/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_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 22:45:49,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 22:45:49,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 22:45:49,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 22:45:49,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 22:45:49,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 22:45:49,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 22:45:49,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 22:45:49,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 22:45:49,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 22:45:49,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 22:45:49,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 22:45:49,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 22:45:49,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 22:45:49,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 22:45:49,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 22:45:49,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 22:45:49,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 22:45:49,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 22:45:49,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 22:45:49,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 22:45:49,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 22:45:49,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 22:45:49,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 22:45:49,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 22:45:49,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 22:45:49,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 22:45:49,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 22:45:49,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 22:45:49,439 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 22:45:49,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 22:45:49,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 22:45:49,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 22:45:49,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 22:45:49,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 22:45:49,441 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 22:45:49,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 22:45:49,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 22:45:49,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 22:45:49,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 22:45:49,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:45:49,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 22:45:49,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 22:45:49,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 22:45:49,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 22:45:49,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 22:45:49,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 22:45:49,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 22:45:49,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 22:45:49,444 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 22:45:49,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 22:45:49,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 22:45:49,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 22:45:49,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 22:45:49,637 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 22:45:49,638 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 22:45:49,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-02-23 22:45:49,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3876493/56d7c6455f2c4dd5a29895a8d69b20c8/FLAG4d9292f2b [2022-02-23 22:45:49,977 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 22:45:49,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-02-23 22:45:49,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3876493/56d7c6455f2c4dd5a29895a8d69b20c8/FLAG4d9292f2b [2022-02-23 22:45:50,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d3876493/56d7c6455f2c4dd5a29895a8d69b20c8 [2022-02-23 22:45:50,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 22:45:50,403 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 22:45:50,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 22:45:50,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 22:45:50,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 22:45:50,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557c374d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50, skipping insertion in model container [2022-02-23 22:45:50,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 22:45:50,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 22:45:50,575 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_unwindbound50.c[490,503] [2022-02-23 22:45:50,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:45:50,593 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 22:45:50,601 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_unwindbound50.c[490,503] [2022-02-23 22:45:50,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 22:45:50,618 INFO L208 MainTranslator]: Completed translation [2022-02-23 22:45:50,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50 WrapperNode [2022-02-23 22:45:50,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 22:45:50,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 22:45:50,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 22:45:50,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 22:45:50,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 22:45:50,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 22:45:50,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 22:45:50,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 22:45:50,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 22:45:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:50,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 22:45:50,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 22:45:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 22:45:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 22:45:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 22:45:50,711 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 22:45:50,711 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 22:45:50,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 22:45:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 22:45:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 22:45:50,712 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 22:45:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 22:45:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 22:45:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 22:45:50,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 22:45:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 22:45:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 22:45:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 22:45:50,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 22:45:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 22:45:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 22:45:50,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 22:45:50,809 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 22:45:50,810 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 22:45:50,966 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 22:45:50,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 22:45:50,970 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 22:45:50,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:45:50 BoogieIcfgContainer [2022-02-23 22:45:50,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 22:45:50,972 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 22:45:50,972 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 22:45:50,973 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 22:45:50,975 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:45:50" (1/1) ... [2022-02-23 22:45:50,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:45:50 BasicIcfg [2022-02-23 22:45:50,996 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 22:45:50,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 22:45:50,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 22:45:50,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 22:45:50,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:45:50" (1/4) ... [2022-02-23 22:45:51,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c732f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:45:50, skipping insertion in model container [2022-02-23 22:45:51,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:45:50" (2/4) ... [2022-02-23 22:45:51,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c732f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:45:51, skipping insertion in model container [2022-02-23 22:45:51,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:45:50" (3/4) ... [2022-02-23 22:45:51,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c732f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:45:51, skipping insertion in model container [2022-02-23 22:45:51,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 10:45:50" (4/4) ... [2022-02-23 22:45:51,003 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.cqvasr [2022-02-23 22:45:51,007 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 22:45:51,007 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 22:45:51,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 22:45:51,053 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 22:45:51,054 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 22:45:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 22:45:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 22:45:51,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:51,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:51,073 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-02-23 22:45:51,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:51,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776679683] [2022-02-23 22:45:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:51,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 22:45:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:51,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 22:45:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:51,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 22:45:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:51,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:51,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776679683] [2022-02-23 22:45:51,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776679683] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:51,258 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:51,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 22:45:51,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579005759] [2022-02-23 22:45:51,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:51,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 22:45:51,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 22:45:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:45:51,286 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:51,370 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-02-23 22:45:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 22:45:51,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-23 22:45:51,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:51,377 INFO L225 Difference]: With dead ends: 74 [2022-02-23 22:45:51,377 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 22:45:51,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 22:45:51,382 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:51,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 22:45:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-02-23 22:45:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 22:45:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-02-23 22:45:51,408 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-02-23 22:45:51,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:51,408 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-02-23 22:45:51,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-02-23 22:45:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 22:45:51,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:51,410 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:51,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 22:45:51,410 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:51,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:51,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-02-23 22:45:51,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:51,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672445513] [2022-02-23 22:45:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:51,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:51,421 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:51,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049151741] [2022-02-23 22:45:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:51,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:51,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:51,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:51,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 22:45:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:51,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 22:45:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:51,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:51,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:51,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672445513] [2022-02-23 22:45:51,541 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:51,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049151741] [2022-02-23 22:45:51,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049151741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:51,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:51,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 22:45:51,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020665191] [2022-02-23 22:45:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:51,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 22:45:51,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 22:45:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 22:45:51,543 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:51,556 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-02-23 22:45:51,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 22:45:51,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-23 22:45:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:51,558 INFO L225 Difference]: With dead ends: 44 [2022-02-23 22:45:51,558 INFO L226 Difference]: Without dead ends: 37 [2022-02-23 22:45:51,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 22:45:51,559 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:51,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:51,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-23 22:45:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-23 22:45:51,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 22:45:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-02-23 22:45:51,568 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-02-23 22:45:51,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:51,569 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-02-23 22:45:51,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:51,569 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-02-23 22:45:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 22:45:51,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:51,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:51,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:51,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:51,788 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-02-23 22:45:51,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:51,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342416853] [2022-02-23 22:45:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:51,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:51,803 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:51,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727512300] [2022-02-23 22:45:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:51,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:51,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 22:45:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:45:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:45:51,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:51,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:51,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342416853] [2022-02-23 22:45:51,901 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:51,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727512300] [2022-02-23 22:45:51,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727512300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:51,902 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:51,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 22:45:51,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079110265] [2022-02-23 22:45:51,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:51,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:45:51,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:45:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:45:51,904 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:45:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:51,987 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-02-23 22:45:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:45:51,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-02-23 22:45:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:51,989 INFO L225 Difference]: With dead ends: 57 [2022-02-23 22:45:51,989 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 22:45:51,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 22:45:51,990 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:51,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:51,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 22:45:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-02-23 22:45:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 22:45:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-02-23 22:45:51,997 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-02-23 22:45:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:51,997 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-02-23 22:45:51,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:45:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-02-23 22:45:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 22:45:51,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:51,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:52,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:52,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 22:45:52,199 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:52,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-02-23 22:45:52,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:52,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415149780] [2022-02-23 22:45:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:52,209 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:52,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471003838] [2022-02-23 22:45:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:52,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:52,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:52,211 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:52,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 22:45:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:52,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:45:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:52,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:52,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:52,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415149780] [2022-02-23 22:45:52,337 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:52,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471003838] [2022-02-23 22:45:52,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471003838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:52,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:52,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:45:52,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169138120] [2022-02-23 22:45:52,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:52,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:45:52,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:45:52,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:45:52,339 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:52,368 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-02-23 22:45:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:45:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-02-23 22:45:52,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:52,371 INFO L225 Difference]: With dead ends: 62 [2022-02-23 22:45:52,371 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 22:45:52,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:45:52,375 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:52,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 22:45:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-23 22:45:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 22:45:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-02-23 22:45:52,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-02-23 22:45:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:52,386 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-02-23 22:45:52,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-02-23 22:45:52,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 22:45:52,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:52,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:52,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:52,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:52,605 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-02-23 22:45:52,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:52,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307245195] [2022-02-23 22:45:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:52,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:52,618 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:52,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889602403] [2022-02-23 22:45:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:52,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:52,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:52,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 22:45:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 22:45:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:45:52,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:52,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:52,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307245195] [2022-02-23 22:45:52,872 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:52,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889602403] [2022-02-23 22:45:52,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889602403] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:52,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:52,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 22:45:52,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362627380] [2022-02-23 22:45:52,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:52,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 22:45:52,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 22:45:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:45:52,874 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:45:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:53,021 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-02-23 22:45:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 22:45:53,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-02-23 22:45:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:53,022 INFO L225 Difference]: With dead ends: 68 [2022-02-23 22:45:53,022 INFO L226 Difference]: Without dead ends: 66 [2022-02-23 22:45:53,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:45:53,023 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:53,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 239 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-23 22:45:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-02-23 22:45:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 22:45:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-02-23 22:45:53,030 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-02-23 22:45:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:53,030 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-02-23 22:45:53,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:45:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-02-23 22:45:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 22:45:53,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:53,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:53,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:53,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:53,243 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-02-23 22:45:53,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:53,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428690701] [2022-02-23 22:45:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:53,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:53,259 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:53,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410584505] [2022-02-23 22:45:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:53,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:53,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:53,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 22:45:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:53,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:45:53,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:53,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:53,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:53,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428690701] [2022-02-23 22:45:53,432 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:53,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410584505] [2022-02-23 22:45:53,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410584505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:53,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:53,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 22:45:53,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560021473] [2022-02-23 22:45:53,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:53,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 22:45:53,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:53,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 22:45:53,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:45:53,433 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 22:45:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:53,532 INFO L93 Difference]: Finished difference Result 151 states and 197 transitions. [2022-02-23 22:45:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 22:45:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-02-23 22:45:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:53,534 INFO L225 Difference]: With dead ends: 151 [2022-02-23 22:45:53,534 INFO L226 Difference]: Without dead ends: 144 [2022-02-23 22:45:53,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-02-23 22:45:53,535 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:53,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 272 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-23 22:45:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-02-23 22:45:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 22:45:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-02-23 22:45:53,547 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-02-23 22:45:53,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:53,547 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-02-23 22:45:53,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 22:45:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-02-23 22:45:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 22:45:53,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:53,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:53,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:53,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:53,763 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-02-23 22:45:53,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:53,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208145794] [2022-02-23 22:45:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:53,771 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:53,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119530295] [2022-02-23 22:45:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:53,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:53,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:53,773 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:53,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 22:45:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:45:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:45:53,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:45:53,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:53,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208145794] [2022-02-23 22:45:53,960 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:53,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119530295] [2022-02-23 22:45:53,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119530295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:53,960 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:53,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 22:45:53,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016559101] [2022-02-23 22:45:53,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:53,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 22:45:53,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:53,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 22:45:53,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 22:45:53,962 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:54,097 INFO L93 Difference]: Finished difference Result 187 states and 265 transitions. [2022-02-23 22:45:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 22:45:54,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-02-23 22:45:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:54,101 INFO L225 Difference]: With dead ends: 187 [2022-02-23 22:45:54,101 INFO L226 Difference]: Without dead ends: 175 [2022-02-23 22:45:54,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-23 22:45:54,102 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 113 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:54,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 362 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-23 22:45:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-02-23 22:45:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 22:45:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-02-23 22:45:54,117 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-02-23 22:45:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:54,117 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-02-23 22:45:54,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-02-23 22:45:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 22:45:54,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:54,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:54,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 22:45:54,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:54,333 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:54,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:54,334 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-02-23 22:45:54,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:54,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587300855] [2022-02-23 22:45:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:54,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:54,351 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:54,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737788197] [2022-02-23 22:45:54,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:54,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:54,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:54,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:54,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 22:45:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:54,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 22:45:54,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:45:54,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:54,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:54,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587300855] [2022-02-23 22:45:54,571 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:54,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737788197] [2022-02-23 22:45:54,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737788197] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:54,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:54,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 22:45:54,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21137583] [2022-02-23 22:45:54,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:54,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 22:45:54,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 22:45:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:45:54,572 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 22:45:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:54,715 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2022-02-23 22:45:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 22:45:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-02-23 22:45:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:54,716 INFO L225 Difference]: With dead ends: 157 [2022-02-23 22:45:54,716 INFO L226 Difference]: Without dead ends: 155 [2022-02-23 22:45:54,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-23 22:45:54,717 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:54,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 269 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-23 22:45:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-02-23 22:45:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 22:45:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-02-23 22:45:54,730 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-02-23 22:45:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:54,730 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-02-23 22:45:54,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-23 22:45:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-02-23 22:45:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 22:45:54,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:54,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:54,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:54,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:54,950 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:54,950 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-02-23 22:45:54,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:54,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984665162] [2022-02-23 22:45:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:54,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:54,958 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:54,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741395418] [2022-02-23 22:45:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:54,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:54,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:54,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:54,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 22:45:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:54,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 22:45:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 22:45:55,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:55,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:55,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984665162] [2022-02-23 22:45:55,240 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:55,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741395418] [2022-02-23 22:45:55,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741395418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:55,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:55,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-02-23 22:45:55,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247512821] [2022-02-23 22:45:55,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:55,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 22:45:55,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 22:45:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:45:55,241 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:45:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:55,371 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2022-02-23 22:45:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 22:45:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-23 22:45:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:55,373 INFO L225 Difference]: With dead ends: 179 [2022-02-23 22:45:55,373 INFO L226 Difference]: Without dead ends: 177 [2022-02-23 22:45:55,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:45:55,373 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 76 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:55,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 409 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:55,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-23 22:45:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-02-23 22:45:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-23 22:45:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-02-23 22:45:55,394 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-02-23 22:45:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:55,394 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-02-23 22:45:55,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:45:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-02-23 22:45:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 22:45:55,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:55,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:55,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:55,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 22:45:55,603 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:55,603 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-02-23 22:45:55,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:55,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893401942] [2022-02-23 22:45:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:55,612 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:55,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905039842] [2022-02-23 22:45:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:55,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:55,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:55,613 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:55,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 22:45:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 22:45:55,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:55,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:55,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:55,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893401942] [2022-02-23 22:45:55,701 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:55,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905039842] [2022-02-23 22:45:55,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905039842] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:55,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:55,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 22:45:55,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869107493] [2022-02-23 22:45:55,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:55,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:45:55,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:55,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:45:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:45:55,703 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:55,738 INFO L93 Difference]: Finished difference Result 241 states and 329 transitions. [2022-02-23 22:45:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:45:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-02-23 22:45:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:55,739 INFO L225 Difference]: With dead ends: 241 [2022-02-23 22:45:55,739 INFO L226 Difference]: Without dead ends: 174 [2022-02-23 22:45:55,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:45:55,740 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:55,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-23 22:45:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-02-23 22:45:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-23 22:45:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-02-23 22:45:55,751 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-02-23 22:45:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:55,751 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-02-23 22:45:55,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-23 22:45:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-02-23 22:45:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 22:45:55,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:55,752 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:55,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:55,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 22:45:55,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-02-23 22:45:55,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:55,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599515978] [2022-02-23 22:45:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:55,972 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:55,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217599985] [2022-02-23 22:45:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:55,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:55,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:55,974 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:55,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 22:45:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:45:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-23 22:45:56,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:56,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:56,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599515978] [2022-02-23 22:45:56,079 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:56,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217599985] [2022-02-23 22:45:56,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217599985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:56,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:56,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:45:56,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954710991] [2022-02-23 22:45:56,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:56,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:45:56,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:45:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:45:56,080 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:45:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:56,114 INFO L93 Difference]: Finished difference Result 239 states and 335 transitions. [2022-02-23 22:45:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:45:56,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-02-23 22:45:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:56,116 INFO L225 Difference]: With dead ends: 239 [2022-02-23 22:45:56,116 INFO L226 Difference]: Without dead ends: 237 [2022-02-23 22:45:56,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:45:56,117 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:56,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-23 22:45:56,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-02-23 22:45:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 22:45:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-02-23 22:45:56,131 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-02-23 22:45:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:56,131 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-02-23 22:45:56,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 22:45:56,132 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-02-23 22:45:56,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 22:45:56,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:56,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:56,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:56,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 22:45:56,348 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-02-23 22:45:56,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:56,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994294348] [2022-02-23 22:45:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:56,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:56,356 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:56,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154026941] [2022-02-23 22:45:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:56,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:56,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:56,358 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:56,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 22:45:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-23 22:45:56,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:56,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:56,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:56,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994294348] [2022-02-23 22:45:56,652 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:56,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154026941] [2022-02-23 22:45:56,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154026941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:56,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:56,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 22:45:56,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883695888] [2022-02-23 22:45:56,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:56,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 22:45:56,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 22:45:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-23 22:45:56,653 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 22:45:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:57,142 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-02-23 22:45:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 22:45:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-02-23 22:45:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:57,144 INFO L225 Difference]: With dead ends: 392 [2022-02-23 22:45:57,144 INFO L226 Difference]: Without dead ends: 390 [2022-02-23 22:45:57,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-23 22:45:57,145 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 170 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:57,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 370 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 22:45:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-23 22:45:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-02-23 22:45:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-02-23 22:45:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-02-23 22:45:57,171 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-02-23 22:45:57,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:57,171 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-02-23 22:45:57,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 22:45:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-02-23 22:45:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 22:45:57,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:57,172 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:57,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:57,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 22:45:57,383 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-02-23 22:45:57,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:57,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025051085] [2022-02-23 22:45:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:57,390 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:57,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334214] [2022-02-23 22:45:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:57,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:57,392 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:57,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 22:45:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 22:45:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 22:45:57,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:57,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:57,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025051085] [2022-02-23 22:45:57,490 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:57,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334214] [2022-02-23 22:45:57,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:57,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:57,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:45:57,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509417849] [2022-02-23 22:45:57,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:57,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:45:57,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:57,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:45:57,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:45:57,491 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 22:45:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:57,549 INFO L93 Difference]: Finished difference Result 566 states and 887 transitions. [2022-02-23 22:45:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:45:57,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-02-23 22:45:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:57,551 INFO L225 Difference]: With dead ends: 566 [2022-02-23 22:45:57,551 INFO L226 Difference]: Without dead ends: 564 [2022-02-23 22:45:57,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:45:57,554 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:57,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:57,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-02-23 22:45:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-02-23 22:45:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-02-23 22:45:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-02-23 22:45:57,600 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-02-23 22:45:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:57,601 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-02-23 22:45:57,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 22:45:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-02-23 22:45:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 22:45:57,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:57,602 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:57,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:57,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 22:45:57,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:57,814 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-02-23 22:45:57,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:57,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53061886] [2022-02-23 22:45:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:57,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:57,820 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:57,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8101906] [2022-02-23 22:45:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:57,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:57,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:57,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 22:45:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 22:45:57,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 22:45:57,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 22:45:58,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:58,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53061886] [2022-02-23 22:45:58,013 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:58,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8101906] [2022-02-23 22:45:58,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8101906] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:58,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:58,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-23 22:45:58,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664938133] [2022-02-23 22:45:58,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:58,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 22:45:58,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 22:45:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:45:58,014 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 22:45:58,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:58,205 INFO L93 Difference]: Finished difference Result 1127 states and 1721 transitions. [2022-02-23 22:45:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 22:45:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-02-23 22:45:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:58,210 INFO L225 Difference]: With dead ends: 1127 [2022-02-23 22:45:58,211 INFO L226 Difference]: Without dead ends: 770 [2022-02-23 22:45:58,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-02-23 22:45:58,213 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 169 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:58,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 342 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-23 22:45:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-02-23 22:45:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-02-23 22:45:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-02-23 22:45:58,295 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-02-23 22:45:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:58,295 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-02-23 22:45:58,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 22:45:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-02-23 22:45:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 22:45:58,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:58,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:58,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:58,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 22:45:58,512 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-02-23 22:45:58,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:58,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766919258] [2022-02-23 22:45:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:58,519 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:58,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47300012] [2022-02-23 22:45:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:58,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:58,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:58,520 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:58,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 22:45:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 22:45:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:58,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:45:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 22:45:58,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:58,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766919258] [2022-02-23 22:45:58,755 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:58,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47300012] [2022-02-23 22:45:58,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47300012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:45:58,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:45:58,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 22:45:58,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369349582] [2022-02-23 22:45:58,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:45:58,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 22:45:58,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:58,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 22:45:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 22:45:58,756 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 22:45:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:59,030 INFO L93 Difference]: Finished difference Result 1597 states and 2379 transitions. [2022-02-23 22:45:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-23 22:45:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-02-23 22:45:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:59,034 INFO L225 Difference]: With dead ends: 1597 [2022-02-23 22:45:59,035 INFO L226 Difference]: Without dead ends: 1119 [2022-02-23 22:45:59,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-02-23 22:45:59,037 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 255 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:59,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 319 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 22:45:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-02-23 22:45:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-02-23 22:45:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-02-23 22:45:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-02-23 22:45:59,138 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-02-23 22:45:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:59,138 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-02-23 22:45:59,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-02-23 22:45:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-02-23 22:45:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 22:45:59,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:59,138 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:59,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:59,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:59,355 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-02-23 22:45:59,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:59,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279915968] [2022-02-23 22:45:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:59,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:59,364 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:59,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175163884] [2022-02-23 22:45:59,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:45:59,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:59,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:59,366 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:59,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 22:45:59,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:45:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:45:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 22:45:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:45:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 22:45:59,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:45:59,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:45:59,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279915968] [2022-02-23 22:45:59,458 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:45:59,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175163884] [2022-02-23 22:45:59,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175163884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:45:59,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:45:59,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:45:59,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426583924] [2022-02-23 22:45:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:45:59,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:45:59,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:45:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:45:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:45:59,459 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:45:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:45:59,591 INFO L93 Difference]: Finished difference Result 1700 states and 2539 transitions. [2022-02-23 22:45:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:45:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-02-23 22:45:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:45:59,596 INFO L225 Difference]: With dead ends: 1700 [2022-02-23 22:45:59,596 INFO L226 Difference]: Without dead ends: 1234 [2022-02-23 22:45:59,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 22:45:59,598 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:45:59,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 195 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:45:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-02-23 22:45:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-02-23 22:45:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-02-23 22:45:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-02-23 22:45:59,681 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-02-23 22:45:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:45:59,681 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-02-23 22:45:59,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-23 22:45:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-02-23 22:45:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-23 22:45:59,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:45:59,682 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:45:59,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 22:45:59,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-23 22:45:59,895 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:45:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:45:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-02-23 22:45:59,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:45:59,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615644904] [2022-02-23 22:45:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:45:59,901 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:45:59,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485071099] [2022-02-23 22:45:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:45:59,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:45:59,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:45:59,910 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:45:59,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 22:45:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:45:59,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-23 22:45:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:46:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 22:46:00,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:46:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 22:46:01,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:46:01,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615644904] [2022-02-23 22:46:01,019 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:46:01,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485071099] [2022-02-23 22:46:01,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485071099] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:46:01,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:46:01,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-02-23 22:46:01,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879344437] [2022-02-23 22:46:01,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:46:01,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 22:46:01,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:46:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 22:46:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-23 22:46:01,021 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-02-23 22:46:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:46:05,540 INFO L93 Difference]: Finished difference Result 1412 states and 2014 transitions. [2022-02-23 22:46:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-23 22:46:05,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-02-23 22:46:05,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:46:05,545 INFO L225 Difference]: With dead ends: 1412 [2022-02-23 22:46:05,545 INFO L226 Difference]: Without dead ends: 1404 [2022-02-23 22:46:05,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-02-23 22:46:05,546 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 186 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:46:05,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 676 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-23 22:46:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-02-23 22:46:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-02-23 22:46:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-02-23 22:46:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-02-23 22:46:05,698 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-02-23 22:46:05,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:46:05,698 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-02-23 22:46:05,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-02-23 22:46:05,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-02-23 22:46:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-23 22:46:05,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:46:05,699 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:46:05,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 22:46:05,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 22:46:05,911 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:46:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:46:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-02-23 22:46:05,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:46:05,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182992190] [2022-02-23 22:46:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:05,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:46:05,917 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:46:05,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1240418526] [2022-02-23 22:46:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:05,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:46:05,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:46:05,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:46:05,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 22:46:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:46:05,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 22:46:05,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:46:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 22:46:06,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:46:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 22:46:06,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:46:06,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182992190] [2022-02-23 22:46:06,228 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:46:06,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240418526] [2022-02-23 22:46:06,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240418526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:46:06,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:46:06,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-02-23 22:46:06,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679873453] [2022-02-23 22:46:06,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:46:06,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 22:46:06,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:46:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 22:46:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-23 22:46:06,230 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 22:46:06,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:46:06,819 INFO L93 Difference]: Finished difference Result 2565 states and 3679 transitions. [2022-02-23 22:46:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-23 22:46:06,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-02-23 22:46:06,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:46:06,828 INFO L225 Difference]: With dead ends: 2565 [2022-02-23 22:46:06,828 INFO L226 Difference]: Without dead ends: 2543 [2022-02-23 22:46:06,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-02-23 22:46:06,829 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 385 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:46:06,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 488 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 22:46:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-02-23 22:46:07,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-02-23 22:46:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-02-23 22:46:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-02-23 22:46:07,141 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-02-23 22:46:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:46:07,141 INFO L470 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-02-23 22:46:07,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 22:46:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-02-23 22:46:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-23 22:46:07,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:46:07,142 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:46:07,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 22:46:07,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 22:46:07,356 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:46:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:46:07,356 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-02-23 22:46:07,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:46:07,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846695908] [2022-02-23 22:46:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:07,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:46:07,361 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:46:07,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639838758] [2022-02-23 22:46:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:07,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:46:07,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:46:07,368 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:46:07,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 22:46:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:46:07,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 22:46:07,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:46:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-02-23 22:46:07,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:46:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-02-23 22:46:07,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:46:07,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846695908] [2022-02-23 22:46:07,666 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:46:07,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639838758] [2022-02-23 22:46:07,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639838758] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 22:46:07,666 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:46:07,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-02-23 22:46:07,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663500724] [2022-02-23 22:46:07,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:46:07,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:46:07,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:46:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:46:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 22:46:07,667 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:46:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:46:07,959 INFO L93 Difference]: Finished difference Result 2467 states and 3485 transitions. [2022-02-23 22:46:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 22:46:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-02-23 22:46:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:46:07,967 INFO L225 Difference]: With dead ends: 2467 [2022-02-23 22:46:07,967 INFO L226 Difference]: Without dead ends: 2465 [2022-02-23 22:46:07,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-23 22:46:07,968 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:46:07,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:46:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-02-23 22:46:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-02-23 22:46:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-02-23 22:46:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-02-23 22:46:08,271 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-02-23 22:46:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:46:08,271 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-02-23 22:46:08,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 22:46:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-02-23 22:46:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-23 22:46:08,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:46:08,272 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:46:08,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-23 22:46:08,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:46:08,487 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:46:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:46:08,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-02-23 22:46:08,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:46:08,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893204500] [2022-02-23 22:46:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:08,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:46:08,493 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:46:08,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193263554] [2022-02-23 22:46:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:08,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:46:08,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:46:08,495 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:46:08,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 22:46:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:46:08,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 22:46:08,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:46:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-02-23 22:46:08,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:46:08,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:46:08,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893204500] [2022-02-23 22:46:08,620 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:46:08,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193263554] [2022-02-23 22:46:08,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193263554] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:46:08,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:46:08,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 22:46:08,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622890821] [2022-02-23 22:46:08,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:46:08,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 22:46:08,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:46:08,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 22:46:08,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 22:46:08,621 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-23 22:46:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:46:08,947 INFO L93 Difference]: Finished difference Result 4377 states and 6175 transitions. [2022-02-23 22:46:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 22:46:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-02-23 22:46:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:46:08,955 INFO L225 Difference]: With dead ends: 4377 [2022-02-23 22:46:08,955 INFO L226 Difference]: Without dead ends: 2578 [2022-02-23 22:46:08,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:46:08,959 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:46:08,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:46:08,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-02-23 22:46:09,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-02-23 22:46:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-02-23 22:46:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-02-23 22:46:09,226 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-02-23 22:46:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:46:09,226 INFO L470 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-02-23 22:46:09,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-23 22:46:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-02-23 22:46:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 22:46:09,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:46:09,227 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:46:09,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-02-23 22:46:09,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:46:09,443 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:46:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:46:09,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-02-23 22:46:09,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:46:09,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105514454] [2022-02-23 22:46:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:09,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:46:09,451 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:46:09,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503856965] [2022-02-23 22:46:09,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:46:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:46:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:46:09,452 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) [2022-02-23 22:46:09,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 22:46:09,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:46:09,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:46:09,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-02-23 22:46:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:46:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-02-23 22:46:10,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:46:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-02-23 22:46:11,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:46:11,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105514454] [2022-02-23 22:46:11,684 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:46:11,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503856965] [2022-02-23 22:46:11,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503856965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:46:11,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:46:11,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-02-23 22:46:11,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513356402] [2022-02-23 22:46:11,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:46:11,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 22:46:11,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:46:11,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 22:46:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-23 22:46:11,685 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 22:46:20,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:46:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:46:27,110 INFO L93 Difference]: Finished difference Result 2869 states and 3894 transitions. [2022-02-23 22:46:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-23 22:46:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-02-23 22:46:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:46:27,119 INFO L225 Difference]: With dead ends: 2869 [2022-02-23 22:46:27,120 INFO L226 Difference]: Without dead ends: 2863 [2022-02-23 22:46:27,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 22:46:27,121 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 297 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 303 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-02-23 22:46:27,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 848 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1024 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2022-02-23 22:46:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-02-23 22:46:27,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-02-23 22:46:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-02-23 22:46:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-02-23 22:46:27,456 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-02-23 22:46:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:46:27,456 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-02-23 22:46:27,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 22:46:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-02-23 22:46:27,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-23 22:46:27,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:46:27,457 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:46:27,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-23 22:46:27,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-23 22:46:27,668 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:46:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:46:27,668 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-02-23 22:46:27,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:46:27,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858621785] [2022-02-23 22:46:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:27,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:46:27,674 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:46:27,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24521263] [2022-02-23 22:46:27,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:46:27,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:46:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:46:27,675 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) [2022-02-23 22:46:27,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-23 22:46:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:46:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-02-23 22:46:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:46:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-02-23 22:46:28,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:46:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-02-23 22:46:33,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:46:33,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858621785] [2022-02-23 22:46:33,764 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:46:33,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24521263] [2022-02-23 22:46:33,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24521263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:46:33,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:46:33,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-02-23 22:46:33,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533441102] [2022-02-23 22:46:33,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:46:33,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-23 22:46:33,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:46:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-23 22:46:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-02-23 22:46:33,766 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-02-23 22:46:43,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:47:02,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:47:22,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:47:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:35,118 INFO L93 Difference]: Finished difference Result 3394 states and 4591 transitions. [2022-02-23 22:47:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-23 22:47:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-02-23 22:47:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:35,128 INFO L225 Difference]: With dead ends: 3394 [2022-02-23 22:47:35,129 INFO L226 Difference]: Without dead ends: 3363 [2022-02-23 22:47:35,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=1865, Invalid=9265, Unknown=0, NotChecked=0, Total=11130 [2022-02-23 22:47:35,132 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 404 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 514 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:35,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 1241 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 1484 Invalid, 2 Unknown, 0 Unchecked, 18.3s Time] [2022-02-23 22:47:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-02-23 22:47:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3022. [2022-02-23 22:47:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 2209 states have (on average 1.2928927116342237) internal successors, (2856), 2253 states have internal predecessors, (2856), 637 states have call successors, (637), 177 states have call predecessors, (637), 175 states have return successors, (630), 591 states have call predecessors, (630), 630 states have call successors, (630) [2022-02-23 22:47:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 4123 transitions. [2022-02-23 22:47:35,669 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 4123 transitions. Word has length 88 [2022-02-23 22:47:35,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:35,669 INFO L470 AbstractCegarLoop]: Abstraction has 3022 states and 4123 transitions. [2022-02-23 22:47:35,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-02-23 22:47:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 4123 transitions. [2022-02-23 22:47:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-23 22:47:35,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:35,676 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:35,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:35,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-23 22:47:35,883 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-02-23 22:47:35,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:35,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500356509] [2022-02-23 22:47:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:35,889 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:35,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568027553] [2022-02-23 22:47:35,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:47:35,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:35,890 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) [2022-02-23 22:47:35,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-23 22:47:35,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 22:47:35,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:47:35,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-23 22:47:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-02-23 22:47:36,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-02-23 22:47:36,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:36,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500356509] [2022-02-23 22:47:36,665 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:36,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568027553] [2022-02-23 22:47:36,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568027553] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:36,665 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:36,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 22:47:36,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865565248] [2022-02-23 22:47:36,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:36,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 22:47:36,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:36,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 22:47:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-23 22:47:36,666 INFO L87 Difference]: Start difference. First operand 3022 states and 4123 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-02-23 22:47:39,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:47:42,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:47:44,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:47:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:46,187 INFO L93 Difference]: Finished difference Result 4014 states and 5476 transitions. [2022-02-23 22:47:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 22:47:46,188 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-02-23 22:47:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:46,199 INFO L225 Difference]: With dead ends: 4014 [2022-02-23 22:47:46,199 INFO L226 Difference]: Without dead ends: 4010 [2022-02-23 22:47:46,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2022-02-23 22:47:46,200 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 167 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 182 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:46,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 780 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 709 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-02-23 22:47:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-02-23 22:47:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3881. [2022-02-23 22:47:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3881 states, 2868 states have (on average 1.304044630404463) internal successors, (3740), 2922 states have internal predecessors, (3740), 798 states have call successors, (798), 216 states have call predecessors, (798), 214 states have return successors, (792), 742 states have call predecessors, (792), 792 states have call successors, (792) [2022-02-23 22:47:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 5330 transitions. [2022-02-23 22:47:46,889 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 5330 transitions. Word has length 97 [2022-02-23 22:47:46,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:46,889 INFO L470 AbstractCegarLoop]: Abstraction has 3881 states and 5330 transitions. [2022-02-23 22:47:46,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-02-23 22:47:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 5330 transitions. [2022-02-23 22:47:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-23 22:47:46,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:46,891 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:46,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:47,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:47,092 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:47,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-02-23 22:47:47,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:47,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742216983] [2022-02-23 22:47:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:47,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:47,112 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:47,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967749991] [2022-02-23 22:47:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:47,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:47,113 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) [2022-02-23 22:47:47,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-23 22:47:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:47:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 22:47:47,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 22:47:47,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 22:47:47,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:47,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742216983] [2022-02-23 22:47:47,568 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:47,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967749991] [2022-02-23 22:47:47,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967749991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:47,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:47,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-02-23 22:47:47,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076630568] [2022-02-23 22:47:47,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:47,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 22:47:47,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 22:47:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-23 22:47:47,569 INFO L87 Difference]: Start difference. First operand 3881 states and 5330 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-02-23 22:47:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:47:49,589 INFO L93 Difference]: Finished difference Result 9527 states and 13744 transitions. [2022-02-23 22:47:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-23 22:47:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-02-23 22:47:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:47:49,619 INFO L225 Difference]: With dead ends: 9527 [2022-02-23 22:47:49,619 INFO L226 Difference]: Without dead ends: 7787 [2022-02-23 22:47:49,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-02-23 22:47:49,623 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 546 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:47:49,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 623 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 22:47:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7787 states. [2022-02-23 22:47:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7787 to 7450. [2022-02-23 22:47:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7450 states, 5201 states have (on average 1.2864833685829649) internal successors, (6691), 5259 states have internal predecessors, (6691), 1859 states have call successors, (1859), 391 states have call predecessors, (1859), 389 states have return successors, (1847), 1799 states have call predecessors, (1847), 1847 states have call successors, (1847) [2022-02-23 22:47:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7450 states to 7450 states and 10397 transitions. [2022-02-23 22:47:51,168 INFO L78 Accepts]: Start accepts. Automaton has 7450 states and 10397 transitions. Word has length 98 [2022-02-23 22:47:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:47:51,168 INFO L470 AbstractCegarLoop]: Abstraction has 7450 states and 10397 transitions. [2022-02-23 22:47:51,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-02-23 22:47:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7450 states and 10397 transitions. [2022-02-23 22:47:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-23 22:47:51,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:47:51,170 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:47:51,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-23 22:47:51,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:51,381 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:47:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:47:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-02-23 22:47:51,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:47:51,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999051648] [2022-02-23 22:47:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:47:51,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:47:51,390 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:47:51,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695553349] [2022-02-23 22:47:51,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:47:51,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:47:51,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:47:51,391 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) [2022-02-23 22:47:51,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-23 22:47:51,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:47:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:47:51,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-02-23 22:47:51,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:47:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-02-23 22:47:52,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:47:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-02-23 22:47:53,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:47:53,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999051648] [2022-02-23 22:47:53,202 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:47:53,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695553349] [2022-02-23 22:47:53,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695553349] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:47:53,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:47:53,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-02-23 22:47:53,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905139640] [2022-02-23 22:47:53,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:47:53,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 22:47:53,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:47:53,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 22:47:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-23 22:47:53,204 INFO L87 Difference]: Start difference. First operand 7450 states and 10397 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-23 22:47:59,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:48:04,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:48:06,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:48:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:08,899 INFO L93 Difference]: Finished difference Result 8624 states and 11995 transitions. [2022-02-23 22:48:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-23 22:48:08,899 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-02-23 22:48:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:08,915 INFO L225 Difference]: With dead ends: 8624 [2022-02-23 22:48:08,915 INFO L226 Difference]: Without dead ends: 8568 [2022-02-23 22:48:08,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-02-23 22:48:08,918 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 199 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 305 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:08,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 957 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1254 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2022-02-23 22:48:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8568 states. [2022-02-23 22:48:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8568 to 7864. [2022-02-23 22:48:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7864 states, 5437 states have (on average 1.2906014346146772) internal successors, (7017), 5493 states have internal predecessors, (7017), 2012 states have call successors, (2012), 415 states have call predecessors, (2012), 414 states have return successors, (2003), 1955 states have call predecessors, (2003), 2003 states have call successors, (2003) [2022-02-23 22:48:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 11032 transitions. [2022-02-23 22:48:10,616 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 11032 transitions. Word has length 108 [2022-02-23 22:48:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:10,617 INFO L470 AbstractCegarLoop]: Abstraction has 7864 states and 11032 transitions. [2022-02-23 22:48:10,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-23 22:48:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 11032 transitions. [2022-02-23 22:48:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-23 22:48:10,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:10,618 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:10,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:10,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-23 22:48:10,831 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-02-23 22:48:10,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:10,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037132942] [2022-02-23 22:48:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:10,837 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:10,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774620052] [2022-02-23 22:48:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:10,841 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) [2022-02-23 22:48:10,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-23 22:48:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:48:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 22:48:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 22:48:11,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 22:48:11,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:11,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037132942] [2022-02-23 22:48:11,412 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:11,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774620052] [2022-02-23 22:48:11,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774620052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:11,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:11,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-23 22:48:11,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069979541] [2022-02-23 22:48:11,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:11,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 22:48:11,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:11,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 22:48:11,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-23 22:48:11,413 INFO L87 Difference]: Start difference. First operand 7864 states and 11032 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-02-23 22:48:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:13,874 INFO L93 Difference]: Finished difference Result 13381 states and 18963 transitions. [2022-02-23 22:48:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-23 22:48:13,874 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-02-23 22:48:13,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:13,897 INFO L225 Difference]: With dead ends: 13381 [2022-02-23 22:48:13,897 INFO L226 Difference]: Without dead ends: 8332 [2022-02-23 22:48:13,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-02-23 22:48:13,908 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 568 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:13,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 753 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 22:48:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8332 states. [2022-02-23 22:48:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8332 to 8156. [2022-02-23 22:48:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8156 states, 5467 states have (on average 1.2088897018474483) internal successors, (6609), 5512 states have internal predecessors, (6609), 2214 states have call successors, (2214), 475 states have call predecessors, (2214), 474 states have return successors, (2205), 2168 states have call predecessors, (2205), 2205 states have call successors, (2205) [2022-02-23 22:48:15,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8156 states to 8156 states and 11028 transitions. [2022-02-23 22:48:15,828 INFO L78 Accepts]: Start accepts. Automaton has 8156 states and 11028 transitions. Word has length 105 [2022-02-23 22:48:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:15,828 INFO L470 AbstractCegarLoop]: Abstraction has 8156 states and 11028 transitions. [2022-02-23 22:48:15,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-02-23 22:48:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 8156 states and 11028 transitions. [2022-02-23 22:48:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-23 22:48:15,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:15,831 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-02-23 22:48:15,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:16,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-23 22:48:16,043 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:16,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2051488100, now seen corresponding path program 1 times [2022-02-23 22:48:16,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:16,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845563196] [2022-02-23 22:48:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:16,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:16,053 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:16,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081832091] [2022-02-23 22:48:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:16,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:16,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:16,056 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) [2022-02-23 22:48:16,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-23 22:48:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:48:16,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 78 conjunts are in the unsatisfiable core [2022-02-23 22:48:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 46 proven. 138 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-02-23 22:48:17,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-02-23 22:48:18,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:18,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845563196] [2022-02-23 22:48:18,281 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:18,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081832091] [2022-02-23 22:48:18,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081832091] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:18,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:18,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 28 [2022-02-23 22:48:18,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272686007] [2022-02-23 22:48:18,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:18,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 22:48:18,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 22:48:18,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-02-23 22:48:18,282 INFO L87 Difference]: Start difference. First operand 8156 states and 11028 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 23 states have internal predecessors, (95), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-23 22:48:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:33,003 INFO L93 Difference]: Finished difference Result 8893 states and 11888 transitions. [2022-02-23 22:48:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-23 22:48:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 23 states have internal predecessors, (95), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) Word has length 127 [2022-02-23 22:48:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:33,021 INFO L225 Difference]: With dead ends: 8893 [2022-02-23 22:48:33,021 INFO L226 Difference]: Without dead ends: 8891 [2022-02-23 22:48:33,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=321, Invalid=2129, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 22:48:33,024 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 255 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:33,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 1490 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-23 22:48:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8891 states. [2022-02-23 22:48:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8891 to 8466. [2022-02-23 22:48:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8466 states, 5751 states have (on average 1.2090071291949227) internal successors, (6953), 5810 states have internal predecessors, (6953), 2181 states have call successors, (2181), 534 states have call predecessors, (2181), 533 states have return successors, (2172), 2121 states have call predecessors, (2172), 2172 states have call successors, (2172) [2022-02-23 22:48:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8466 states to 8466 states and 11306 transitions. [2022-02-23 22:48:35,009 INFO L78 Accepts]: Start accepts. Automaton has 8466 states and 11306 transitions. Word has length 127 [2022-02-23 22:48:35,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:35,009 INFO L470 AbstractCegarLoop]: Abstraction has 8466 states and 11306 transitions. [2022-02-23 22:48:35,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 23 states have internal predecessors, (95), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 7 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-23 22:48:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 8466 states and 11306 transitions. [2022-02-23 22:48:35,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-23 22:48:35,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:35,012 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:48:35,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:35,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-23 22:48:35,227 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-02-23 22:48:35,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:35,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415134442] [2022-02-23 22:48:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:35,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:35,233 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:35,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106057050] [2022-02-23 22:48:35,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:48:35,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:35,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:35,237 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) [2022-02-23 22:48:35,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-23 22:48:35,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:48:35,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:48:35,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-23 22:48:35,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-02-23 22:48:35,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-02-23 22:48:35,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:35,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415134442] [2022-02-23 22:48:35,974 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:35,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106057050] [2022-02-23 22:48:35,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106057050] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:35,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:35,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-02-23 22:48:35,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373197721] [2022-02-23 22:48:35,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:35,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-23 22:48:35,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-23 22:48:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 22:48:35,976 INFO L87 Difference]: Start difference. First operand 8466 states and 11306 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-02-23 22:48:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:40,615 INFO L93 Difference]: Finished difference Result 17320 states and 24392 transitions. [2022-02-23 22:48:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-23 22:48:40,616 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) Word has length 132 [2022-02-23 22:48:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:40,649 INFO L225 Difference]: With dead ends: 17320 [2022-02-23 22:48:40,650 INFO L226 Difference]: Without dead ends: 17278 [2022-02-23 22:48:40,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-02-23 22:48:40,655 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 1076 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:40,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 804 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 22:48:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17278 states. [2022-02-23 22:48:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17278 to 16628. [2022-02-23 22:48:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16628 states, 11754 states have (on average 1.2749702229028417) internal successors, (14986), 11982 states have internal predecessors, (14986), 4065 states have call successors, (4065), 809 states have call predecessors, (4065), 808 states have return successors, (4055), 3836 states have call predecessors, (4055), 4055 states have call successors, (4055) [2022-02-23 22:48:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16628 states to 16628 states and 23106 transitions. [2022-02-23 22:48:44,477 INFO L78 Accepts]: Start accepts. Automaton has 16628 states and 23106 transitions. Word has length 132 [2022-02-23 22:48:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:48:44,477 INFO L470 AbstractCegarLoop]: Abstraction has 16628 states and 23106 transitions. [2022-02-23 22:48:44,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-02-23 22:48:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 16628 states and 23106 transitions. [2022-02-23 22:48:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-23 22:48:44,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:48:44,481 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-02-23 22:48:44,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-23 22:48:44,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-23 22:48:44,697 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:48:44,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:48:44,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1010003828, now seen corresponding path program 2 times [2022-02-23 22:48:44,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:48:44,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077961994] [2022-02-23 22:48:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:48:44,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:48:44,704 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:48:44,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475883767] [2022-02-23 22:48:44,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:48:44,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:48:44,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:48:44,706 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) [2022-02-23 22:48:44,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-23 22:48:44,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:48:44,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:48:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-23 22:48:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:48:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 82 proven. 32 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2022-02-23 22:48:45,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:48:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 90 proven. 17 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2022-02-23 22:48:45,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:48:45,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077961994] [2022-02-23 22:48:45,992 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:48:45,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475883767] [2022-02-23 22:48:45,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475883767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:48:45,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:48:45,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2022-02-23 22:48:45,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283896101] [2022-02-23 22:48:45,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:48:45,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 22:48:45,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:48:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 22:48:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-02-23 22:48:45,993 INFO L87 Difference]: Start difference. First operand 16628 states and 23106 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-02-23 22:48:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:48:58,594 INFO L93 Difference]: Finished difference Result 36677 states and 53830 transitions. [2022-02-23 22:48:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-23 22:48:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 146 [2022-02-23 22:48:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:48:58,678 INFO L225 Difference]: With dead ends: 36677 [2022-02-23 22:48:58,678 INFO L226 Difference]: Without dead ends: 36675 [2022-02-23 22:48:58,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 22:48:58,689 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 190 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-23 22:48:58,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 651 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-23 22:48:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36675 states. [2022-02-23 22:49:07,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36675 to 29279. [2022-02-23 22:49:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29279 states, 18278 states have (on average 1.338603785972207) internal successors, (24467), 18629 states have internal predecessors, (24467), 10031 states have call successors, (10031), 970 states have call predecessors, (10031), 969 states have return successors, (10021), 9679 states have call predecessors, (10021), 10021 states have call successors, (10021) [2022-02-23 22:49:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29279 states to 29279 states and 44519 transitions. [2022-02-23 22:49:08,004 INFO L78 Accepts]: Start accepts. Automaton has 29279 states and 44519 transitions. Word has length 146 [2022-02-23 22:49:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:49:08,005 INFO L470 AbstractCegarLoop]: Abstraction has 29279 states and 44519 transitions. [2022-02-23 22:49:08,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-02-23 22:49:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 29279 states and 44519 transitions. [2022-02-23 22:49:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-02-23 22:49:08,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:49:08,009 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:49:08,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-02-23 22:49:08,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-23 22:49:08,223 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:49:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:49:08,224 INFO L85 PathProgramCache]: Analyzing trace with hash -379915595, now seen corresponding path program 3 times [2022-02-23 22:49:08,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:49:08,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828527462] [2022-02-23 22:49:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:49:08,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:49:08,230 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:49:08,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095613637] [2022-02-23 22:49:08,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:49:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:49:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:49:08,240 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) [2022-02-23 22:49:08,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-23 22:49:08,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 22:49:08,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:49:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 74 conjunts are in the unsatisfiable core [2022-02-23 22:49:08,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:49:09,083 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:49:09,086 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:50:07,158 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:50:07,483 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:50:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 122 proven. 94 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-02-23 22:50:16,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:50:24,327 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 22:50:27,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:50:27,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828527462] [2022-02-23 22:50:27,397 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:50:27,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095613637] [2022-02-23 22:50:27,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095613637] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 22:50:27,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 22:50:27,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-02-23 22:50:27,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522013116] [2022-02-23 22:50:27,398 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 22:50:27,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 22:50:27,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:50:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 22:50:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=509, Unknown=4, NotChecked=0, Total=600 [2022-02-23 22:50:27,398 INFO L87 Difference]: Start difference. First operand 29279 states and 44519 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-23 22:50:39,525 WARN L232 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 88 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 22:50:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:50:51,285 INFO L93 Difference]: Finished difference Result 38259 states and 58452 transitions. [2022-02-23 22:50:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-23 22:50:51,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 148 [2022-02-23 22:50:51,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:50:51,368 INFO L225 Difference]: With dead ends: 38259 [2022-02-23 22:50:51,368 INFO L226 Difference]: Without dead ends: 38257 [2022-02-23 22:50:51,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=158, Invalid=958, Unknown=6, NotChecked=0, Total=1122 [2022-02-23 22:50:51,380 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 136 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 22:50:51,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 695 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 699 Invalid, 0 Unknown, 60 Unchecked, 0.9s Time] [2022-02-23 22:50:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38257 states. [2022-02-23 22:51:00,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38257 to 29889. [2022-02-23 22:51:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29889 states, 18768 states have (on average 1.3331734867860188) internal successors, (25021), 19142 states have internal predecessors, (25021), 10076 states have call successors, (10076), 1045 states have call predecessors, (10076), 1044 states have return successors, (10066), 9701 states have call predecessors, (10066), 10066 states have call successors, (10066) [2022-02-23 22:51:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29889 states to 29889 states and 45163 transitions. [2022-02-23 22:51:00,643 INFO L78 Accepts]: Start accepts. Automaton has 29889 states and 45163 transitions. Word has length 148 [2022-02-23 22:51:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:51:00,643 INFO L470 AbstractCegarLoop]: Abstraction has 29889 states and 45163 transitions. [2022-02-23 22:51:00,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 15 states have internal predecessors, (57), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-02-23 22:51:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 29889 states and 45163 transitions. [2022-02-23 22:51:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-23 22:51:00,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:51:00,648 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:51:00,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-23 22:51:00,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:51:00,863 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:51:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:51:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash 875866272, now seen corresponding path program 4 times [2022-02-23 22:51:00,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:51:00,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871662146] [2022-02-23 22:51:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:51:00,869 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:51:00,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042864694] [2022-02-23 22:51:00,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 22:51:00,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:51:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:51:00,873 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) [2022-02-23 22:51:00,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-23 22:51:01,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 22:51:01,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:51:01,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 111 conjunts are in the unsatisfiable core [2022-02-23 22:51:01,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:51:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 135 proven. 180 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-02-23 22:51:02,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:51:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 191 proven. 32 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-02-23 22:51:03,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:51:03,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871662146] [2022-02-23 22:51:03,861 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:51:03,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042864694] [2022-02-23 22:51:03,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042864694] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:51:03,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:51:03,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-02-23 22:51:03,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888391539] [2022-02-23 22:51:03,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:51:03,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-23 22:51:03,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:51:03,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-23 22:51:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-02-23 22:51:03,863 INFO L87 Difference]: Start difference. First operand 29889 states and 45163 transitions. Second operand has 31 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 15 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) [2022-02-23 22:51:08,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:10,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:11,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:13,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:25,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:27,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:30,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 22:51:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:51:41,604 INFO L93 Difference]: Finished difference Result 31730 states and 47503 transitions. [2022-02-23 22:51:41,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 22:51:41,605 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 15 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) Word has length 155 [2022-02-23 22:51:41,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:51:41,669 INFO L225 Difference]: With dead ends: 31730 [2022-02-23 22:51:41,669 INFO L226 Difference]: Without dead ends: 31728 [2022-02-23 22:51:41,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=500, Invalid=2580, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 22:51:41,678 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 266 mSDsluCounter, 1915 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 430 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 2029 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2022-02-23 22:51:41,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 2029 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2066 Invalid, 4 Unknown, 0 Unchecked, 25.6s Time] [2022-02-23 22:51:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31728 states. [2022-02-23 22:51:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31728 to 30570. [2022-02-23 22:51:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30570 states, 19234 states have (on average 1.3284288239575752) internal successors, (25551), 19610 states have internal predecessors, (25551), 10164 states have call successors, (10164), 1172 states have call predecessors, (10164), 1171 states have return successors, (10154), 9787 states have call predecessors, (10154), 10154 states have call successors, (10154) [2022-02-23 22:51:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30570 states to 30570 states and 45869 transitions. [2022-02-23 22:51:51,440 INFO L78 Accepts]: Start accepts. Automaton has 30570 states and 45869 transitions. Word has length 155 [2022-02-23 22:51:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:51:51,441 INFO L470 AbstractCegarLoop]: Abstraction has 30570 states and 45869 transitions. [2022-02-23 22:51:51,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 26 states have internal predecessors, (104), 15 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (33), 10 states have call predecessors, (33), 13 states have call successors, (33) [2022-02-23 22:51:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 30570 states and 45869 transitions. [2022-02-23 22:51:51,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-02-23 22:51:51,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:51:51,454 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:51:51,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-23 22:51:51,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-02-23 22:51:51,658 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:51:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:51:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1872087437, now seen corresponding path program 1 times [2022-02-23 22:51:51,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:51:51,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928589535] [2022-02-23 22:51:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:51,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:51:51,669 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:51:51,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367925235] [2022-02-23 22:51:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:51:51,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:51:51,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:51:51,670 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) [2022-02-23 22:51:51,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-23 22:51:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:51:51,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-23 22:51:51,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:51:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 63 proven. 897 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-23 22:51:52,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:51:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 63 proven. 257 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-02-23 22:51:52,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:51:52,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928589535] [2022-02-23 22:51:52,836 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:51:52,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367925235] [2022-02-23 22:51:52,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367925235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:51:52,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:51:52,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-02-23 22:51:52,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990109281] [2022-02-23 22:51:52,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:51:52,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-23 22:51:52,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:51:52,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-23 22:51:52,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-02-23 22:51:52,838 INFO L87 Difference]: Start difference. First operand 30570 states and 45869 transitions. Second operand has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-02-23 22:52:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:52:10,562 INFO L93 Difference]: Finished difference Result 57652 states and 89000 transitions. [2022-02-23 22:52:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-23 22:52:10,562 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) Word has length 196 [2022-02-23 22:52:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:52:10,666 INFO L225 Difference]: With dead ends: 57652 [2022-02-23 22:52:10,667 INFO L226 Difference]: Without dead ends: 48821 [2022-02-23 22:52:10,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2609, Invalid=4531, Unknown=0, NotChecked=0, Total=7140 [2022-02-23 22:52:10,696 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 1571 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 1025 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1571 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1025 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 22:52:10,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1571 Valid, 1407 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1025 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 22:52:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48821 states. [2022-02-23 22:52:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48821 to 48084. [2022-02-23 22:52:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48084 states, 29372 states have (on average 1.3269440283262972) internal successors, (38975), 29721 states have internal predecessors, (38975), 16881 states have call successors, (16881), 1831 states have call predecessors, (16881), 1830 states have return successors, (16862), 16531 states have call predecessors, (16862), 16862 states have call successors, (16862) [2022-02-23 22:52:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48084 states to 48084 states and 72718 transitions. [2022-02-23 22:52:27,246 INFO L78 Accepts]: Start accepts. Automaton has 48084 states and 72718 transitions. Word has length 196 [2022-02-23 22:52:27,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:52:27,246 INFO L470 AbstractCegarLoop]: Abstraction has 48084 states and 72718 transitions. [2022-02-23 22:52:27,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-02-23 22:52:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand 48084 states and 72718 transitions. [2022-02-23 22:52:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-02-23 22:52:27,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:52:27,260 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 12, 12, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:52:27,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-23 22:52:27,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:52:27,475 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:52:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:52:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2139737637, now seen corresponding path program 2 times [2022-02-23 22:52:27,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:52:27,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77069948] [2022-02-23 22:52:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:52:27,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:52:27,482 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:52:27,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113888394] [2022-02-23 22:52:27,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:52:27,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:52:27,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:52:27,485 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:52:27,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-23 22:52:27,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:52:27,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:52:27,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-23 22:52:27,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:52:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 101 proven. 950 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-23 22:52:28,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:52:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 101 proven. 310 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-02-23 22:52:28,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:52:28,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77069948] [2022-02-23 22:52:28,713 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:52:28,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113888394] [2022-02-23 22:52:28,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113888394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:52:28,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:52:28,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-02-23 22:52:28,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058080974] [2022-02-23 22:52:28,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:52:28,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 22:52:28,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:52:28,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 22:52:28,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 22:52:28,715 INFO L87 Difference]: Start difference. First operand 48084 states and 72718 transitions. Second operand has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-02-23 22:52:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:52:47,898 INFO L93 Difference]: Finished difference Result 76510 states and 117188 transitions. [2022-02-23 22:52:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-23 22:52:47,898 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) Word has length 207 [2022-02-23 22:52:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:52:48,017 INFO L225 Difference]: With dead ends: 76510 [2022-02-23 22:52:48,017 INFO L226 Difference]: Without dead ends: 49617 [2022-02-23 22:52:48,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3132, Invalid=5424, Unknown=0, NotChecked=0, Total=8556 [2022-02-23 22:52:48,072 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 1542 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 22:52:48,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 1480 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 22:52:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49617 states. [2022-02-23 22:53:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49617 to 49304. [2022-02-23 22:53:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49304 states, 29066 states have (on average 1.2282047753388838) internal successors, (35699), 29237 states have internal predecessors, (35699), 18191 states have call successors, (18191), 2047 states have call predecessors, (18191), 2046 states have return successors, (18174), 18019 states have call predecessors, (18174), 18174 states have call successors, (18174) [2022-02-23 22:53:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49304 states to 49304 states and 72064 transitions. [2022-02-23 22:53:05,384 INFO L78 Accepts]: Start accepts. Automaton has 49304 states and 72064 transitions. Word has length 207 [2022-02-23 22:53:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:53:05,385 INFO L470 AbstractCegarLoop]: Abstraction has 49304 states and 72064 transitions. [2022-02-23 22:53:05,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-02-23 22:53:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 49304 states and 72064 transitions. [2022-02-23 22:53:05,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-02-23 22:53:05,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:53:05,403 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 6, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:53:05,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-23 22:53:05,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:53:05,620 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:53:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:53:05,620 INFO L85 PathProgramCache]: Analyzing trace with hash 641171444, now seen corresponding path program 5 times [2022-02-23 22:53:05,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:53:05,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238381300] [2022-02-23 22:53:05,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:53:05,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:53:05,627 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:53:05,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404799485] [2022-02-23 22:53:05,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 22:53:05,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:53:05,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:53:05,628 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:53:05,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-23 22:53:05,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-02-23 22:53:05,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:53:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 54 conjunts are in the unsatisfiable core [2022-02-23 22:53:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:53:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2574 backedges. 262 proven. 157 refuted. 0 times theorem prover too weak. 2155 trivial. 0 not checked. [2022-02-23 22:53:06,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:53:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2574 backedges. 302 proven. 7 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2022-02-23 22:53:06,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:53:06,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238381300] [2022-02-23 22:53:06,951 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:53:06,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404799485] [2022-02-23 22:53:06,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404799485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:53:06,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:53:06,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 19 [2022-02-23 22:53:06,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861099058] [2022-02-23 22:53:06,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:53:06,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 22:53:06,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:53:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 22:53:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-02-23 22:53:06,952 INFO L87 Difference]: Start difference. First operand 49304 states and 72064 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 11 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 11 states have call successors, (44) [2022-02-23 22:53:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:53:27,940 INFO L93 Difference]: Finished difference Result 59633 states and 86642 transitions. [2022-02-23 22:53:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-23 22:53:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 11 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 11 states have call successors, (44) Word has length 238 [2022-02-23 22:53:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:53:28,080 INFO L225 Difference]: With dead ends: 59633 [2022-02-23 22:53:28,080 INFO L226 Difference]: Without dead ends: 59601 [2022-02-23 22:53:28,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 457 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2022-02-23 22:53:28,099 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 92 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 22:53:28,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 977 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 22:53:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59601 states. [2022-02-23 22:53:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59601 to 33457. [2022-02-23 22:53:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33457 states, 21007 states have (on average 1.1806540676917219) internal successors, (24802), 21300 states have internal predecessors, (24802), 10421 states have call successors, (10421), 2030 states have call predecessors, (10421), 2028 states have return successors, (10418), 10126 states have call predecessors, (10418), 10418 states have call successors, (10418) [2022-02-23 22:53:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33457 states to 33457 states and 45641 transitions. [2022-02-23 22:53:39,439 INFO L78 Accepts]: Start accepts. Automaton has 33457 states and 45641 transitions. Word has length 238 [2022-02-23 22:53:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:53:39,439 INFO L470 AbstractCegarLoop]: Abstraction has 33457 states and 45641 transitions. [2022-02-23 22:53:39,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 11 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 11 states have call successors, (44) [2022-02-23 22:53:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 33457 states and 45641 transitions. [2022-02-23 22:53:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-02-23 22:53:39,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:53:39,463 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 15, 15, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:53:39,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-23 22:53:39,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-02-23 22:53:39,666 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:53:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:53:39,667 INFO L85 PathProgramCache]: Analyzing trace with hash -777184055, now seen corresponding path program 3 times [2022-02-23 22:53:39,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:53:39,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421582496] [2022-02-23 22:53:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:53:39,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:53:39,674 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:53:39,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825251679] [2022-02-23 22:53:39,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:53:39,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:53:39,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:53:39,675 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:53:39,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-23 22:54:17,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 22:54:17,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:54:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 65 conjunts are in the unsatisfiable core [2022-02-23 22:54:17,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:54:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 56 proven. 1955 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-23 22:54:18,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:54:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 56 proven. 611 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-02-23 22:54:19,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:54:19,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421582496] [2022-02-23 22:54:19,024 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:54:19,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825251679] [2022-02-23 22:54:19,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825251679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:54:19,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:54:19,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-02-23 22:54:19,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830732309] [2022-02-23 22:54:19,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:54:19,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 22:54:19,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:54:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 22:54:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 22:54:19,026 INFO L87 Difference]: Start difference. First operand 33457 states and 45641 transitions. Second operand has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) [2022-02-23 22:54:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:54:33,693 INFO L93 Difference]: Finished difference Result 38698 states and 53336 transitions. [2022-02-23 22:54:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-23 22:54:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) Word has length 268 [2022-02-23 22:54:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:54:33,771 INFO L225 Difference]: With dead ends: 38698 [2022-02-23 22:54:33,772 INFO L226 Difference]: Without dead ends: 38688 [2022-02-23 22:54:33,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 482 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3713, Invalid=6387, Unknown=0, NotChecked=0, Total=10100 [2022-02-23 22:54:33,784 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 1730 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 1247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 2478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1247 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:54:33,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1730 Valid, 1234 Invalid, 2478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1247 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 22:54:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38688 states. [2022-02-23 22:54:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38688 to 38045. [2022-02-23 22:54:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38045 states, 24130 states have (on average 1.1937007874015748) internal successors, (28804), 24555 states have internal predecessors, (28804), 11684 states have call successors, (11684), 2232 states have call predecessors, (11684), 2230 states have return successors, (11677), 11257 states have call predecessors, (11677), 11677 states have call successors, (11677) [2022-02-23 22:54:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38045 states to 38045 states and 52165 transitions. [2022-02-23 22:54:46,453 INFO L78 Accepts]: Start accepts. Automaton has 38045 states and 52165 transitions. Word has length 268 [2022-02-23 22:54:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:54:46,454 INFO L470 AbstractCegarLoop]: Abstraction has 38045 states and 52165 transitions. [2022-02-23 22:54:46,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) [2022-02-23 22:54:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38045 states and 52165 transitions. [2022-02-23 22:54:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-02-23 22:54:46,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:54:46,493 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 22, 21, 13, 13, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:54:46,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-23 22:54:46,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-23 22:54:46,703 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:54:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:54:46,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2114344233, now seen corresponding path program 2 times [2022-02-23 22:54:46,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:54:46,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307578417] [2022-02-23 22:54:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:54:46,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:54:46,712 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:54:46,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574349149] [2022-02-23 22:54:46,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 22:54:46,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:54:46,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:54:46,713 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:54:46,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-23 22:54:46,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 22:54:46,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:54:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 91 conjunts are in the unsatisfiable core [2022-02-23 22:54:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:54:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 127 proven. 4165 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-02-23 22:54:47,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:54:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 127 proven. 1285 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-02-23 22:54:48,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:54:48,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307578417] [2022-02-23 22:54:48,532 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:54:48,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574349149] [2022-02-23 22:54:48,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574349149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:54:48,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:54:48,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 54 [2022-02-23 22:54:48,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002487407] [2022-02-23 22:54:48,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:54:48,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 22:54:48,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:54:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 22:54:48,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 22:54:48,533 INFO L87 Difference]: Start difference. First operand 38045 states and 52165 transitions. Second operand has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) [2022-02-23 22:55:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:55:02,894 INFO L93 Difference]: Finished difference Result 41047 states and 56572 transitions. [2022-02-23 22:55:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-23 22:55:02,894 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) Word has length 377 [2022-02-23 22:55:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:55:02,967 INFO L225 Difference]: With dead ends: 41047 [2022-02-23 22:55:02,967 INFO L226 Difference]: Without dead ends: 37107 [2022-02-23 22:55:02,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 700 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3724, Invalid=6376, Unknown=0, NotChecked=0, Total=10100 [2022-02-23 22:55:02,982 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 1837 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 1428 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1837 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 2504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1428 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:55:02,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1837 Valid, 1151 Invalid, 2504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1428 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 22:55:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37107 states. [2022-02-23 22:55:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37107 to 36916. [2022-02-23 22:55:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36916 states, 23118 states have (on average 1.1761398044813565) internal successors, (27190), 23441 states have internal predecessors, (27190), 11561 states have call successors, (11561), 2238 states have call predecessors, (11561), 2236 states have return successors, (11558), 11236 states have call predecessors, (11558), 11558 states have call successors, (11558) [2022-02-23 22:55:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36916 states to 36916 states and 50309 transitions. [2022-02-23 22:55:15,259 INFO L78 Accepts]: Start accepts. Automaton has 36916 states and 50309 transitions. Word has length 377 [2022-02-23 22:55:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:55:15,260 INFO L470 AbstractCegarLoop]: Abstraction has 36916 states and 50309 transitions. [2022-02-23 22:55:15,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) [2022-02-23 22:55:15,260 INFO L276 IsEmpty]: Start isEmpty. Operand 36916 states and 50309 transitions. [2022-02-23 22:55:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-02-23 22:55:15,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:55:15,303 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 24, 24, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:55:15,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-23 22:55:15,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-23 22:55:15,515 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:55:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:55:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2036089593, now seen corresponding path program 3 times [2022-02-23 22:55:15,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:55:15,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096740786] [2022-02-23 22:55:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:55:15,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:55:15,525 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:55:15,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750403123] [2022-02-23 22:55:15,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 22:55:15,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:55:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:55:15,526 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:55:15,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-23 22:55:15,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 22:55:15,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 22:55:15,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 22:55:15,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:55:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2022-02-23 22:55:16,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 22:55:16,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:55:16,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096740786] [2022-02-23 22:55:16,071 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:55:16,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750403123] [2022-02-23 22:55:16,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750403123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 22:55:16,072 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 22:55:16,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 22:55:16,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187912651] [2022-02-23 22:55:16,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 22:55:16,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 22:55:16,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:55:16,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 22:55:16,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-23 22:55:16,073 INFO L87 Difference]: Start difference. First operand 36916 states and 50309 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 22:55:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:55:28,464 INFO L93 Difference]: Finished difference Result 39454 states and 54049 transitions. [2022-02-23 22:55:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 22:55:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 411 [2022-02-23 22:55:28,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:55:28,542 INFO L225 Difference]: With dead ends: 39454 [2022-02-23 22:55:28,542 INFO L226 Difference]: Without dead ends: 37943 [2022-02-23 22:55:28,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 22:55:28,556 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 22 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 22:55:28,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 247 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 22:55:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37943 states. [2022-02-23 22:55:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37943 to 37457. [2022-02-23 22:55:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37457 states, 23368 states have (on average 1.1751540568298529) internal successors, (27461), 23687 states have internal predecessors, (27461), 11779 states have call successors, (11779), 2310 states have call predecessors, (11779), 2309 states have return successors, (11776), 11459 states have call predecessors, (11776), 11776 states have call successors, (11776) [2022-02-23 22:55:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37457 states to 37457 states and 51016 transitions. [2022-02-23 22:55:41,193 INFO L78 Accepts]: Start accepts. Automaton has 37457 states and 51016 transitions. Word has length 411 [2022-02-23 22:55:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:55:41,193 INFO L470 AbstractCegarLoop]: Abstraction has 37457 states and 51016 transitions. [2022-02-23 22:55:41,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 22:55:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 37457 states and 51016 transitions. [2022-02-23 22:55:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-02-23 22:55:41,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:55:41,234 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 25, 25, 13, 13, 13, 13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:55:41,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-23 22:55:41,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:55:41,434 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:55:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:55:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2109653093, now seen corresponding path program 1 times [2022-02-23 22:55:41,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:55:41,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436791803] [2022-02-23 22:55:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:55:41,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:55:41,443 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:55:41,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364725949] [2022-02-23 22:55:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:55:41,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:55:41,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:55:41,445 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:55:41,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-23 22:55:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 22:55:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 97 conjunts are in the unsatisfiable core [2022-02-23 22:55:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 22:55:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5573 backedges. 307 proven. 4994 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-02-23 22:55:42,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 22:55:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5573 backedges. 307 proven. 1474 refuted. 0 times theorem prover too weak. 3792 trivial. 0 not checked. [2022-02-23 22:55:43,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 22:55:43,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436791803] [2022-02-23 22:55:43,402 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 22:55:43,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364725949] [2022-02-23 22:55:43,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364725949] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 22:55:43,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 22:55:43,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 54 [2022-02-23 22:55:43,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742650647] [2022-02-23 22:55:43,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 22:55:43,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 22:55:43,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 22:55:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 22:55:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 22:55:43,404 INFO L87 Difference]: Start difference. First operand 37457 states and 51016 transitions. Second operand has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) [2022-02-23 22:55:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 22:55:57,775 INFO L93 Difference]: Finished difference Result 38227 states and 52112 transitions. [2022-02-23 22:55:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-23 22:55:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) Word has length 416 [2022-02-23 22:55:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 22:55:57,848 INFO L225 Difference]: With dead ends: 38227 [2022-02-23 22:55:57,848 INFO L226 Difference]: Without dead ends: 37152 [2022-02-23 22:55:57,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 778 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3726, Invalid=6374, Unknown=0, NotChecked=0, Total=10100 [2022-02-23 22:55:57,860 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 1425 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 1022 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1022 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 22:55:57,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 1201 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1022 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 22:55:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37152 states. [2022-02-23 22:56:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37152 to 37152. [2022-02-23 22:56:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 23176 states have (on average 1.165688643424232) internal successors, (27016), 23489 states have internal predecessors, (27016), 11699 states have call successors, (11699), 2277 states have call predecessors, (11699), 2276 states have return successors, (11696), 11385 states have call predecessors, (11696), 11696 states have call successors, (11696) [2022-02-23 22:56:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 50411 transitions. [2022-02-23 22:56:09,931 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 50411 transitions. Word has length 416 [2022-02-23 22:56:09,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 22:56:09,931 INFO L470 AbstractCegarLoop]: Abstraction has 37152 states and 50411 transitions. [2022-02-23 22:56:09,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) [2022-02-23 22:56:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 50411 transitions. [2022-02-23 22:56:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-02-23 22:56:09,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 22:56:09,976 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 25, 25, 14, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:56:09,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-23 22:56:10,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-23 22:56:10,177 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 22:56:10,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 22:56:10,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1640866097, now seen corresponding path program 4 times [2022-02-23 22:56:10,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 22:56:10,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462110903] [2022-02-23 22:56:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 22:56:10,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 22:56:10,186 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 22:56:10,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471143796] [2022-02-23 22:56:10,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 22:56:10,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 22:56:10,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 22:56:10,187 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 22:56:10,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-23 22:56:12,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 22:56:12,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-02-23 22:56:12,013 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-23 22:56:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 22:56:12,669 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-23 22:56:12,669 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-23 22:56:12,670 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 22:56:12,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-23 22:56:12,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-23 22:56:12,883 INFO L732 BasicCegarLoop]: Path program histogram: [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 22:56:12,886 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 22:56:13,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:56:13 BasicIcfg [2022-02-23 22:56:13,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 22:56:13,026 INFO L158 Benchmark]: Toolchain (without parser) took 622622.43ms. Allocated memory was 188.7MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 138.1MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-02-23 22:56:13,026 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 188.7MB. Free memory is still 154.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 22:56:13,026 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.52ms. Allocated memory is still 188.7MB. Free memory was 137.9MB in the beginning and 163.3MB in the end (delta: -25.4MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. [2022-02-23 22:56:13,026 INFO L158 Benchmark]: Boogie Preprocessor took 34.88ms. Allocated memory is still 188.7MB. Free memory was 163.3MB in the beginning and 161.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 22:56:13,026 INFO L158 Benchmark]: RCFGBuilder took 316.91ms. Allocated memory is still 188.7MB. Free memory was 161.7MB in the beginning and 149.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 22:56:13,026 INFO L158 Benchmark]: IcfgTransformer took 23.65ms. Allocated memory is still 188.7MB. Free memory was 149.7MB in the beginning and 148.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 22:56:13,026 INFO L158 Benchmark]: TraceAbstraction took 622028.52ms. Allocated memory was 188.7MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 148.1MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. [2022-02-23 22:56:13,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 188.7MB. Free memory is still 154.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.52ms. Allocated memory is still 188.7MB. Free memory was 137.9MB in the beginning and 163.3MB in the end (delta: -25.4MB). Peak memory consumption was 12.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.88ms. Allocated memory is still 188.7MB. Free memory was 163.3MB in the beginning and 161.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 316.91ms. Allocated memory is still 188.7MB. Free memory was 161.7MB in the beginning and 149.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 23.65ms. Allocated memory is still 188.7MB. Free memory was 149.7MB in the beginning and 148.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 622028.52ms. Allocated memory was 188.7MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 148.1MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 1.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=53, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=377, y=610] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=377, y=610] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=377, b=610, counter=0, p=1, q=0, r=0, s=1, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=377, b=610, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=377, b=610, c=377, counter=1, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=610, c=377, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=377, b=610, c=377, counter=2, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=610, b=377, c=377, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=377, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=610, b=377, c=610, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=610, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=610, b=377, c=610, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=610, b=377, c=233, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=233, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=610, b=377, c=233, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=377, b=233, c=233, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=233, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=377, b=233, c=377, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=377, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=377, b=233, c=377, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=377, b=233, c=144, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=144, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=377, b=233, c=144, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=233, b=144, c=144, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=144, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=233, b=144, c=233, counter=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=233, counter=12, counter++=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=233, b=144, c=233, counter=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, counter++=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=233, b=144, c=89, counter=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=89, counter=14, counter++=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=233, b=144, c=89, counter=14, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=144, b=89, c=89, counter=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=89, counter=15, counter++=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=144, b=89, c=144, counter=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=144, counter=16, counter++=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=144, b=89, c=144, counter=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, counter++=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=144, b=89, c=55, counter=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=55, counter=18, counter++=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=144, b=89, c=55, counter=18, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=89, b=55, c=55, counter=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=55, counter=19, counter++=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=89, b=55, c=89, counter=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=89, counter=20, counter++=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=89, b=55, c=89, counter=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, counter++=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=89, b=55, c=34, counter=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=34, counter=22, counter++=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=89, b=55, c=34, counter=22, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=55, b=34, c=34, counter=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=34, counter=23, counter++=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=55, b=34, c=55, counter=23, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=55, counter=24, counter++=23, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=55, b=34, c=55, counter=24, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, counter++=24, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=55, b=34, c=21, counter=25, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=21, counter=26, counter++=25, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=55, b=34, c=21, counter=26, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=34, b=21, c=21, counter=26, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=21, counter=27, counter++=26, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=34, b=21, c=34, counter=27, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=34, counter=28, counter++=27, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=34, b=21, c=34, counter=28, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, counter++=28, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=34, b=21, c=13, counter=29, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=13, counter=30, counter++=29, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=34, b=21, c=13, counter=30, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=21, b=13, c=13, counter=30, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=13, counter=31, counter++=30, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=21, b=13, c=21, counter=31, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=32, counter++=31, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=21, b=13, c=21, counter=32, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, counter++=32, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=21, b=13, c=8, counter=33, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=8, counter=34, counter++=33, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=21, b=13, c=8, counter=34, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=13, b=8, c=8, counter=34, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=8, counter=35, counter++=34, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=8, c=13, counter=35, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=36, counter++=35, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=13, b=8, c=13, counter=36, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, counter++=36, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=13, b=8, c=5, counter=37, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=5, counter=38, counter++=37, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=8, c=5, counter=38, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=8, b=5, c=5, counter=38, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=5, counter=39, counter++=38, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=8, b=5, c=8, counter=39, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=40, counter++=39, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=8, b=5, c=8, counter=40, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, counter++=40, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=8, b=5, c=3, counter=41, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=3, counter=42, counter++=41, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=8, b=5, c=3, counter=42, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=5, b=3, c=3, counter=42, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=43, counter++=42, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=43, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=44, counter++=43, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=44, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, counter++=44, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=45, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=46, counter++=45, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=46, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=3, b=2, c=2, counter=46, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=47, counter++=46, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=3, b=2, c=3, counter=47, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=48, counter++=47, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=3, b=2, c=3, counter=48, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, counter++=48, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=49, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=50, counter++=49, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=50, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=50, d=1, k=1, p=-144, q=233, r=89, s=-144, temp=-55, v=2, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=51, counter++=50, d=1, k=1, p=-144, q=233, r=89, s=-144, temp=-55, v=2, x=377, y=610] [L34] COND FALSE !(counter++<50) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=51] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=51] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 621.8s, OverallIterations: 39, TraceHistogramMax: 49, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.3s, AutomataDifference: 323.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 14164 SdHoareTripleChecker+Valid, 91.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14071 mSDsluCounter, 23681 SdHoareTripleChecker+Invalid, 88.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 60 IncrementalHoareTripleChecker+Unchecked, 20225 mSDsCounter, 10164 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20599 IncrementalHoareTripleChecker+Invalid, 30833 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10164 mSolverCounterUnsat, 3456 mSDtfsCounter, 20599 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8118 GetRequests, 6834 SyntacticMatches, 30 SemanticMatches, 1254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15379 ImplicationChecksByTransitivity, 104.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49304occurred in iteration=33, InterpolantAutomatonStates: 1143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 137.2s AutomataMinimizationTime, 38 MinimizatonAttempts, 49402 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 40.9s SatisfiabilityAnalysisTime, 110.2s InterpolantComputationTime, 4639 NumberOfCodeBlocks, 4137 NumberOfCodeBlocksAsserted, 77 NumberOfCheckSat, 7383 ConstructedInterpolants, 1 QuantifiedInterpolants, 33945 SizeOfPredicates, 395 NumberOfNonLiveVariables, 11059 ConjunctsInSsa, 1335 ConjunctsInUnsatCore, 63 InterpolantComputations, 13 PerfectInterpolantSequences, 29238/47973 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-23 22:56:13,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...