/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/prod4br-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 06:54:54,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 06:54:54,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 06:54:54,082 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 06:54:54,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 06:54:54,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 06:54:54,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 06:54:54,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 06:54:54,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 06:54:54,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 06:54:54,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 06:54:54,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 06:54:54,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 06:54:54,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 06:54:54,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 06:54:54,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 06:54:54,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 06:54:54,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 06:54:54,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 06:54:54,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 06:54:54,108 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 06:54:54,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 06:54:54,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 06:54:54,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 06:54:54,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 06:54:54,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 06:54:54,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 06:54:54,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 06:54:54,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 06:54:54,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 06:54:54,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 06:54:54,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 06:54:54,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 06:54:54,124 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 06:54:54,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 06:54:54,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 06:54:54,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 06:54:54,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 06:54:54,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 06:54:54,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 06:54:54,125 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 06:54:54,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 06:54:54,125 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 06:54:54,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 06:54:54,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 06:54:54,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 06:54:54,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 06:54:54,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 06:54:54,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:54:54,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 06:54:54,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 06:54:54,127 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 06:54:54,127 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 06:54:54,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 06:54:54,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 06:54:54,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 06:54:54,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 06:54:54,308 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 06:54:54,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2022-03-20 06:54:54,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac23d8bc/4d0759610dac454f9caed8df07e15b4b/FLAG767c44460 [2022-03-20 06:54:54,699 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 06:54:54,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2022-03-20 06:54:54,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac23d8bc/4d0759610dac454f9caed8df07e15b4b/FLAG767c44460 [2022-03-20 06:54:55,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac23d8bc/4d0759610dac454f9caed8df07e15b4b [2022-03-20 06:54:55,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 06:54:55,132 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 06:54:55,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 06:54:55,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 06:54:55,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 06:54:55,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2554c154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55, skipping insertion in model container [2022-03-20 06:54:55,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 06:54:55,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 06:54:55,259 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/prod4br-ll_unwindbound50.c[524,537] [2022-03-20 06:54:55,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:54:55,282 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 06:54:55,289 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/prod4br-ll_unwindbound50.c[524,537] [2022-03-20 06:54:55,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 06:54:55,302 INFO L208 MainTranslator]: Completed translation [2022-03-20 06:54:55,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55 WrapperNode [2022-03-20 06:54:55,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 06:54:55,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 06:54:55,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 06:54:55,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 06:54:55,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 06:54:55,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 06:54:55,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 06:54:55,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 06:54:55,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 06:54:55,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:54:55,366 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 06:54:55,367 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 06:54:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 06:54:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 06:54:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 06:54:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 06:54:55,393 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 06:54:55,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 06:54:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 06:54:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 06:54:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 06:54:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 06:54:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 06:54:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 06:54:55,435 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 06:54:55,436 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 06:54:55,537 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 06:54:55,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 06:54:55,541 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 06:54:55,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:54:55 BoogieIcfgContainer [2022-03-20 06:54:55,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 06:54:55,543 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 06:54:55,543 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 06:54:55,548 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 06:54:55,563 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:54:55" (1/1) ... [2022-03-20 06:54:55,564 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 06:54:55,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:54:55 BasicIcfg [2022-03-20 06:54:55,596 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 06:54:55,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 06:54:55,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 06:54:55,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 06:54:55,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:54:55" (1/4) ... [2022-03-20 06:54:55,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd1a4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:54:55, skipping insertion in model container [2022-03-20 06:54:55,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:54:55" (2/4) ... [2022-03-20 06:54:55,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd1a4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:54:55, skipping insertion in model container [2022-03-20 06:54:55,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:54:55" (3/4) ... [2022-03-20 06:54:55,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd1a4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 06:54:55, skipping insertion in model container [2022-03-20 06:54:55,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 06:54:55" (4/4) ... [2022-03-20 06:54:55,602 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound50.cJordan [2022-03-20 06:54:55,605 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 06:54:55,606 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 06:54:55,641 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 06:54:55,645 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 06:54:55,645 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 06:54:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 06:54:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 06:54:55,660 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:54:55,661 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:54:55,661 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:54:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:54:55,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2022-03-20 06:54:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:54:55,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321116571] [2022-03-20 06:54:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:55,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:54:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:54:55,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 06:54:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:54:55,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 06:54:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:54:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:55,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:54:55,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321116571] [2022-03-20 06:54:55,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321116571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:54:55,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:54:55,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 06:54:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192797373] [2022-03-20 06:54:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:54:55,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 06:54:55,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:54:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 06:54:55,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 06:54:55,858 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:54:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:54:55,928 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-03-20 06:54:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 06:54:55,930 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 06:54:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:54:55,935 INFO L225 Difference]: With dead ends: 33 [2022-03-20 06:54:55,935 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 06:54:55,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 06:54:55,938 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:54:55,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:54:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 06:54:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-20 06:54:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 06:54:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-03-20 06:54:55,972 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-03-20 06:54:55,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:54:55,972 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-03-20 06:54:55,972 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:54:55,972 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-03-20 06:54:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 06:54:55,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:54:55,973 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:54:55,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 06:54:55,973 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:54:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:54:55,974 INFO L85 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2022-03-20 06:54:55,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:54:55,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278858422] [2022-03-20 06:54:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:55,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:54:55,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:54:55,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670000375] [2022-03-20 06:54:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:55,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:54:55,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:54:55,996 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 06:54:56,001 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 06:54:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:54:56,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 06:54:56,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:54:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:56,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:54:56,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:54:56,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278858422] [2022-03-20 06:54:56,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:54:56,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670000375] [2022-03-20 06:54:56,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670000375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:54:56,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:54:56,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 06:54:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020477358] [2022-03-20 06:54:56,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:54:56,130 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 06:54:56,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:54:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 06:54:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 06:54:56,131 INFO L87 Difference]: Start difference. First operand 27 states and 33 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:54:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:54:56,139 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-03-20 06:54:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 06:54:56,140 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-20 06:54:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:54:56,140 INFO L225 Difference]: With dead ends: 29 [2022-03-20 06:54:56,140 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 06:54:56,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 06:54:56,141 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:54:56,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:54:56,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 06:54:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 06:54:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 06:54:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-03-20 06:54:56,146 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-03-20 06:54:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:54:56,146 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-03-20 06:54:56,146 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 06:54:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-03-20 06:54:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 06:54:56,147 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:54:56,147 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:54:56,166 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 06:54:56,363 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 06:54:56,364 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:54:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:54:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2022-03-20 06:54:56,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:54:56,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81511851] [2022-03-20 06:54:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:56,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:54:56,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:54:56,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579695988] [2022-03-20 06:54:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:56,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:54:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:54:56,376 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 06:54:56,379 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 06:54:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:54:56,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 06:54:56,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:54:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:56,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:54:56,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:54:56,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81511851] [2022-03-20 06:54:56,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:54:56,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579695988] [2022-03-20 06:54:56,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579695988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:54:56,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:54:56,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 06:54:56,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270275823] [2022-03-20 06:54:56,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:54:56,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:54:56,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:54:56,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:54:56,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 06:54:56,518 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:54:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:54:56,558 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-03-20 06:54:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:54:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-03-20 06:54:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:54:56,559 INFO L225 Difference]: With dead ends: 40 [2022-03-20 06:54:56,559 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 06:54:56,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 06:54:56,560 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:54:56,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:54:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 06:54:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-03-20 06:54:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 06:54:56,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-03-20 06:54:56,566 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-03-20 06:54:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:54:56,566 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-03-20 06:54:56,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 06:54:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-03-20 06:54:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 06:54:56,567 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:54:56,567 INFO L499 BasicCegarLoop]: trace histogram [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 06:54:56,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 06:54:56,771 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 06:54:56,772 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:54:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:54:56,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2022-03-20 06:54:56,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:54:56,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145076468] [2022-03-20 06:54:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:54:56,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:54:56,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74531549] [2022-03-20 06:54:56,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:56,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:54:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:54:56,789 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 06:54:56,827 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 06:54:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:54:56,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 06:54:56,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:54:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:57,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:54:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:57,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:54:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145076468] [2022-03-20 06:54:57,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:54:57,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74531549] [2022-03-20 06:54:57,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74531549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:54:57,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:54:57,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-20 06:54:57,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83486134] [2022-03-20 06:54:57,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:54:57,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 06:54:57,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:54:57,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 06:54:57,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 06:54:57,331 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:54:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:54:57,525 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-20 06:54:57,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 06:54:57,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2022-03-20 06:54:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:54:57,528 INFO L225 Difference]: With dead ends: 53 [2022-03-20 06:54:57,528 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 06:54:57,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-20 06:54:57,529 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:54:57,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 139 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:54:57,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 06:54:57,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-03-20 06:54:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 06:54:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-03-20 06:54:57,534 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2022-03-20 06:54:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:54:57,534 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-03-20 06:54:57,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 06:54:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-03-20 06:54:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 06:54:57,535 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:54:57,535 INFO L499 BasicCegarLoop]: trace histogram [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 06:54:57,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 06:54:57,747 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 06:54:57,748 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:54:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:54:57,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2022-03-20 06:54:57,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:54:57,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546640938] [2022-03-20 06:54:57,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:57,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:54:57,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:54:57,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924067891] [2022-03-20 06:54:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:57,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:54:57,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:54:57,769 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 06:54:57,769 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 06:54:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:54:57,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 06:54:57,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:54:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:57,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:54:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:57,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:54:57,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546640938] [2022-03-20 06:54:57,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:54:57,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924067891] [2022-03-20 06:54:57,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924067891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:54:57,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:54:57,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 06:54:57,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459725120] [2022-03-20 06:54:57,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:54:57,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 06:54:57,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:54:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 06:54:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 06:54:57,915 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 06:54:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:54:57,972 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2022-03-20 06:54:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 06:54:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-03-20 06:54:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:54:57,974 INFO L225 Difference]: With dead ends: 95 [2022-03-20 06:54:57,974 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 06:54:57,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:54:57,974 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:54:57,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 180 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:54:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 06:54:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-03-20 06:54:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 64 states have internal predecessors, (80), 16 states have call successors, (16), 12 states have call predecessors, (16), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 06:54:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-03-20 06:54:57,988 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 27 [2022-03-20 06:54:57,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:54:57,988 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-03-20 06:54:57,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 06:54:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-03-20 06:54:57,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 06:54:57,989 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:54:57,989 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] [2022-03-20 06:54:58,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 06:54:58,189 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 06:54:58,190 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:54:58,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:54:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2022-03-20 06:54:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:54:58,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350997144] [2022-03-20 06:54:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:58,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:54:58,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:54:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747890172] [2022-03-20 06:54:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:54:58,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:54:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:54:58,203 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 06:54:58,206 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 06:54:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:54:58,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 06:54:58,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:54:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:58,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:54:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:54:59,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:54:59,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350997144] [2022-03-20 06:54:59,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:54:59,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747890172] [2022-03-20 06:54:59,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747890172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:54:59,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:54:59,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-03-20 06:54:59,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391130532] [2022-03-20 06:54:59,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:54:59,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 06:54:59,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:54:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 06:54:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-20 06:54:59,758 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 06:55:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:55:01,131 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2022-03-20 06:55:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 06:55:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-03-20 06:55:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:55:01,133 INFO L225 Difference]: With dead ends: 125 [2022-03-20 06:55:01,133 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 06:55:01,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-03-20 06:55:01,133 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:55:01,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 243 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 06:55:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 06:55:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2022-03-20 06:55:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 states have internal predecessors, (75), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 06:55:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-03-20 06:55:01,140 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 27 [2022-03-20 06:55:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:55:01,140 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-03-20 06:55:01,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 06:55:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-03-20 06:55:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 06:55:01,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:55:01,141 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:55:01,157 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 06:55:01,357 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 06:55:01,358 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:55:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:55:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -410392694, now seen corresponding path program 1 times [2022-03-20 06:55:01,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:55:01,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570697006] [2022-03-20 06:55:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:01,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:55:01,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:55:01,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351745984] [2022-03-20 06:55:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:01,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:55:01,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:55:01,367 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 06:55:01,368 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 06:55:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:55:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 06:55:01,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:55:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 06:55:01,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:55:01,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:55:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570697006] [2022-03-20 06:55:01,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:55:01,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351745984] [2022-03-20 06:55:01,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351745984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:55:01,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:55:01,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 06:55:01,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6569554] [2022-03-20 06:55:01,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:55:01,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 06:55:01,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:55:01,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 06:55:01,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-20 06:55:01,456 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 06:55:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:55:01,523 INFO L93 Difference]: Finished difference Result 114 states and 148 transitions. [2022-03-20 06:55:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 06:55:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-03-20 06:55:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:55:01,525 INFO L225 Difference]: With dead ends: 114 [2022-03-20 06:55:01,525 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 06:55:01,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 06:55:01,526 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:55:01,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 157 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:55:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 06:55:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-03-20 06:55:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 76 states have internal predecessors, (98), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 06:55:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2022-03-20 06:55:01,532 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 29 [2022-03-20 06:55:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:55:01,532 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2022-03-20 06:55:01,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 06:55:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2022-03-20 06:55:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 06:55:01,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:55:01,533 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:55:01,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 06:55:01,752 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 06:55:01,752 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:55:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:55:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 159893073, now seen corresponding path program 1 times [2022-03-20 06:55:01,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:55:01,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198798323] [2022-03-20 06:55:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:55:01,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:55:01,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439884063] [2022-03-20 06:55:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:01,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:55:01,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:55:01,767 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 06:55:01,783 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 06:55:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:55:01,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 06:55:01,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:55:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:55:01,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 06:55:01,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:55:01,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198798323] [2022-03-20 06:55:01,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:55:01,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439884063] [2022-03-20 06:55:01,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439884063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 06:55:01,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 06:55:01,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 06:55:01,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931423860] [2022-03-20 06:55:01,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:55:01,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 06:55:01,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:55:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 06:55:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-20 06:55:01,891 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 06:55:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:55:01,927 INFO L93 Difference]: Finished difference Result 139 states and 177 transitions. [2022-03-20 06:55:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 06:55:01,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-03-20 06:55:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:55:01,929 INFO L225 Difference]: With dead ends: 139 [2022-03-20 06:55:01,929 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 06:55:01,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-20 06:55:01,929 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 06:55:01,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 123 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 06:55:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 06:55:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2022-03-20 06:55:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 87 states have internal predecessors, (110), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 06:55:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2022-03-20 06:55:01,951 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 40 [2022-03-20 06:55:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:55:01,951 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2022-03-20 06:55:01,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-20 06:55:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2022-03-20 06:55:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 06:55:01,954 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:55:01,955 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:55:01,973 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 06:55:02,167 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 06:55:02,168 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:55:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:55:02,168 INFO L85 PathProgramCache]: Analyzing trace with hash -837179280, now seen corresponding path program 1 times [2022-03-20 06:55:02,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:55:02,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203662425] [2022-03-20 06:55:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:02,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:55:02,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:55:02,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433770223] [2022-03-20 06:55:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:02,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:55:02,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:55:02,176 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 06:55:02,177 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 06:55:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 06:55:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 06:55:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:55:02,321 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 06:55:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 06:55:02,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:55:02,427 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 06:55:02,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:55:02,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203662425] [2022-03-20 06:55:02,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:55:02,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433770223] [2022-03-20 06:55:02,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433770223] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 06:55:02,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 06:55:02,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 06:55:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635694628] [2022-03-20 06:55:02,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 06:55:02,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 06:55:02,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:55:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 06:55:02,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-20 06:55:02,429 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:55:02,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:55:02,535 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-03-20 06:55:02,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 06:55:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-03-20 06:55:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:55:02,536 INFO L225 Difference]: With dead ends: 118 [2022-03-20 06:55:02,536 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 06:55:02,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-03-20 06:55:02,537 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:55:02,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:55:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 06:55:02,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2022-03-20 06:55:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 06:55:02,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-03-20 06:55:02,543 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 40 [2022-03-20 06:55:02,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:55:02,544 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-03-20 06:55:02,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 06:55:02,544 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-03-20 06:55:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 06:55:02,544 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:55:02,545 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:55:02,563 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 06:55:02,761 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 06:55:02,761 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:55:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:55:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1169624165, now seen corresponding path program 2 times [2022-03-20 06:55:02,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:55:02,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153750646] [2022-03-20 06:55:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:02,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:55:02,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:55:02,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216950982] [2022-03-20 06:55:02,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 06:55:02,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:55:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:55:02,771 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 06:55:02,772 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 06:55:02,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 06:55:02,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:55:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 06:55:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:55:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:55:02,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:55:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 06:55:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:55:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153750646] [2022-03-20 06:55:03,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:55:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216950982] [2022-03-20 06:55:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216950982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:55:03,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:55:03,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 06:55:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752395817] [2022-03-20 06:55:03,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:55:03,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 06:55:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:55:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 06:55:03,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 06:55:03,034 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 06:55:03,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:55:03,153 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2022-03-20 06:55:03,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 06:55:03,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 54 [2022-03-20 06:55:03,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:55:03,154 INFO L225 Difference]: With dead ends: 132 [2022-03-20 06:55:03,154 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 06:55:03,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-20 06:55:03,155 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 168 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:55:03,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 256 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:55:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 06:55:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-03-20 06:55:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 104 states have internal predecessors, (135), 15 states have call successors, (15), 14 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 06:55:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2022-03-20 06:55:03,159 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 54 [2022-03-20 06:55:03,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:55:03,160 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2022-03-20 06:55:03,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 06:55:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2022-03-20 06:55:03,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 06:55:03,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:55:03,161 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:55:03,179 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 06:55:03,363 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 06:55:03,363 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:55:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:55:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash 93180219, now seen corresponding path program 3 times [2022-03-20 06:55:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:55:03,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308358341] [2022-03-20 06:55:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:55:03,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:55:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661900713] [2022-03-20 06:55:03,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 06:55:03,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:55:03,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:55:03,379 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 06:55:03,380 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 06:55:03,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-20 06:55:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:55:03,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 06:55:03,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:55:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:55:03,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:55:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-20 06:55:04,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:55:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308358341] [2022-03-20 06:55:04,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:55:04,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661900713] [2022-03-20 06:55:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661900713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:55:04,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:55:04,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 06:55:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471153256] [2022-03-20 06:55:04,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:55:04,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 06:55:04,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:55:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 06:55:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 06:55:04,071 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 06:55:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:55:04,416 INFO L93 Difference]: Finished difference Result 264 states and 331 transitions. [2022-03-20 06:55:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 06:55:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 108 [2022-03-20 06:55:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:55:04,418 INFO L225 Difference]: With dead ends: 264 [2022-03-20 06:55:04,418 INFO L226 Difference]: Without dead ends: 264 [2022-03-20 06:55:04,418 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 06:55:04,419 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 480 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 06:55:04,419 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 396 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 06:55:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-20 06:55:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-03-20 06:55:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 211 states have (on average 1.3222748815165877) internal successors, (279), 212 states have internal predecessors, (279), 27 states have call successors, (27), 26 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 06:55:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2022-03-20 06:55:04,425 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 108 [2022-03-20 06:55:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:55:04,425 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2022-03-20 06:55:04,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 06:55:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2022-03-20 06:55:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-03-20 06:55:04,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:55:04,427 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:55:04,445 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 06:55:04,645 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 06:55:04,645 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:55:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:55:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash -477485957, now seen corresponding path program 4 times [2022-03-20 06:55:04,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:55:04,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454655796] [2022-03-20 06:55:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:04,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:55:04,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:55:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966239508] [2022-03-20 06:55:04,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 06:55:04,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:55:04,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:55:04,659 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 06:55:04,660 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 06:55:04,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 06:55:04,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 06:55:04,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 06:55:04,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 06:55:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 06:55:05,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 06:55:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-20 06:55:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 06:55:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454655796] [2022-03-20 06:55:06,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 06:55:06,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966239508] [2022-03-20 06:55:06,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966239508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 06:55:06,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 06:55:06,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 06:55:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224074170] [2022-03-20 06:55:06,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 06:55:06,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 06:55:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 06:55:06,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 06:55:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 06:55:06,211 INFO L87 Difference]: Start difference. First operand 264 states and 331 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-20 06:55:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 06:55:07,295 INFO L93 Difference]: Finished difference Result 528 states and 667 transitions. [2022-03-20 06:55:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 06:55:07,296 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 216 [2022-03-20 06:55:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 06:55:07,298 INFO L225 Difference]: With dead ends: 528 [2022-03-20 06:55:07,298 INFO L226 Difference]: Without dead ends: 528 [2022-03-20 06:55:07,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 06:55:07,300 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 1134 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 06:55:07,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 642 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 06:55:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-03-20 06:55:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2022-03-20 06:55:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 427 states have (on average 1.3278688524590163) internal successors, (567), 428 states have internal predecessors, (567), 51 states have call successors, (51), 50 states have call predecessors, (51), 49 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 06:55:07,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-03-20 06:55:07,317 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 216 [2022-03-20 06:55:07,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 06:55:07,318 INFO L478 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-03-20 06:55:07,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-20 06:55:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-03-20 06:55:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-03-20 06:55:07,323 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 06:55:07,323 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 06:55:07,344 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 06:55:07,539 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 06:55:07,539 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 06:55:07,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 06:55:07,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1977953019, now seen corresponding path program 5 times [2022-03-20 06:55:07,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 06:55:07,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764006164] [2022-03-20 06:55:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 06:55:07,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 06:55:07,562 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 06:55:07,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101613159] [2022-03-20 06:55:07,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 06:55:07,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 06:55:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 06:55:07,563 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 06:55:07,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process