 0 Unchecked, 19.9s Time] [2022-03-20 05:44:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-03-20 05:44:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1545. [2022-03-20 05:44:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1129 states have (on average 1.2816651904340124) internal successors, (1447), 1138 states have internal predecessors, (1447), 318 states have call successors, (318), 99 states have call predecessors, (318), 97 states have return successors, (315), 307 states have call predecessors, (315), 315 states have call successors, (315) [2022-03-20 05:44:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2080 transitions. [2022-03-20 05:44:51,897 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2080 transitions. Word has length 88 [2022-03-20 05:44:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:44:51,897 INFO L478 AbstractCegarLoop]: Abstraction has 1545 states and 2080 transitions. [2022-03-20 05:44:51,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-20 05:44:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2080 transitions. [2022-03-20 05:44:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 05:44:51,898 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:44:51,898 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:44:51,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 05:44:52,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 05:44:52,111 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:44:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:44:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2096647522, now seen corresponding path program 1 times [2022-03-20 05:44:52,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:44:52,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76845122] [2022-03-20 05:44:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:44:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:44:52,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:44:52,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994922161] [2022-03-20 05:44:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:44:52,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:44:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:44:52,123 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:44:52,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 05:44:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 05:44:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 05:44:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:44:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 05:44:52,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:44:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 05:44:52,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:44:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76845122] [2022-03-20 05:44:52,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:44:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994922161] [2022-03-20 05:44:52,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994922161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:44:52,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:44:52,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2022-03-20 05:44:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364345818] [2022-03-20 05:44:52,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:44:52,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 05:44:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:44:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 05:44:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-03-20 05:44:52,550 INFO L87 Difference]: Start difference. First operand 1545 states and 2080 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2022-03-20 05:44:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:44:52,743 INFO L93 Difference]: Finished difference Result 1574 states and 2098 transitions. [2022-03-20 05:44:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 05:44:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 97 [2022-03-20 05:44:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:44:52,748 INFO L225 Difference]: With dead ends: 1574 [2022-03-20 05:44:52,748 INFO L226 Difference]: Without dead ends: 1574 [2022-03-20 05:44:52,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2022-03-20 05:44:52,749 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 219 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 05:44:52,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 319 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 05:44:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-03-20 05:44:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1561. [2022-03-20 05:44:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1145 states have (on average 1.2698689956331877) internal successors, (1454), 1154 states have internal predecessors, (1454), 318 states have call successors, (318), 99 states have call predecessors, (318), 97 states have return successors, (315), 307 states have call predecessors, (315), 315 states have call successors, (315) [2022-03-20 05:44:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 2087 transitions. [2022-03-20 05:44:52,772 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 2087 transitions. Word has length 97 [2022-03-20 05:44:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:44:52,773 INFO L478 AbstractCegarLoop]: Abstraction has 1561 states and 2087 transitions. [2022-03-20 05:44:52,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2022-03-20 05:44:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 2087 transitions. [2022-03-20 05:44:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 05:44:52,774 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:44:52,775 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:44:52,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 05:44:52,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:44:52,991 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:44:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:44:52,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-03-20 05:44:52,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:44:52,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050798812] [2022-03-20 05:44:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:44:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:44:52,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:44:52,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484477440] [2022-03-20 05:44:52,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 05:44:52,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:44:52,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:44:53,001 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:44:53,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 05:44:53,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 05:44:53,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 05:44:53,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 05:44:53,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 05:44:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 05:44:53,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 05:44:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 05:44:53,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 05:44:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050798812] [2022-03-20 05:44:53,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 05:44:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484477440] [2022-03-20 05:44:53,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484477440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 05:44:53,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 05:44:53,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2022-03-20 05:44:53,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484631929] [2022-03-20 05:44:53,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 05:44:53,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 05:44:53,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 05:44:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 05:44:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 05:44:53,426 INFO L87 Difference]: Start difference. First operand 1561 states and 2087 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2022-03-20 05:44:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 05:44:53,592 INFO L93 Difference]: Finished difference Result 1232 states and 1485 transitions. [2022-03-20 05:44:53,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 05:44:53,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) Word has length 97 [2022-03-20 05:44:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 05:44:53,595 INFO L225 Difference]: With dead ends: 1232 [2022-03-20 05:44:53,595 INFO L226 Difference]: Without dead ends: 1232 [2022-03-20 05:44:53,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-03-20 05:44:53,595 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 211 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 05:44:53,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 464 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 05:44:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-03-20 05:44:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 925. [2022-03-20 05:44:53,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 661 states have (on average 1.1225416036308624) internal successors, (742), 669 states have internal predecessors, (742), 167 states have call successors, (167), 98 states have call predecessors, (167), 96 states have return successors, (164), 157 states have call predecessors, (164), 164 states have call successors, (164) [2022-03-20 05:44:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1073 transitions. [2022-03-20 05:44:53,614 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1073 transitions. Word has length 97 [2022-03-20 05:44:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 05:44:53,614 INFO L478 AbstractCegarLoop]: Abstraction has 925 states and 1073 transitions. [2022-03-20 05:44:53,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 5 states have call successors, (23), 5 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 4 states have call successors, (21) [2022-03-20 05:44:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1073 transitions. [2022-03-20 05:44:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 05:44:53,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 05:44:53,615 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:44:53,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 05:44:53,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:44:53,834 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 05:44:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 05:44:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash 672019267, now seen corresponding path program 2 times [2022-03-20 05:44:53,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 05:44:53,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510543814] [2022-03-20 05:44:53,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 05:44:53,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 05:44:53,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 05:44:53,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257438564] [2022-03-20 05:44:53,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 05:44:53,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 05:44:53,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 05:44:53,843 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 05:44:53,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 05:44:53,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 05:44:53,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 05:44:53,907 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 05:44:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 05:44:53,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 05:44:53,976 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 05:44:53,977 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 05:44:54,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 05:44:54,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 05:44:54,181 INFO L719 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 05:44:54,183 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 05:44:54,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 05:44:54 BasicIcfg [2022-03-20 05:44:54,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 05:44:54,230 INFO L158 Benchmark]: Toolchain (without parser) took 105698.09ms. Allocated memory was 174.1MB in the beginning and 329.3MB in the end (delta: 155.2MB). Free memory was 118.8MB in the beginning and 130.7MB in the end (delta: -11.9MB). Peak memory consumption was 143.0MB. Max. memory is 8.0GB. [2022-03-20 05:44:54,230 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 174.1MB. Free memory is still 135.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 05:44:54,230 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.20ms. Allocated memory was 174.1MB in the beginning and 273.7MB in the end (delta: 99.6MB). Free memory was 118.7MB in the beginning and 245.4MB in the end (delta: -126.7MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-03-20 05:44:54,230 INFO L158 Benchmark]: Boogie Preprocessor took 22.16ms. Allocated memory is still 273.7MB. Free memory was 245.4MB in the beginning and 244.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 05:44:54,230 INFO L158 Benchmark]: RCFGBuilder took 216.52ms. Allocated memory is still 273.7MB. Free memory was 243.9MB in the beginning and 231.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 05:44:54,231 INFO L158 Benchmark]: IcfgTransformer took 22.23ms. Allocated memory is still 273.7MB. Free memory was 231.8MB in the beginning and 230.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 05:44:54,231 INFO L158 Benchmark]: TraceAbstraction took 105146.92ms. Allocated memory was 273.7MB in the beginning and 329.3MB in the end (delta: 55.6MB). Free memory was 229.7MB in the beginning and 130.7MB in the end (delta: 99.0MB). Peak memory consumption was 155.6MB. Max. memory is 8.0GB. [2022-03-20 05:44:54,231 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 174.1MB. Free memory is still 135.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 284.20ms. Allocated memory was 174.1MB in the beginning and 273.7MB in the end (delta: 99.6MB). Free memory was 118.7MB in the beginning and 245.4MB in the end (delta: -126.7MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.16ms. Allocated memory is still 273.7MB. Free memory was 245.4MB in the beginning and 244.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 216.52ms. Allocated memory is still 273.7MB. Free memory was 243.9MB in the beginning and 231.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 22.23ms. Allocated memory is still 273.7MB. Free memory was 231.8MB in the beginning and 230.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 105146.92ms. Allocated memory was 273.7MB in the beginning and 329.3MB in the end (delta: 55.6MB). Free memory was 229.7MB in the beginning and 130.7MB in the end (delta: 99.0MB). Peak memory consumption was 155.6MB. 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=13, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=3, y=5] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=3, y=5] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=3, b=5, counter=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=5, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=5, c=3, counter=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=5, c=3, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=5, c=3, counter=2, k=0, p=1, q=0, r=0, s=1, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=3, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=3, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=2, x=3, y=5] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=2, x=3, y=5] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 105.1s, OverallIterations: 25, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 84.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 2647 SdHoareTripleChecker+Valid, 34.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2584 mSDsluCounter, 7767 SdHoareTripleChecker+Invalid, 33.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6331 mSDsCounter, 1924 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5282 IncrementalHoareTripleChecker+Invalid, 7208 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1924 mSolverCounterUnsat, 1436 mSDtfsCounter, 5282 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2114 GetRequests, 1707 SyntacticMatches, 12 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4861 ImplicationChecksByTransitivity, 53.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1561occurred in iteration=23, InterpolantAutomatonStates: 355, 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, 24 MinimizatonAttempts, 1377 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 13.2s InterpolantComputationTime, 1264 NumberOfCodeBlocks, 1239 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1898 ConstructedInterpolants, 0 QuantifiedInterpolants, 10618 SizeOfPredicates, 119 NumberOfNonLiveVariables, 3998 ConjunctsInSsa, 488 ConjunctsInUnsatCore, 37 InterpolantComputations, 12 PerfectInterpolantSequences, 1581/1997 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! [2022-03-20 05:44:54,270 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...