/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 21:30:53,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 21:30:53,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 21:30:53,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 21:30:53,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 21:30:53,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 21:30:53,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 21:30:53,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 21:30:53,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 21:30:53,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 21:30:53,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 21:30:53,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 21:30:53,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 21:30:53,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 21:30:53,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 21:30:53,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 21:30:53,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 21:30:53,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 21:30:53,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 21:30:53,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 21:30:53,323 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 21:30:53,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 21:30:53,325 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 21:30:53,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 21:30:53,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 21:30:53,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 21:30:53,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 21:30:53,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 21:30:53,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 21:30:53,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 21:30:53,369 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 21:30:53,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 21:30:53,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 21:30:53,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 21:30:53,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 21:30:53,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 21:30:53,372 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 21:30:53,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 21:30:53,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 21:30:53,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 21:30:53,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 21:30:53,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 21:30:53,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 21:30:53,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 21:30:53,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 21:30:53,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 21:30:53,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 21:30:53,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 21:30:53,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 21:30:53,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:30:53,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 21:30:53,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 21:30:53,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 21:30:53,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 21:30:53,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 21:30:53,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 21:30:53,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 21:30:53,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 21:30:53,377 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 21:30:53,377 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 21:30:53,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 21:30:53,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 21:30:53,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 21:30:53,642 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 21:30:53,643 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 21:30:53,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-03-17 21:30:53,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbd43855a/8e1fbd97aea9449d8bca9373de5eacb7/FLAG794ed4b73 [2022-03-17 21:30:54,084 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 21:30:54,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-03-17 21:30:54,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbd43855a/8e1fbd97aea9449d8bca9373de5eacb7/FLAG794ed4b73 [2022-03-17 21:30:54,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbd43855a/8e1fbd97aea9449d8bca9373de5eacb7 [2022-03-17 21:30:54,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 21:30:54,111 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 21:30:54,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 21:30:54,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 21:30:54,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 21:30:54,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65d91980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54, skipping insertion in model container [2022-03-17 21:30:54,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 21:30:54,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 21:30:54,321 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2022-03-17 21:30:54,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:30:54,363 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 21:30:54,375 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2022-03-17 21:30:54,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:30:54,405 INFO L208 MainTranslator]: Completed translation [2022-03-17 21:30:54,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54 WrapperNode [2022-03-17 21:30:54,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 21:30:54,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 21:30:54,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 21:30:54,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 21:30:54,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 21:30:54,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 21:30:54,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 21:30:54,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 21:30:54,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:30:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:54,480 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) [2022-03-17 21:30:54,504 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 [2022-03-17 21:30:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 21:30:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 21:30:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 21:30:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 21:30:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 21:30:54,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 21:30:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 21:30:54,526 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 21:30:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 21:30:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 21:30:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 21:30:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 21:30:54,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 21:30:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 21:30:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 21:30:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 21:30:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 21:30:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 21:30:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 21:30:54,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 21:30:54,588 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 21:30:54,590 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 21:30:54,772 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 21:30:54,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 21:30:54,777 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 21:30:54,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:30:54 BoogieIcfgContainer [2022-03-17 21:30:54,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 21:30:54,779 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 21:30:54,779 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 21:30:54,780 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 21:30:54,783 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:30:54" (1/1) ... [2022-03-17 21:30:54,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:30:54 BasicIcfg [2022-03-17 21:30:54,796 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 21:30:54,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 21:30:54,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 21:30:54,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 21:30:54,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:30:54" (1/4) ... [2022-03-17 21:30:54,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d59c25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:30:54, skipping insertion in model container [2022-03-17 21:30:54,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:54" (2/4) ... [2022-03-17 21:30:54,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d59c25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:30:54, skipping insertion in model container [2022-03-17 21:30:54,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:30:54" (3/4) ... [2022-03-17 21:30:54,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d59c25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:30:54, skipping insertion in model container [2022-03-17 21:30:54,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:30:54" (4/4) ... [2022-03-17 21:30:54,802 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.cqvasr [2022-03-17 21:30:54,806 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 21:30:54,807 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 21:30:54,840 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 21:30:54,845 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-03-17 21:30:54,846 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 21:30:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 21:30:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 21:30:54,862 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:54,862 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:54,862 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-03-17 21:30:54,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927580679] [2022-03-17 21:30:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:54,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:55,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:30:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:55,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:30:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:55,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 21:30:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:55,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 21:30:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:55,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-17 21:30:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:30:55,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927580679] [2022-03-17 21:30:55,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927580679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:55,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:55,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:30:55,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85974395] [2022-03-17 21:30:55,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:55,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:30:55,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:30:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:30:55,127 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:30:55,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:55,227 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-17 21:30:55,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:30:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 21:30:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:55,236 INFO L225 Difference]: With dead ends: 73 [2022-03-17 21:30:55,236 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 21:30:55,239 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:30:55,243 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:55,248 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 21:30:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 21:30:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 21:30:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-17 21:30:55,292 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-17 21:30:55,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:55,292 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-17 21:30:55,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:30:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-17 21:30:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 21:30:55,296 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:55,296 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:55,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 21:30:55,297 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-03-17 21:30:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:55,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886835104] [2022-03-17 21:30:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:55,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:55,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327885346] [2022-03-17 21:30:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:55,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:55,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:55,353 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) [2022-03-17 21:30:55,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 21:30:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:30:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:30:55,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:55,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886835104] [2022-03-17 21:30:55,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:55,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327885346] [2022-03-17 21:30:55,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327885346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:55,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:55,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 21:30:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069047457] [2022-03-17 21:30:55,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:55,598 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:30:55,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:30:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:30:55,621 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:30:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:55,725 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-17 21:30:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:30:55,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-17 21:30:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:55,727 INFO L225 Difference]: With dead ends: 54 [2022-03-17 21:30:55,727 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 21:30:55,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:30:55,729 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:55,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:55,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 21:30:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-17 21:30:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 21:30:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-17 21:30:55,740 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-17 21:30:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:55,741 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-17 21:30:55,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:30:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-17 21:30:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 21:30:55,742 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:55,742 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:55,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:55,945 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 [2022-03-17 21:30:55,945 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:55,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:55,946 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-03-17 21:30:55,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:55,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917840685] [2022-03-17 21:30:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:55,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:55,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:55,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269074207] [2022-03-17 21:30:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:55,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:55,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:55,988 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) [2022-03-17 21:30:55,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 21:30:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:56,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 21:30:56,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:30:56,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:30:56,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:56,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917840685] [2022-03-17 21:30:56,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269074207] [2022-03-17 21:30:56,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269074207] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:30:56,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:30:56,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 21:30:56,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678611114] [2022-03-17 21:30:56,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:56,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:30:56,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:56,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:30:56,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:30:56,464 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:30:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:56,509 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-17 21:30:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:30:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-17 21:30:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:56,511 INFO L225 Difference]: With dead ends: 53 [2022-03-17 21:30:56,511 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 21:30:56,512 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:30:56,513 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:56,513 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 21:30:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-17 21:30:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 21:30:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-17 21:30:56,535 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-17 21:30:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:56,535 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-17 21:30:56,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:30:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-17 21:30:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 21:30:56,536 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:56,537 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:56,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:56,737 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 [2022-03-17 21:30:56,738 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:56,739 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-03-17 21:30:56,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:56,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272750600] [2022-03-17 21:30:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:56,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:56,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:56,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197396682] [2022-03-17 21:30:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:56,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:56,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:56,752 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) [2022-03-17 21:30:56,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 21:30:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:56,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:30:56,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:30:56,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:30:57,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:57,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272750600] [2022-03-17 21:30:57,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:57,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197396682] [2022-03-17 21:30:57,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197396682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:57,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:57,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 21:30:57,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268348587] [2022-03-17 21:30:57,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:57,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 21:30:57,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:57,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 21:30:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:30:57,066 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:30:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:57,249 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-17 21:30:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 21:30:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-17 21:30:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:57,254 INFO L225 Difference]: With dead ends: 103 [2022-03-17 21:30:57,257 INFO L226 Difference]: Without dead ends: 96 [2022-03-17 21:30:57,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:30:57,258 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:57,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-17 21:30:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-17 21:30:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 21:30:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-17 21:30:57,278 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-17 21:30:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:57,278 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-17 21:30:57,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:30:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-17 21:30:57,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 21:30:57,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:57,280 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:57,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:57,502 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 [2022-03-17 21:30:57,503 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:57,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-03-17 21:30:57,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:57,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340037257] [2022-03-17 21:30:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:57,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:57,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049415140] [2022-03-17 21:30:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:57,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:57,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:57,543 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) [2022-03-17 21:30:57,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 21:30:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:57,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 21:30:57,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:30:57,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:30:58,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340037257] [2022-03-17 21:30:58,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049415140] [2022-03-17 21:30:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049415140] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:30:58,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:30:58,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-17 21:30:58,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166869450] [2022-03-17 21:30:58,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:58,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 21:30:58,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 21:30:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:30:58,105 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:30:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:58,160 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-17 21:30:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 21:30:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-17 21:30:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:58,161 INFO L225 Difference]: With dead ends: 79 [2022-03-17 21:30:58,161 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 21:30:58,162 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-17 21:30:58,162 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:58,163 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 21:30:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-17 21:30:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 21:30:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-17 21:30:58,174 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-17 21:30:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:58,174 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-17 21:30:58,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:30:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-17 21:30:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 21:30:58,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:58,176 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:58,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:58,391 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 [2022-03-17 21:30:58,391 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-03-17 21:30:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:58,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995724889] [2022-03-17 21:30:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:58,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:58,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922996338] [2022-03-17 21:30:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:58,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:58,420 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) [2022-03-17 21:30:58,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 21:30:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:58,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-17 21:30:58,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 21:30:58,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:30:59,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:59,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995724889] [2022-03-17 21:30:59,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:59,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922996338] [2022-03-17 21:30:59,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922996338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:59,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:59,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-17 21:30:59,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126909518] [2022-03-17 21:30:59,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:59,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:30:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:30:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:30:59,014 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 21:30:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:59,447 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-03-17 21:30:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 21:30:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-03-17 21:30:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:59,449 INFO L225 Difference]: With dead ends: 118 [2022-03-17 21:30:59,449 INFO L226 Difference]: Without dead ends: 116 [2022-03-17 21:30:59,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-17 21:30:59,450 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:59,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:30:59,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-17 21:30:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-17 21:30:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 21:30:59,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-17 21:30:59,475 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-17 21:30:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:59,475 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-17 21:30:59,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 21:30:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-17 21:30:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:30:59,483 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:59,483 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:59,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:59,684 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 [2022-03-17 21:30:59,684 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-03-17 21:30:59,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:59,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888013893] [2022-03-17 21:30:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:59,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:59,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:59,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798365645] [2022-03-17 21:30:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:59,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:59,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:59,697 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) [2022-03-17 21:30:59,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 21:30:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:59,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:30:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 21:30:59,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:59,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888013893] [2022-03-17 21:30:59,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798365645] [2022-03-17 21:30:59,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798365645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:59,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:59,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:30:59,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335144124] [2022-03-17 21:30:59,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:59,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:30:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:30:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:30:59,824 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:30:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:59,879 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-03-17 21:30:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:30:59,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-17 21:30:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:59,881 INFO L225 Difference]: With dead ends: 151 [2022-03-17 21:30:59,881 INFO L226 Difference]: Without dead ends: 149 [2022-03-17 21:30:59,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:30:59,882 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:59,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-17 21:30:59,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-17 21:30:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-17 21:30:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-17 21:30:59,912 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-17 21:30:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:59,912 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-17 21:30:59,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:30:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-17 21:30:59,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:30:59,913 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:59,913 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:59,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 21:31:00,136 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 [2022-03-17 21:31:00,136 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-03-17 21:31:00,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:00,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319554860] [2022-03-17 21:31:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:00,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:00,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:00,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797418373] [2022-03-17 21:31:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:00,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:00,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:00,152 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) [2022-03-17 21:31:00,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 21:31:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:31:00,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 21:31:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 21:31:00,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:31:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:31:00,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:00,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319554860] [2022-03-17 21:31:00,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:00,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797418373] [2022-03-17 21:31:00,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797418373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:31:00,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:31:00,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-03-17 21:31:00,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507259777] [2022-03-17 21:31:00,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:31:00,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 21:31:00,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 21:31:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-17 21:31:00,738 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 21:31:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:03,719 INFO L93 Difference]: Finished difference Result 190 states and 265 transitions. [2022-03-17 21:31:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 21:31:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-03-17 21:31:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:03,723 INFO L225 Difference]: With dead ends: 190 [2022-03-17 21:31:03,723 INFO L226 Difference]: Without dead ends: 188 [2022-03-17 21:31:03,724 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-03-17 21:31:03,724 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:03,725 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 288 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-17 21:31:03,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-17 21:31:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-03-17 21:31:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-17 21:31:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-03-17 21:31:03,760 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-03-17 21:31:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:31:03,760 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-03-17 21:31:03,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 21:31:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-03-17 21:31:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 21:31:03,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:31:03,761 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:31:03,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 21:31:03,975 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 [2022-03-17 21:31:03,975 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:03,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-03-17 21:31:03,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:03,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794577656] [2022-03-17 21:31:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:03,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:03,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:03,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659024807] [2022-03-17 21:31:03,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:31:03,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:03,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:03,987 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) [2022-03-17 21:31:03,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 21:31:04,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:31:04,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:31:04,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:31:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 21:31:04,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:31:04,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:04,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794577656] [2022-03-17 21:31:04,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:04,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659024807] [2022-03-17 21:31:04,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659024807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:31:04,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:31:04,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:31:04,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500155657] [2022-03-17 21:31:04,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:31:04,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:31:04,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:31:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:31:04,116 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:31:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:04,193 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2022-03-17 21:31:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:31:04,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-17 21:31:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:04,195 INFO L225 Difference]: With dead ends: 225 [2022-03-17 21:31:04,195 INFO L226 Difference]: Without dead ends: 144 [2022-03-17 21:31:04,196 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 21:31:04,197 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:04,197 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:31:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-17 21:31:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-17 21:31:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-17 21:31:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-03-17 21:31:04,218 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-03-17 21:31:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:31:04,219 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-03-17 21:31:04,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 21:31:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-03-17 21:31:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-17 21:31:04,221 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:31:04,221 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:31:04,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-17 21:31:04,423 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 [2022-03-17 21:31:04,424 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-03-17 21:31:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:04,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439340382] [2022-03-17 21:31:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:04,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:04,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317000538] [2022-03-17 21:31:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:04,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:04,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:04,444 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) [2022-03-17 21:31:04,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 21:31:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:31:04,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:31:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 21:31:04,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:31:04,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:04,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439340382] [2022-03-17 21:31:04,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:04,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317000538] [2022-03-17 21:31:04,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317000538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:31:04,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:31:04,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:31:04,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888601286] [2022-03-17 21:31:04,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:31:04,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:31:04,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:04,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:31:04,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:31:04,590 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:31:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:04,649 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2022-03-17 21:31:04,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:31:04,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-17 21:31:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:04,651 INFO L225 Difference]: With dead ends: 167 [2022-03-17 21:31:04,651 INFO L226 Difference]: Without dead ends: 165 [2022-03-17 21:31:04,652 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:31:04,652 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:04,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:31:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-17 21:31:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-03-17 21:31:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-17 21:31:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-03-17 21:31:04,682 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-03-17 21:31:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:31:04,682 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-03-17 21:31:04,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 21:31:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-03-17 21:31:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 21:31:04,683 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:31:04,683 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:31:04,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 21:31:04,895 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 [2022-03-17 21:31:04,896 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-03-17 21:31:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418508435] [2022-03-17 21:31:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:04,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:04,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:04,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191990692] [2022-03-17 21:31:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:04,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:04,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:04,910 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) [2022-03-17 21:31:04,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 21:31:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:31:04,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-17 21:31:04,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-17 21:31:05,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:31:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-17 21:31:06,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:06,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418508435] [2022-03-17 21:31:06,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:06,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191990692] [2022-03-17 21:31:06,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191990692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:31:06,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:31:06,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-17 21:31:06,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049316974] [2022-03-17 21:31:06,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:31:06,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-17 21:31:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-17 21:31:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-17 21:31:06,047 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 21:31:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:11,925 INFO L93 Difference]: Finished difference Result 294 states and 426 transitions. [2022-03-17 21:31:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-17 21:31:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-03-17 21:31:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:11,927 INFO L225 Difference]: With dead ends: 294 [2022-03-17 21:31:11,927 INFO L226 Difference]: Without dead ends: 290 [2022-03-17 21:31:11,928 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-03-17 21:31:11,929 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 134 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:11,929 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 462 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-17 21:31:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-17 21:31:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2022-03-17 21:31:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 151 states have internal predecessors, (170), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-17 21:31:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 338 transitions. [2022-03-17 21:31:11,999 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 338 transitions. Word has length 64 [2022-03-17 21:31:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:31:12,002 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 338 transitions. [2022-03-17 21:31:12,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-17 21:31:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 338 transitions. [2022-03-17 21:31:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-17 21:31:12,004 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:31:12,004 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:31:12,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 21:31:12,223 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 [2022-03-17 21:31:12,224 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-03-17 21:31:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:12,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295595537] [2022-03-17 21:31:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:12,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:12,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:12,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582512399] [2022-03-17 21:31:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:12,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:12,238 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) [2022-03-17 21:31:12,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 21:31:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:31:12,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 21:31:12,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-17 21:31:12,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:31:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-17 21:31:12,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:12,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295595537] [2022-03-17 21:31:12,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582512399] [2022-03-17 21:31:12,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582512399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:31:12,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:31:12,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-03-17 21:31:12,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233160283] [2022-03-17 21:31:12,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:31:12,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:31:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:12,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:31:12,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:31:12,606 INFO L87 Difference]: Start difference. First operand 243 states and 338 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-17 21:31:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:12,814 INFO L93 Difference]: Finished difference Result 347 states and 502 transitions. [2022-03-17 21:31:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 21:31:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 74 [2022-03-17 21:31:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:12,817 INFO L225 Difference]: With dead ends: 347 [2022-03-17 21:31:12,817 INFO L226 Difference]: Without dead ends: 345 [2022-03-17 21:31:12,818 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:31:12,818 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:12,818 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 275 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:31:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-17 21:31:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-03-17 21:31:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 154 states have internal predecessors, (173), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-17 21:31:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2022-03-17 21:31:12,894 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 74 [2022-03-17 21:31:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:31:12,895 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2022-03-17 21:31:12,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-17 21:31:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2022-03-17 21:31:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 21:31:12,896 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:31:12,896 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:31:12,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 21:31:13,107 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 [2022-03-17 21:31:13,107 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:13,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-03-17 21:31:13,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:13,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84921836] [2022-03-17 21:31:13,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:13,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:13,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:13,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120386053] [2022-03-17 21:31:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:13,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:13,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:13,130 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) [2022-03-17 21:31:13,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 21:31:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:31:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-17 21:31:13,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 21:31:13,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:31:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 21:31:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84921836] [2022-03-17 21:31:13,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120386053] [2022-03-17 21:31:13,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120386053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:31:13,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:31:13,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-17 21:31:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288092770] [2022-03-17 21:31:13,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:31:13,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 21:31:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 21:31:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-17 21:31:13,650 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:31:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:14,054 INFO L93 Difference]: Finished difference Result 323 states and 453 transitions. [2022-03-17 21:31:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 21:31:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-03-17 21:31:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:14,057 INFO L225 Difference]: With dead ends: 323 [2022-03-17 21:31:14,057 INFO L226 Difference]: Without dead ends: 321 [2022-03-17 21:31:14,057 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-17 21:31:14,058 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 80 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:14,058 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 294 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 21:31:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-17 21:31:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 259. [2022-03-17 21:31:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 163 states have internal predecessors, (182), 85 states have call successors, (85), 19 states have call predecessors, (85), 18 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-17 21:31:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 350 transitions. [2022-03-17 21:31:14,125 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 350 transitions. Word has length 72 [2022-03-17 21:31:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:31:14,125 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 350 transitions. [2022-03-17 21:31:14,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:31:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 350 transitions. [2022-03-17 21:31:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 21:31:14,127 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:31:14,127 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:31:14,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 21:31:14,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 21:31:14,344 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:14,344 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-03-17 21:31:14,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:14,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738295999] [2022-03-17 21:31:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:14,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:14,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:14,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476922830] [2022-03-17 21:31:14,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:31:14,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:14,360 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:31:14,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 21:31:14,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:31:14,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:31:14,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 21:31:14,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 21:31:14,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:31:14,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:14,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738295999] [2022-03-17 21:31:14,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:14,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476922830] [2022-03-17 21:31:14,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476922830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:31:14,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:31:14,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:31:14,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087115925] [2022-03-17 21:31:14,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:31:14,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:31:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:31:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:31:14,511 INFO L87 Difference]: Start difference. First operand 259 states and 350 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 21:31:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:14,639 INFO L93 Difference]: Finished difference Result 449 states and 606 transitions. [2022-03-17 21:31:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:31:14,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-17 21:31:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:14,641 INFO L225 Difference]: With dead ends: 449 [2022-03-17 21:31:14,641 INFO L226 Difference]: Without dead ends: 264 [2022-03-17 21:31:14,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:31:14,643 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:14,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:31:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-17 21:31:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2022-03-17 21:31:14,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 160 states have (on average 1.16875) internal successors, (187), 162 states have internal predecessors, (187), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-17 21:31:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2022-03-17 21:31:14,727 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 77 [2022-03-17 21:31:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:31:14,727 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2022-03-17 21:31:14,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 21:31:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2022-03-17 21:31:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 21:31:14,729 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:31:14,729 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:31:14,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 21:31:14,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 21:31:14,943 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-03-17 21:31:14,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:14,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384303616] [2022-03-17 21:31:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:14,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:14,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217797206] [2022-03-17 21:31:14,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:31:14,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:14,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:14,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:31:14,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 21:31:15,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 21:31:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:31:15,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-17 21:31:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 21:31:15,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:31:17,255 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:31:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 21:31:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:23,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384303616] [2022-03-17 21:31:23,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:23,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217797206] [2022-03-17 21:31:23,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217797206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:31:23,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:31:23,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-17 21:31:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461457336] [2022-03-17 21:31:23,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:31:23,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-17 21:31:23,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-17 21:31:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2022-03-17 21:31:23,423 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-17 21:31:37,347 WARN L232 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 97 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:31:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:46,653 INFO L93 Difference]: Finished difference Result 379 states and 508 transitions. [2022-03-17 21:31:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-17 21:31:46,653 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 77 [2022-03-17 21:31:46,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:46,655 INFO L225 Difference]: With dead ends: 379 [2022-03-17 21:31:46,655 INFO L226 Difference]: Without dead ends: 377 [2022-03-17 21:31:46,656 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=840, Invalid=3715, Unknown=1, NotChecked=0, Total=4556 [2022-03-17 21:31:46,657 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 271 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:46,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 634 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1219 Invalid, 0 Unknown, 164 Unchecked, 4.0s Time] [2022-03-17 21:31:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-17 21:31:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2022-03-17 21:31:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 222 states have (on average 1.1711711711711712) internal successors, (260), 226 states have internal predecessors, (260), 113 states have call successors, (113), 24 states have call predecessors, (113), 23 states have return successors, (111), 108 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-17 21:31:46,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 484 transitions. [2022-03-17 21:31:46,767 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 484 transitions. Word has length 77 [2022-03-17 21:31:46,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:31:46,767 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 484 transitions. [2022-03-17 21:31:46,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-17 21:31:46,767 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 484 transitions. [2022-03-17 21:31:46,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 21:31:46,768 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:31:46,768 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:31:46,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 21:31:46,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:46,983 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:31:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:31:46,984 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-03-17 21:31:46,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:31:46,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132929613] [2022-03-17 21:31:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:46,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:31:46,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:31:46,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081881943] [2022-03-17 21:31:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:31:46,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:31:46,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:31:46,996 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:31:46,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 21:31:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:31:47,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-17 21:31:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:31:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-17 21:31:47,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:31:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-17 21:31:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:31:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132929613] [2022-03-17 21:31:49,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:31:49,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081881943] [2022-03-17 21:31:49,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081881943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:31:49,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:31:49,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-17 21:31:49,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293587750] [2022-03-17 21:31:49,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:31:49,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 21:31:49,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:31:49,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 21:31:49,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-17 21:31:49,130 INFO L87 Difference]: Start difference. First operand 359 states and 484 transitions. Second operand has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-17 21:31:53,897 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:56,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:00,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:03,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:06,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:09,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:11,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:16,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:18,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:20,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:22,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:27,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:30,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:32,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:34,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:34,719 INFO L93 Difference]: Finished difference Result 590 states and 839 transitions. [2022-03-17 21:32:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-17 21:32:34,719 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-03-17 21:32:34,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:34,722 INFO L225 Difference]: With dead ends: 590 [2022-03-17 21:32:34,722 INFO L226 Difference]: Without dead ends: 586 [2022-03-17 21:32:34,724 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=755, Invalid=3405, Unknown=0, NotChecked=0, Total=4160 [2022-03-17 21:32:34,724 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 165 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 397 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.3s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:34,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 787 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1530 Invalid, 8 Unknown, 0 Unchecked, 39.3s Time] [2022-03-17 21:32:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-03-17 21:32:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 553. [2022-03-17 21:32:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 318 states have (on average 1.2075471698113207) internal successors, (384), 322 states have internal predecessors, (384), 205 states have call successors, (205), 30 states have call predecessors, (205), 29 states have return successors, (203), 200 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-17 21:32:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 792 transitions. [2022-03-17 21:32:34,936 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 792 transitions. Word has length 91 [2022-03-17 21:32:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:34,936 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 792 transitions. [2022-03-17 21:32:34,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-17 21:32:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 792 transitions. [2022-03-17 21:32:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 21:32:34,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:34,938 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:34,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:35,159 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 21:32:35,159 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-03-17 21:32:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262709719] [2022-03-17 21:32:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:35,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:35,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322057266] [2022-03-17 21:32:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:35,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:35,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:35,170 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:35,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 21:32:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:32:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 21:32:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-17 21:32:35,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-17 21:32:36,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262709719] [2022-03-17 21:32:36,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:36,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322057266] [2022-03-17 21:32:36,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322057266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:32:36,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:32:36,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-17 21:32:36,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330324908] [2022-03-17 21:32:36,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:36,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:32:36,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:36,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:32:36,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:32:36,388 INFO L87 Difference]: Start difference. First operand 553 states and 792 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 21:32:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:38,311 INFO L93 Difference]: Finished difference Result 1263 states and 1956 transitions. [2022-03-17 21:32:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 21:32:38,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-03-17 21:32:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:38,318 INFO L225 Difference]: With dead ends: 1263 [2022-03-17 21:32:38,318 INFO L226 Difference]: Without dead ends: 1261 [2022-03-17 21:32:38,319 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-03-17 21:32:38,319 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 97 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:38,320 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 479 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-17 21:32:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-03-17 21:32:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1153. [2022-03-17 21:32:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 564 states have (on average 1.303191489361702) internal successors, (735), 568 states have internal predecessors, (735), 553 states have call successors, (553), 36 states have call predecessors, (553), 35 states have return successors, (551), 548 states have call predecessors, (551), 551 states have call successors, (551) [2022-03-17 21:32:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1839 transitions. [2022-03-17 21:32:38,909 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1839 transitions. Word has length 94 [2022-03-17 21:32:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:38,909 INFO L478 AbstractCegarLoop]: Abstraction has 1153 states and 1839 transitions. [2022-03-17 21:32:38,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 21:32:38,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1839 transitions. [2022-03-17 21:32:38,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-17 21:32:38,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:38,911 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:38,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:39,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 21:32:39,122 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash -464781530, now seen corresponding path program 2 times [2022-03-17 21:32:39,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:39,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10069357] [2022-03-17 21:32:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:39,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:39,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:39,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409314420] [2022-03-17 21:32:39,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:32:39,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:39,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:39,134 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:39,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 21:32:39,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:32:39,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:32:39,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 21:32:39,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-17 21:32:39,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-17 21:32:39,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10069357] [2022-03-17 21:32:39,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409314420] [2022-03-17 21:32:39,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409314420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:32:39,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:32:39,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-03-17 21:32:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348753347] [2022-03-17 21:32:39,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:39,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 21:32:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 21:32:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:32:39,532 INFO L87 Difference]: Start difference. First operand 1153 states and 1839 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:32:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:40,574 INFO L93 Difference]: Finished difference Result 1367 states and 2176 transitions. [2022-03-17 21:32:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 21:32:40,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-03-17 21:32:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:40,582 INFO L225 Difference]: With dead ends: 1367 [2022-03-17 21:32:40,582 INFO L226 Difference]: Without dead ends: 1360 [2022-03-17 21:32:40,583 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-03-17 21:32:40,583 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:40,584 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 495 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:32:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2022-03-17 21:32:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1125. [2022-03-17 21:32:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 542 states have (on average 1.311808118081181) internal successors, (711), 545 states have internal predecessors, (711), 547 states have call successors, (547), 36 states have call predecessors, (547), 35 states have return successors, (545), 543 states have call predecessors, (545), 545 states have call successors, (545) [2022-03-17 21:32:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1803 transitions. [2022-03-17 21:32:41,182 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1803 transitions. Word has length 99 [2022-03-17 21:32:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:41,182 INFO L478 AbstractCegarLoop]: Abstraction has 1125 states and 1803 transitions. [2022-03-17 21:32:41,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 21:32:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1803 transitions. [2022-03-17 21:32:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-17 21:32:41,184 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:41,184 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:41,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:41,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 21:32:41,399 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash -650677581, now seen corresponding path program 1 times [2022-03-17 21:32:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:41,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620906207] [2022-03-17 21:32:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:41,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:41,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:41,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143483836] [2022-03-17 21:32:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:41,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:41,409 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:41,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 21:32:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:32:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-17 21:32:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 71 proven. 87 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-17 21:32:42,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:43,260 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:32:47,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:47,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620906207] [2022-03-17 21:32:47,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:47,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143483836] [2022-03-17 21:32:47,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143483836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:32:47,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:32:47,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-17 21:32:47,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993600206] [2022-03-17 21:32:47,448 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:47,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:32:47,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:32:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=492, Unknown=2, NotChecked=0, Total=600 [2022-03-17 21:32:47,449 INFO L87 Difference]: Start difference. First operand 1125 states and 1803 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-17 21:32:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:48,930 INFO L93 Difference]: Finished difference Result 1319 states and 2112 transitions. [2022-03-17 21:32:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 21:32:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 119 [2022-03-17 21:32:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:48,937 INFO L225 Difference]: With dead ends: 1319 [2022-03-17 21:32:48,937 INFO L226 Difference]: Without dead ends: 1317 [2022-03-17 21:32:48,938 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=204, Invalid=916, Unknown=2, NotChecked=0, Total=1122 [2022-03-17 21:32:48,939 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 59 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:48,940 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 523 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 21:32:48,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-03-17 21:32:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1306. [2022-03-17 21:32:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 626 states have (on average 1.3146964856230032) internal successors, (823), 629 states have internal predecessors, (823), 639 states have call successors, (639), 41 states have call predecessors, (639), 40 states have return successors, (637), 635 states have call predecessors, (637), 637 states have call successors, (637) [2022-03-17 21:32:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2099 transitions. [2022-03-17 21:32:49,529 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2099 transitions. Word has length 119 [2022-03-17 21:32:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:49,529 INFO L478 AbstractCegarLoop]: Abstraction has 1306 states and 2099 transitions. [2022-03-17 21:32:49,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-17 21:32:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2099 transitions. [2022-03-17 21:32:49,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-17 21:32:49,531 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:49,532 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:49,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:49,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:49,747 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1360080806, now seen corresponding path program 2 times [2022-03-17 21:32:49,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:49,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120627225] [2022-03-17 21:32:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:49,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:49,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:49,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195155260] [2022-03-17 21:32:49,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:32:49,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:49,757 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:49,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 21:32:49,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:32:49,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:32:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-17 21:32:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 111 proven. 90 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-03-17 21:32:51,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 146 proven. 19 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-17 21:32:55,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120627225] [2022-03-17 21:32:55,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195155260] [2022-03-17 21:32:55,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195155260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:32:55,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:32:55,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-17 21:32:55,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328023850] [2022-03-17 21:32:55,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:55,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-17 21:32:55,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:55,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-17 21:32:55,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-03-17 21:32:55,564 INFO L87 Difference]: Start difference. First operand 1306 states and 2099 transitions. Second operand has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-17 21:32:59,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:01,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:03,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:06,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:10,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:33:13,567 INFO L93 Difference]: Finished difference Result 1514 states and 2421 transitions. [2022-03-17 21:33:13,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-17 21:33:13,568 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) Word has length 124 [2022-03-17 21:33:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:33:13,576 INFO L225 Difference]: With dead ends: 1514 [2022-03-17 21:33:13,576 INFO L226 Difference]: Without dead ends: 1512 [2022-03-17 21:33:13,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 226 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=378, Invalid=1692, Unknown=0, NotChecked=0, Total=2070 [2022-03-17 21:33:13,578 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 96 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 231 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2022-03-17 21:33:13,578 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 809 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1222 Invalid, 5 Unknown, 0 Unchecked, 16.5s Time] [2022-03-17 21:33:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2022-03-17 21:33:14,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1488. [2022-03-17 21:33:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 710 states have (on average 1.3169014084507042) internal successors, (935), 713 states have internal predecessors, (935), 731 states have call successors, (731), 47 states have call predecessors, (731), 46 states have return successors, (729), 727 states have call predecessors, (729), 729 states have call successors, (729) [2022-03-17 21:33:14,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2395 transitions. [2022-03-17 21:33:14,320 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2395 transitions. Word has length 124 [2022-03-17 21:33:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:33:14,320 INFO L478 AbstractCegarLoop]: Abstraction has 1488 states and 2395 transitions. [2022-03-17 21:33:14,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 13 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-17 21:33:14,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2395 transitions. [2022-03-17 21:33:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-17 21:33:14,322 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:33:14,322 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:33:14,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 21:33:14,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:33:14,523 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:33:14,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:33:14,523 INFO L85 PathProgramCache]: Analyzing trace with hash -439137229, now seen corresponding path program 2 times [2022-03-17 21:33:14,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:33:14,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401056448] [2022-03-17 21:33:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:33:14,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:33:14,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:33:14,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294520782] [2022-03-17 21:33:14,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:33:14,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:33:14,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:33:14,539 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:33:14,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 21:33:14,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:33:14,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:33:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-17 21:33:14,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:33:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-03-17 21:33:16,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:33:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-03-17 21:33:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:33:20,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401056448] [2022-03-17 21:33:20,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:33:20,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294520782] [2022-03-17 21:33:20,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294520782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:33:20,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:33:20,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-17 21:33:20,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799432371] [2022-03-17 21:33:20,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:33:20,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-17 21:33:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:33:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-17 21:33:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-03-17 21:33:20,443 INFO L87 Difference]: Start difference. First operand 1488 states and 2395 transitions. Second operand has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2022-03-17 21:33:27,892 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:31,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:35,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:38,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:40,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:43,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:49,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:51,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:55,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:58,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:00,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:03,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:30,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:32,865 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:35,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:38,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:42,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.94s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:47,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:57,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:02,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:05,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:07,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:10,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:12,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:18,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:20,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:26,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:34,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:44,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:47,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:49,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:52,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:54,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:58,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:01,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:03,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:05,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:10,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:13,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:16,061 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:23,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:26,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:36:26,903 INFO L93 Difference]: Finished difference Result 2590 states and 4252 transitions. [2022-03-17 21:36:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-17 21:36:26,904 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 138 [2022-03-17 21:36:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:36:26,915 INFO L225 Difference]: With dead ends: 2590 [2022-03-17 21:36:26,916 INFO L226 Difference]: Without dead ends: 2582 [2022-03-17 21:36:26,918 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 255 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 67.2s TimeCoverageRelationStatistics Valid=1463, Invalid=8637, Unknown=0, NotChecked=0, Total=10100 [2022-03-17 21:36:26,919 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 202 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 601 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.9s IncrementalHoareTripleChecker+Time [2022-03-17 21:36:26,919 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 1122 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 2233 Invalid, 34 Unknown, 0 Unchecked, 121.9s Time] [2022-03-17 21:36:26,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2022-03-17 21:36:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2321. [2022-03-17 21:36:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 1062 states have (on average 1.3493408662900188) internal successors, (1433), 1065 states have internal predecessors, (1433), 1203 states have call successors, (1203), 56 states have call predecessors, (1203), 55 states have return successors, (1201), 1199 states have call predecessors, (1201), 1201 states have call successors, (1201) [2022-03-17 21:36:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3837 transitions. [2022-03-17 21:36:28,363 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3837 transitions. Word has length 138 [2022-03-17 21:36:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:36:28,363 INFO L478 AbstractCegarLoop]: Abstraction has 2321 states and 3837 transitions. [2022-03-17 21:36:28,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 15 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2022-03-17 21:36:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3837 transitions. [2022-03-17 21:36:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-17 21:36:28,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:36:28,366 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:36:28,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 21:36:28,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-17 21:36:28,589 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:36:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:36:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash -529470484, now seen corresponding path program 3 times [2022-03-17 21:36:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:36:28,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670196645] [2022-03-17 21:36:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:36:28,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:36:28,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:36:28,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835983913] [2022-03-17 21:36:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:36:28,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:36:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:36:28,601 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:36:28,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 21:36:28,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-17 21:36:28,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:36:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-17 21:36:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:36:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 75 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-03-17 21:36:30,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:36:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-17 21:36:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:36:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670196645] [2022-03-17 21:36:35,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:36:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835983913] [2022-03-17 21:36:35,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835983913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:36:35,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:36:35,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 37 [2022-03-17 21:36:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64875530] [2022-03-17 21:36:35,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:36:35,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-17 21:36:35,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:36:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-17 21:36:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 21:36:35,247 INFO L87 Difference]: Start difference. First operand 2321 states and 3837 transitions. Second operand has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2022-03-17 21:36:45,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:54,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:56,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:21,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:55,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:38:30,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:38:30,632 INFO L93 Difference]: Finished difference Result 3670 states and 6080 transitions. [2022-03-17 21:38:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-17 21:38:30,634 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) Word has length 141 [2022-03-17 21:38:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:38:30,651 INFO L225 Difference]: With dead ends: 3670 [2022-03-17 21:38:30,651 INFO L226 Difference]: Without dead ends: 3662 [2022-03-17 21:38:30,671 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8794 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=4107, Invalid=21333, Unknown=0, NotChecked=0, Total=25440 [2022-03-17 21:38:30,671 INFO L912 BasicCegarLoop]: 146 mSDtfsCounter, 404 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 3563 mSolverCounterSat, 1446 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 5011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1446 IncrementalHoareTripleChecker+Valid, 3563 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:38:30,671 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 1731 Invalid, 5011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1446 Valid, 3563 Invalid, 2 Unknown, 0 Unchecked, 45.2s Time] [2022-03-17 21:38:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2022-03-17 21:38:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 2737. [2022-03-17 21:38:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 1269 states have (on average 1.343577620173365) internal successors, (1705), 1274 states have internal predecessors, (1705), 1407 states have call successors, (1407), 61 states have call predecessors, (1407), 60 states have return successors, (1405), 1401 states have call predecessors, (1405), 1405 states have call successors, (1405) [2022-03-17 21:38:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 4517 transitions. [2022-03-17 21:38:32,621 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 4517 transitions. Word has length 141 [2022-03-17 21:38:32,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:38:32,621 INFO L478 AbstractCegarLoop]: Abstraction has 2737 states and 4517 transitions. [2022-03-17 21:38:32,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.2) internal successors, (77), 36 states have internal predecessors, (77), 12 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 10 states have call predecessors, (41), 10 states have call successors, (41) [2022-03-17 21:38:32,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 4517 transitions. [2022-03-17 21:38:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-17 21:38:32,625 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:38:32,626 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:38:32,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-17 21:38:32,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-17 21:38:32,849 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:38:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:38:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1830452208, now seen corresponding path program 4 times [2022-03-17 21:38:32,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:38:32,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292978575] [2022-03-17 21:38:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:38:32,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:38:32,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:38:32,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360871695] [2022-03-17 21:38:32,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 21:38:32,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:38:32,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:38:32,862 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:38:32,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-17 21:38:32,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 21:38:32,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:38:32,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-17 21:38:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:38:37,278 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:38:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 180 proven. 160 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2022-03-17 21:38:37,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:38:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 225 proven. 12 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2022-03-17 21:38:40,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:38:40,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292978575] [2022-03-17 21:38:40,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:38:40,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360871695] [2022-03-17 21:38:40,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360871695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:38:40,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:38:40,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 32 [2022-03-17 21:38:40,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425355579] [2022-03-17 21:38:40,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:38:40,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-17 21:38:40,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:38:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-17 21:38:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-03-17 21:38:40,169 INFO L87 Difference]: Start difference. First operand 2737 states and 4517 transitions. Second operand has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-03-17 21:38:45,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:38:50,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:38:59,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:39:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:39:02,786 INFO L93 Difference]: Finished difference Result 3161 states and 5193 transitions. [2022-03-17 21:39:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-17 21:39:02,788 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) Word has length 168 [2022-03-17 21:39:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:39:02,800 INFO L225 Difference]: With dead ends: 3161 [2022-03-17 21:39:02,800 INFO L226 Difference]: Without dead ends: 3153 [2022-03-17 21:39:02,801 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 301 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=647, Invalid=4323, Unknown=0, NotChecked=0, Total=4970 [2022-03-17 21:39:02,802 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 225 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 2547 mSolverCounterSat, 578 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 2547 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:39:02,802 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 978 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 2547 Invalid, 2 Unknown, 0 Unchecked, 14.0s Time] [2022-03-17 21:39:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2022-03-17 21:39:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 2923. [2022-03-17 21:39:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 1326 states have (on average 1.356711915535445) internal successors, (1799), 1329 states have internal predecessors, (1799), 1531 states have call successors, (1531), 66 states have call predecessors, (1531), 65 states have return successors, (1529), 1527 states have call predecessors, (1529), 1529 states have call successors, (1529) [2022-03-17 21:39:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 4859 transitions. [2022-03-17 21:39:05,103 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 4859 transitions. Word has length 168 [2022-03-17 21:39:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:39:05,104 INFO L478 AbstractCegarLoop]: Abstraction has 2923 states and 4859 transitions. [2022-03-17 21:39:05,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 29 states have internal predecessors, (75), 13 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-03-17 21:39:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 4859 transitions. [2022-03-17 21:39:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-17 21:39:05,108 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:39:05,108 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:39:05,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-17 21:39:05,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:39:05,331 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:39:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:39:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1169142410, now seen corresponding path program 5 times [2022-03-17 21:39:05,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:39:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195518829] [2022-03-17 21:39:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:39:05,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:39:05,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:39:05,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941827954] [2022-03-17 21:39:05,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 21:39:05,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:39:05,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:39:05,347 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:39:05,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-17 21:39:05,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-17 21:39:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:39:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 21:39:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:39:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 359 proven. 18 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-17 21:39:05,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:39:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 111 proven. 18 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2022-03-17 21:39:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:39:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195518829] [2022-03-17 21:39:05,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:39:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941827954] [2022-03-17 21:39:05,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941827954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:39:05,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:39:05,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-17 21:39:05,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467857467] [2022-03-17 21:39:05,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:39:05,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 21:39:05,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:39:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 21:39:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:39:05,990 INFO L87 Difference]: Start difference. First operand 2923 states and 4859 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-03-17 21:39:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:39:08,328 INFO L93 Difference]: Finished difference Result 5322 states and 8915 transitions. [2022-03-17 21:39:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 21:39:08,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) Word has length 168 [2022-03-17 21:39:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:39:08,340 INFO L225 Difference]: With dead ends: 5322 [2022-03-17 21:39:08,341 INFO L226 Difference]: Without dead ends: 3128 [2022-03-17 21:39:08,349 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:39:08,350 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:39:08,350 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 337 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:39:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2022-03-17 21:39:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 2970. [2022-03-17 21:39:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 1379 states have (on average 1.3451776649746192) internal successors, (1855), 1404 states have internal predecessors, (1855), 1527 states have call successors, (1527), 64 states have call predecessors, (1527), 63 states have return successors, (1525), 1501 states have call predecessors, (1525), 1525 states have call successors, (1525) [2022-03-17 21:39:10,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 4907 transitions. [2022-03-17 21:39:10,451 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 4907 transitions. Word has length 168 [2022-03-17 21:39:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:39:10,451 INFO L478 AbstractCegarLoop]: Abstraction has 2970 states and 4907 transitions. [2022-03-17 21:39:10,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2022-03-17 21:39:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 4907 transitions. [2022-03-17 21:39:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-17 21:39:10,456 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:39:10,456 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:39:10,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-17 21:39:10,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:39:10,671 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:39:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:39:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash 540961160, now seen corresponding path program 3 times [2022-03-17 21:39:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:39:10,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240635308] [2022-03-17 21:39:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:39:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:39:10,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:39:10,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585158359] [2022-03-17 21:39:10,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:39:10,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:39:10,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:39:10,685 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:39:10,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-17 21:39:10,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 21:39:10,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:39:10,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 21:39:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:39:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 154 proven. 33 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-03-17 21:39:11,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:39:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 124 proven. 12 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2022-03-17 21:39:11,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:39:11,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240635308] [2022-03-17 21:39:11,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:39:11,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585158359] [2022-03-17 21:39:11,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585158359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:39:11,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:39:11,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-17 21:39:11,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308854953] [2022-03-17 21:39:11,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:39:11,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 21:39:11,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:39:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 21:39:11,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-17 21:39:11,495 INFO L87 Difference]: Start difference. First operand 2970 states and 4907 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-17 21:39:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:39:14,697 INFO L93 Difference]: Finished difference Result 4157 states and 6945 transitions. [2022-03-17 21:39:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 21:39:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 187 [2022-03-17 21:39:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:39:14,714 INFO L225 Difference]: With dead ends: 4157 [2022-03-17 21:39:14,714 INFO L226 Difference]: Without dead ends: 4153 [2022-03-17 21:39:14,715 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-17 21:39:14,716 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:39:14,716 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 238 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 21:39:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2022-03-17 21:39:16,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2717. [2022-03-17 21:39:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 1275 states have (on average 1.3372549019607842) internal successors, (1705), 1296 states have internal predecessors, (1705), 1379 states have call successors, (1379), 64 states have call predecessors, (1379), 62 states have return successors, (1377), 1356 states have call predecessors, (1377), 1377 states have call successors, (1377) [2022-03-17 21:39:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 4461 transitions. [2022-03-17 21:39:16,732 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 4461 transitions. Word has length 187 [2022-03-17 21:39:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:39:16,732 INFO L478 AbstractCegarLoop]: Abstraction has 2717 states and 4461 transitions. [2022-03-17 21:39:16,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-17 21:39:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 4461 transitions. [2022-03-17 21:39:16,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-17 21:39:16,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:39:16,739 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:39:16,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-17 21:39:16,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-17 21:39:16,955 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:39:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:39:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash 995345417, now seen corresponding path program 6 times [2022-03-17 21:39:16,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:39:16,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732165653] [2022-03-17 21:39:16,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:39:16,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:39:16,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:39:16,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284696517] [2022-03-17 21:39:16,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 21:39:16,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:39:16,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:39:16,968 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:39:16,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-17 21:39:17,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-17 21:39:17,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:39:17,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 21:39:17,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:39:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 56 proven. 147 refuted. 0 times theorem prover too weak. 1545 trivial. 0 not checked. [2022-03-17 21:39:17,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:39:18,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:39:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732165653] [2022-03-17 21:39:18,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:39:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284696517] [2022-03-17 21:39:18,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284696517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:39:18,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:39:18,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-17 21:39:18,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716483638] [2022-03-17 21:39:18,856 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:39:18,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 21:39:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:39:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 21:39:18,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-17 21:39:18,857 INFO L87 Difference]: Start difference. First operand 2717 states and 4461 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 21:39:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:39:22,611 INFO L93 Difference]: Finished difference Result 3382 states and 5600 transitions. [2022-03-17 21:39:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 21:39:22,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 207 [2022-03-17 21:39:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:39:22,621 INFO L225 Difference]: With dead ends: 3382 [2022-03-17 21:39:22,621 INFO L226 Difference]: Without dead ends: 3377 [2022-03-17 21:39:22,622 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 313 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=473, Invalid=2179, Unknown=0, NotChecked=0, Total=2652 [2022-03-17 21:39:22,623 INFO L912 BasicCegarLoop]: 107 mSDtfsCounter, 85 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 21:39:22,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1041 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 696 Invalid, 0 Unknown, 49 Unchecked, 0.7s Time] [2022-03-17 21:39:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2022-03-17 21:39:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2942. [2022-03-17 21:39:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 1387 states have (on average 1.3388608507570297) internal successors, (1857), 1411 states have internal predecessors, (1857), 1492 states have call successors, (1492), 64 states have call predecessors, (1492), 62 states have return successors, (1490), 1466 states have call predecessors, (1490), 1490 states have call successors, (1490) [2022-03-17 21:39:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4839 transitions. [2022-03-17 21:39:24,974 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4839 transitions. Word has length 207 [2022-03-17 21:39:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:39:24,975 INFO L478 AbstractCegarLoop]: Abstraction has 2942 states and 4839 transitions. [2022-03-17 21:39:24,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 21:39:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4839 transitions. [2022-03-17 21:39:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-17 21:39:24,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:39:24,980 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:39:25,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-17 21:39:25,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-17 21:39:25,195 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:39:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:39:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1467848016, now seen corresponding path program 7 times [2022-03-17 21:39:25,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:39:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545218784] [2022-03-17 21:39:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:39:25,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:39:25,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:39:25,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083924433] [2022-03-17 21:39:25,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 21:39:25,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:39:25,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:39:25,208 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:39:25,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-17 21:39:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:39:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-17 21:39:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:39:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 535 proven. 80 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2022-03-17 21:39:26,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:39:26,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:39:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545218784] [2022-03-17 21:39:26,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:39:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083924433] [2022-03-17 21:39:26,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083924433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:39:26,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:39:26,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-17 21:39:26,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929461944] [2022-03-17 21:39:26,605 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:39:26,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-17 21:39:26,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:39:26,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-17 21:39:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-03-17 21:39:26,606 INFO L87 Difference]: Start difference. First operand 2942 states and 4839 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-17 21:39:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:39:30,299 INFO L93 Difference]: Finished difference Result 3607 states and 5860 transitions. [2022-03-17 21:39:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-17 21:39:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 212 [2022-03-17 21:39:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:39:30,307 INFO L225 Difference]: With dead ends: 3607 [2022-03-17 21:39:30,307 INFO L226 Difference]: Without dead ends: 2986 [2022-03-17 21:39:30,310 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=646, Invalid=2776, Unknown=0, NotChecked=0, Total=3422 [2022-03-17 21:39:30,311 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 103 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 21:39:30,311 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 873 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 21:39:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2022-03-17 21:39:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2854. [2022-03-17 21:39:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 1359 states have (on average 1.3289183222958056) internal successors, (1806), 1383 states have internal predecessors, (1806), 1432 states have call successors, (1432), 64 states have call predecessors, (1432), 62 states have return successors, (1430), 1406 states have call predecessors, (1430), 1430 states have call successors, (1430) [2022-03-17 21:39:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 4668 transitions. [2022-03-17 21:39:32,409 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 4668 transitions. Word has length 212 [2022-03-17 21:39:32,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:39:32,410 INFO L478 AbstractCegarLoop]: Abstraction has 2854 states and 4668 transitions. [2022-03-17 21:39:32,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-17 21:39:32,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 4668 transitions. [2022-03-17 21:39:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-17 21:39:32,415 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:39:32,415 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:39:32,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-17 21:39:32,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-17 21:39:32,631 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:39:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:39:32,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1683356431, now seen corresponding path program 8 times [2022-03-17 21:39:32,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:39:32,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936281512] [2022-03-17 21:39:32,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:39:32,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:39:32,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:39:32,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391345052] [2022-03-17 21:39:32,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:39:32,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:39:32,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:39:32,645 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:39:32,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-17 21:39:32,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:39:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:39:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 21:39:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:39:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1781 backedges. 521 proven. 109 refuted. 0 times theorem prover too weak. 1151 trivial. 0 not checked. [2022-03-17 21:39:33,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:39:35,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:39:35,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936281512] [2022-03-17 21:39:35,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:39:35,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391345052] [2022-03-17 21:39:35,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391345052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:39:35,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:39:35,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-17 21:39:35,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664213042] [2022-03-17 21:39:35,086 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:39:35,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 21:39:35,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:39:35,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 21:39:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1070, Unknown=1, NotChecked=0, Total=1190 [2022-03-17 21:39:35,088 INFO L87 Difference]: Start difference. First operand 2854 states and 4668 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-17 21:39:39,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:39:39,453 INFO L93 Difference]: Finished difference Result 3650 states and 5963 transitions. [2022-03-17 21:39:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-17 21:39:39,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 215 [2022-03-17 21:39:39,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:39:39,463 INFO L225 Difference]: With dead ends: 3650 [2022-03-17 21:39:39,463 INFO L226 Difference]: Without dead ends: 3224 [2022-03-17 21:39:39,465 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=929, Invalid=4182, Unknown=1, NotChecked=0, Total=5112 [2022-03-17 21:39:39,466 INFO L912 BasicCegarLoop]: 116 mSDtfsCounter, 128 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 21:39:39,466 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 848 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 21:39:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2022-03-17 21:39:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 3167. [2022-03-17 21:39:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 1497 states have (on average 1.334001336005344) internal successors, (1997), 1523 states have internal predecessors, (1997), 1607 states have call successors, (1607), 64 states have call predecessors, (1607), 62 states have return successors, (1605), 1579 states have call predecessors, (1605), 1605 states have call successors, (1605) [2022-03-17 21:39:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 5209 transitions. [2022-03-17 21:39:41,946 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 5209 transitions. Word has length 215 [2022-03-17 21:39:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:39:41,947 INFO L478 AbstractCegarLoop]: Abstraction has 3167 states and 5209 transitions. [2022-03-17 21:39:41,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 9 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2022-03-17 21:39:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 5209 transitions. [2022-03-17 21:39:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-03-17 21:39:41,952 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:39:41,952 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:39:41,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-17 21:39:42,175 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-17 21:39:42,176 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:39:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:39:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash 69551670, now seen corresponding path program 9 times [2022-03-17 21:39:42,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:39:42,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419047351] [2022-03-17 21:39:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:39:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:39:42,184 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:39:42,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934673254] [2022-03-17 21:39:42,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:39:42,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:39:42,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:39:42,192 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:39:42,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-17 21:39:43,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-17 21:39:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:39:43,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-17 21:39:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:39:56,609 WARN L855 $PredicateComparison]: unable to prove that (exists ((main_~x~0 Int) (aux_div_main_~y~0_71 Int) (aux_div_main_~v~0_17 Int) (aux_div_v_main_~c~0_97_22 Int) (aux_mod_v_main_~c~0_97_22 Int) (main_~s~0 Int)) (let ((.cse3 (* 2 aux_div_v_main_~c~0_97_22)) (.cse1 (* c_main_~q~0 main_~x~0)) (.cse4 (* 2 aux_div_main_~y~0_71))) (let ((.cse2 (+ .cse1 .cse4)) (.cse0 (+ .cse3 aux_mod_v_main_~c~0_97_22))) (and (= (+ (* main_~x~0 main_~s~0) c_main_~b~0 (* main_~s~0 .cse0)) (+ (* 2 (* main_~s~0 aux_div_main_~y~0_71)) (* c_main_~q~0 main_~x~0 main_~s~0) .cse1)) (<= c_main_~b~0 aux_div_v_main_~c~0_97_22) (<= (+ main_~s~0 1) 0) (<= c_main_~b~0 aux_div_main_~v~0_17) (<= .cse2 (+ .cse3 main_~x~0 10 aux_mod_v_main_~c~0_97_22)) (< aux_mod_v_main_~c~0_97_22 2) (<= 0 aux_mod_v_main_~c~0_97_22) (<= (+ .cse3 main_~x~0 aux_mod_v_main_~c~0_97_22) .cse2) (< (+ (* main_~x~0 2) .cse3 aux_mod_v_main_~c~0_97_22) .cse2) (< (+ (* 6 aux_div_v_main_~c~0_97_22) (* 3 aux_mod_v_main_~c~0_97_22)) .cse4) (<= (+ c_main_~c~0 (* 2 aux_div_main_~v~0_17)) .cse0))))) is different from true [2022-03-17 21:40:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 203 proven. 216 refuted. 0 times theorem prover too weak. 1373 trivial. 14 not checked. [2022-03-17 21:40:26,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:40:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:40:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419047351] [2022-03-17 21:40:33,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:40:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934673254] [2022-03-17 21:40:33,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934673254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:40:33,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:40:33,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-17 21:40:33,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720369522] [2022-03-17 21:40:33,113 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:40:33,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-17 21:40:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:40:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-17 21:40:33,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1393, Unknown=15, NotChecked=78, Total=1722 [2022-03-17 21:40:33,114 INFO L87 Difference]: Start difference. First operand 3167 states and 5209 transitions. Second operand has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-03-17 21:40:43,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:40:45,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:41:07,278 WARN L232 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 72 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:41:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:41:09,397 INFO L93 Difference]: Finished difference Result 3925 states and 6493 transitions. [2022-03-17 21:41:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-17 21:41:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) Word has length 220 [2022-03-17 21:41:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:41:09,411 INFO L225 Difference]: With dead ends: 3925 [2022-03-17 21:41:09,411 INFO L226 Difference]: Without dead ends: 3920 [2022-03-17 21:41:09,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 67.9s TimeCoverageRelationStatistics Valid=317, Invalid=2120, Unknown=17, NotChecked=96, Total=2550 [2022-03-17 21:41:09,413 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 97 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 80 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-03-17 21:41:09,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 1201 Invalid, 2642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1956 Invalid, 2 Unknown, 604 Unchecked, 7.6s Time] [2022-03-17 21:41:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2022-03-17 21:41:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3226. [2022-03-17 21:41:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 1529 states have (on average 1.3315892740353172) internal successors, (2036), 1554 states have internal predecessors, (2036), 1634 states have call successors, (1634), 64 states have call predecessors, (1634), 62 states have return successors, (1632), 1607 states have call predecessors, (1632), 1632 states have call successors, (1632) [2022-03-17 21:41:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 5302 transitions. [2022-03-17 21:41:11,951 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 5302 transitions. Word has length 220 [2022-03-17 21:41:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:41:11,951 INFO L478 AbstractCegarLoop]: Abstraction has 3226 states and 5302 transitions. [2022-03-17 21:41:11,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (33), 10 states have call predecessors, (33), 11 states have call successors, (33) [2022-03-17 21:41:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 5302 transitions. [2022-03-17 21:41:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-17 21:41:11,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:41:11,957 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:41:11,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-17 21:41:12,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-17 21:41:12,164 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:41:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:41:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2096192570, now seen corresponding path program 10 times [2022-03-17 21:41:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:41:12,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547681291] [2022-03-17 21:41:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:41:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:41:12,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:41:12,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840730408] [2022-03-17 21:41:12,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 21:41:12,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:41:12,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:41:12,177 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:41:12,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-17 21:41:12,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 21:41:12,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:41:12,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 21:41:12,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:41:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 69 proven. 202 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2022-03-17 21:41:14,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:41:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 69 proven. 202 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2022-03-17 21:41:17,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:41:17,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547681291] [2022-03-17 21:41:17,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:41:17,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840730408] [2022-03-17 21:41:17,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840730408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:41:17,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:41:17,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2022-03-17 21:41:17,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522038231] [2022-03-17 21:41:17,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:41:17,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-17 21:41:17,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:41:17,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-17 21:41:17,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 21:41:17,196 INFO L87 Difference]: Start difference. First operand 3226 states and 5302 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 20 states have call successors, (74), 2 states have call predecessors, (74), 2 states have return successors, (73), 19 states have call predecessors, (73), 19 states have call successors, (73) [2022-03-17 21:42:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:42:24,160 INFO L93 Difference]: Finished difference Result 7628 states and 12841 transitions. [2022-03-17 21:42:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-17 21:42:24,162 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 20 states have call successors, (74), 2 states have call predecessors, (74), 2 states have return successors, (73), 19 states have call predecessors, (73), 19 states have call successors, (73) Word has length 229 [2022-03-17 21:42:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:42:24,179 INFO L225 Difference]: With dead ends: 7628 [2022-03-17 21:42:24,180 INFO L226 Difference]: Without dead ends: 6744 [2022-03-17 21:42:24,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8013 ImplicationChecksByTransitivity, 44.5s TimeCoverageRelationStatistics Valid=3431, Invalid=21691, Unknown=0, NotChecked=0, Total=25122 [2022-03-17 21:42:24,187 INFO L912 BasicCegarLoop]: 326 mSDtfsCounter, 300 mSDsluCounter, 3421 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 1539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 3747 SdHoareTripleChecker+Invalid, 5930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1539 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:42:24,187 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 3747 Invalid, 5930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1539 Valid, 4391 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2022-03-17 21:42:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6744 states. [2022-03-17 21:42:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6744 to 5610. [2022-03-17 21:42:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5610 states, 2599 states have (on average 1.3405155829165063) internal successors, (3484), 2632 states have internal predecessors, (3484), 2948 states have call successors, (2948), 64 states have call predecessors, (2948), 62 states have return successors, (2946), 2913 states have call predecessors, (2946), 2946 states have call successors, (2946) [2022-03-17 21:42:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 9378 transitions. [2022-03-17 21:42:29,055 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 9378 transitions. Word has length 229 [2022-03-17 21:42:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:42:29,055 INFO L478 AbstractCegarLoop]: Abstraction has 5610 states and 9378 transitions. [2022-03-17 21:42:29,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 20 states have call successors, (74), 2 states have call predecessors, (74), 2 states have return successors, (73), 19 states have call predecessors, (73), 19 states have call successors, (73) [2022-03-17 21:42:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 9378 transitions. [2022-03-17 21:42:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-03-17 21:42:29,063 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:42:29,063 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:42:29,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-17 21:42:29,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:42:29,268 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:42:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:42:29,268 INFO L85 PathProgramCache]: Analyzing trace with hash -986980691, now seen corresponding path program 11 times [2022-03-17 21:42:29,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:42:29,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579232744] [2022-03-17 21:42:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:42:29,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:42:29,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:42:29,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439674342] [2022-03-17 21:42:29,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 21:42:29,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:42:29,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:42:29,281 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:42:29,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-17 21:42:29,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-17 21:42:29,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:42:29,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-17 21:42:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:42:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2288 backedges. 578 proven. 151 refuted. 0 times theorem prover too weak. 1559 trivial. 0 not checked. [2022-03-17 21:42:38,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:42:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2288 backedges. 143 proven. 146 refuted. 0 times theorem prover too weak. 1999 trivial. 0 not checked. [2022-03-17 21:42:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:42:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579232744] [2022-03-17 21:42:41,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:42:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439674342] [2022-03-17 21:42:41,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439674342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:42:41,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:42:41,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2022-03-17 21:42:41,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306553171] [2022-03-17 21:42:41,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:42:41,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-17 21:42:41,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:42:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-17 21:42:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1155, Unknown=2, NotChecked=0, Total=1332 [2022-03-17 21:42:41,080 INFO L87 Difference]: Start difference. First operand 5610 states and 9378 transitions. Second operand has 37 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 35 states have internal predecessors, (98), 18 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (72), 18 states have call predecessors, (72), 18 states have call successors, (72) [2022-03-17 21:43:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:43:38,434 INFO L93 Difference]: Finished difference Result 11522 states and 19117 transitions. [2022-03-17 21:43:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-17 21:43:38,436 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 35 states have internal predecessors, (98), 18 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (72), 18 states have call predecessors, (72), 18 states have call successors, (72) Word has length 234 [2022-03-17 21:43:38,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:43:38,456 INFO L225 Difference]: With dead ends: 11522 [2022-03-17 21:43:38,456 INFO L226 Difference]: Without dead ends: 7608 [2022-03-17 21:43:38,470 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5800 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=3995, Invalid=16881, Unknown=4, NotChecked=0, Total=20880 [2022-03-17 21:43:38,471 INFO L912 BasicCegarLoop]: 250 mSDtfsCounter, 275 mSDsluCounter, 2425 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 1323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 3811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1323 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:43:38,471 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 2675 Invalid, 3811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1323 Valid, 2423 Invalid, 0 Unknown, 65 Unchecked, 9.1s Time] [2022-03-17 21:43:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7608 states. [2022-03-17 21:43:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7608 to 4631. [2022-03-17 21:43:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 2181 states have (on average 1.3191196698762035) internal successors, (2877), 2224 states have internal predecessors, (2877), 2387 states have call successors, (2387), 64 states have call predecessors, (2387), 62 states have return successors, (2385), 2342 states have call predecessors, (2385), 2385 states have call successors, (2385) [2022-03-17 21:43:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 7649 transitions. [2022-03-17 21:43:43,156 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 7649 transitions. Word has length 234 [2022-03-17 21:43:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:43:43,156 INFO L478 AbstractCegarLoop]: Abstraction has 4631 states and 7649 transitions. [2022-03-17 21:43:43,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.6486486486486487) internal successors, (98), 35 states have internal predecessors, (98), 18 states have call successors, (73), 2 states have call predecessors, (73), 3 states have return successors, (72), 18 states have call predecessors, (72), 18 states have call successors, (72) [2022-03-17 21:43:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 7649 transitions. [2022-03-17 21:43:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-03-17 21:43:43,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:43:43,163 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:43:43,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-17 21:43:43,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-17 21:43:43,364 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:43:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:43:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1645090567, now seen corresponding path program 12 times [2022-03-17 21:43:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:43:43,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768249756] [2022-03-17 21:43:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:43:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:43:43,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:43:43,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466507500] [2022-03-17 21:43:43,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 21:43:43,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:43:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:43:43,376 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:43:43,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-17 21:43:45,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-17 21:43:45,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:43:45,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-17 21:43:45,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:43:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2288 backedges. 366 proven. 225 refuted. 0 times theorem prover too weak. 1697 trivial. 0 not checked. [2022-03-17 21:43:53,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:43:56,512 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful