/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/hard2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 12:23:34,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 12:23:34,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 12:23:34,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 12:23:34,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 12:23:34,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 12:23:34,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 12:23:34,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 12:23:34,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 12:23:34,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 12:23:34,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 12:23:34,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 12:23:34,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 12:23:34,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 12:23:34,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 12:23:34,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 12:23:34,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 12:23:34,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 12:23:34,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 12:23:34,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 12:23:34,652 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 12:23:34,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 12:23:34,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 12:23:34,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 12:23:34,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 12:23:34,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 12:23:34,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 12:23:34,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 12:23:34,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 12:23:34,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 12:23:34,690 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 12:23:34,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 12:23:34,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 12:23:34,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 12:23:34,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 12:23:34,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 12:23:34,695 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 12:23:34,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 12:23:34,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 12:23:34,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 12:23:34,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 12:23:34,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 12:23:34,698 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 12:23:34,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 12:23:34,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 12:23:34,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 12:23:34,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 12:23:34,893 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 12:23:34,898 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 12:23:34,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2022-04-06 12:23:34,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2f7226fd/8efb046c2ebd43999c0c3fa1a375c610/FLAG2ef5dd30d [2022-04-06 12:23:35,280 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 12:23:35,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2022-04-06 12:23:35,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2f7226fd/8efb046c2ebd43999c0c3fa1a375c610/FLAG2ef5dd30d [2022-04-06 12:23:35,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2f7226fd/8efb046c2ebd43999c0c3fa1a375c610 [2022-04-06 12:23:35,728 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 12:23:35,729 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 12:23:35,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 12:23:35,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 12:23:35,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 12:23:35,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec35db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35, skipping insertion in model container [2022-04-06 12:23:35,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 12:23:35,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 12:23:35,912 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/hard2_unwindbound10.c[526,539] [2022-04-06 12:23:35,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 12:23:35,941 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 12:23:35,949 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/hard2_unwindbound10.c[526,539] [2022-04-06 12:23:35,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 12:23:35,961 INFO L208 MainTranslator]: Completed translation [2022-04-06 12:23:35,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35 WrapperNode [2022-04-06 12:23:35,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 12:23:35,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 12:23:35,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 12:23:35,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 12:23:35,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 12:23:35,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 12:23:35,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 12:23:35,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 12:23:35,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (1/1) ... [2022-04-06 12:23:35,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 12:23:35,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:36,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 12:23:36,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 12:23:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 12:23:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 12:23:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 12:23:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 12:23:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 12:23:36,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 12:23:36,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 12:23:36,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 12:23:36,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 12:23:36,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 12:23:36,082 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 12:23:36,083 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 12:23:36,184 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 12:23:36,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 12:23:36,189 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 12:23:36,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 12:23:36 BoogieIcfgContainer [2022-04-06 12:23:36,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 12:23:36,203 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 12:23:36,203 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 12:23:36,216 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 12:23:36,218 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 12:23:36" (1/1) ... [2022-04-06 12:23:36,219 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 12:23:36,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 12:23:36 BasicIcfg [2022-04-06 12:23:36,234 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 12:23:36,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 12:23:36,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 12:23:36,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 12:23:36,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 12:23:35" (1/4) ... [2022-04-06 12:23:36,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f01e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 12:23:36, skipping insertion in model container [2022-04-06 12:23:36,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 12:23:35" (2/4) ... [2022-04-06 12:23:36,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f01e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 12:23:36, skipping insertion in model container [2022-04-06 12:23:36,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 12:23:36" (3/4) ... [2022-04-06 12:23:36,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f01e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 12:23:36, skipping insertion in model container [2022-04-06 12:23:36,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 12:23:36" (4/4) ... [2022-04-06 12:23:36,240 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.cqvasr [2022-04-06 12:23:36,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 12:23:36,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 12:23:36,275 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 12:23:36,281 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 12:23:36,281 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 12:23:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 12:23:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 12:23:36,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:36,300 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:36,301 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:36,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2022-04-06 12:23:36,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:36,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810400361] [2022-04-06 12:23:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:36,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:36,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 12:23:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 12:23:36,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:36,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810400361] [2022-04-06 12:23:36,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810400361] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:23:36,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:23:36,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 12:23:36,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416688423] [2022-04-06 12:23:36,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:36,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 12:23:36,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:36,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 12:23:36,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 12:23:36,515 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 12:23:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:36,577 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-04-06 12:23:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 12:23:36,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 12:23:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:36,584 INFO L225 Difference]: With dead ends: 57 [2022-04-06 12:23:36,584 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 12:23:36,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 12:23:36,589 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:36,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:23:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 12:23:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 12:23:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 12:23:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-04-06 12:23:36,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-04-06 12:23:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:36,616 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-04-06 12:23:36,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 12:23:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-04-06 12:23:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 12:23:36,617 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:36,617 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:36,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 12:23:36,617 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:36,618 INFO L85 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2022-04-06 12:23:36,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:36,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567722844] [2022-04-06 12:23:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:36,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 12:23:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 12:23:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567722844] [2022-04-06 12:23:36,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567722844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:23:36,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:23:36,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 12:23:36,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064751053] [2022-04-06 12:23:36,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:36,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 12:23:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 12:23:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 12:23:36,746 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 12:23:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:36,865 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-04-06 12:23:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 12:23:36,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 12:23:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:36,871 INFO L225 Difference]: With dead ends: 41 [2022-04-06 12:23:36,871 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 12:23:36,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:23:36,873 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:36,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 85 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:23:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 12:23:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-04-06 12:23:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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) [2022-04-06 12:23:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-04-06 12:23:36,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-04-06 12:23:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:36,884 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-04-06 12:23:36,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 12:23:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-04-06 12:23:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 12:23:36,884 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:36,884 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:36,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 12:23:36,885 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:36,885 INFO L85 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2022-04-06 12:23:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:36,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209135008] [2022-04-06 12:23:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:36,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 12:23:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 12:23:36,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:36,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209135008] [2022-04-06 12:23:36,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209135008] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:23:36,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:23:36,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 12:23:36,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900782552] [2022-04-06 12:23:36,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:36,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:23:36,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:23:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:23:36,965 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 12:23:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:37,028 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-04-06 12:23:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 12:23:37,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 12:23:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:37,029 INFO L225 Difference]: With dead ends: 46 [2022-04-06 12:23:37,029 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 12:23:37,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 12:23:37,030 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:37,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:23:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 12:23:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 12:23:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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) [2022-04-06 12:23:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 12:23:37,036 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-04-06 12:23:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:37,036 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 12:23:37,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 12:23:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 12:23:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 12:23:37,037 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:37,037 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:37,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 12:23:37,037 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:37,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2022-04-06 12:23:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:37,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721241704] [2022-04-06 12:23:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:37,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:37,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 12:23:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:37,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-04-06 12:23:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 12:23:37,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:37,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721241704] [2022-04-06 12:23:37,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721241704] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:23:37,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:23:37,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 12:23:37,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834157510] [2022-04-06 12:23:37,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:37,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 12:23:37,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:37,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 12:23:37,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 12:23:37,098 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 12:23:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:37,239 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-04-06 12:23:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 12:23:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-04-06 12:23:37,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:37,242 INFO L225 Difference]: With dead ends: 46 [2022-04-06 12:23:37,242 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 12:23:37,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:23:37,252 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:37,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 78 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:23:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 12:23:37,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-04-06 12:23:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 12:23:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-04-06 12:23:37,260 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-04-06 12:23:37,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:37,260 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-04-06 12:23:37,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 12:23:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-04-06 12:23:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 12:23:37,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:37,261 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:37,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 12:23:37,261 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:37,261 INFO L85 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2022-04-06 12:23:37,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:37,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676626621] [2022-04-06 12:23:37,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:37,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:37,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:37,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950290427] [2022-04-06 12:23:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:37,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:37,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:37,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:37,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 12:23:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 12:23:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 12:23:37,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:23:37,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:37,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676626621] [2022-04-06 12:23:37,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:37,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950290427] [2022-04-06 12:23:37,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950290427] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:23:37,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:23:37,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 12:23:37,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152034360] [2022-04-06 12:23:37,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:37,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:23:37,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:37,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:23:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:23:37,477 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 12:23:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:37,515 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-04-06 12:23:37,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:23:37,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 12:23:37,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:37,516 INFO L225 Difference]: With dead ends: 65 [2022-04-06 12:23:37,516 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 12:23:37,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 12:23:37,517 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:37,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:23:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 12:23:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 12:23:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 12:23:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-06 12:23:37,524 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-04-06 12:23:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:37,524 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-06 12:23:37,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 12:23:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-06 12:23:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 12:23:37,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:37,525 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:37,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 12:23:37,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:37,738 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2022-04-06 12:23:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:37,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250314683] [2022-04-06 12:23:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:37,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:37,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:37,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460065019] [2022-04-06 12:23:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:37,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:37,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:37,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:37,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 12:23:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:37,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 12:23:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 12:23:37,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:23:37,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:37,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250314683] [2022-04-06 12:23:37,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:37,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460065019] [2022-04-06 12:23:37,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460065019] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:23:37,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:23:37,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 12:23:37,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778157440] [2022-04-06 12:23:37,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:37,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:23:37,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:23:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:23:37,878 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 12:23:37,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:37,903 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-04-06 12:23:37,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:23:37,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-04-06 12:23:37,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:37,904 INFO L225 Difference]: With dead ends: 70 [2022-04-06 12:23:37,904 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 12:23:37,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:23:37,905 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:37,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:23:37,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 12:23:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 12:23:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 12:23:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-04-06 12:23:37,911 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-04-06 12:23:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:37,911 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-04-06 12:23:37,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 12:23:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-04-06 12:23:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 12:23:37,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:37,912 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:37,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 12:23:38,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 12:23:38,132 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2022-04-06 12:23:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:38,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623069122] [2022-04-06 12:23:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:38,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:38,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772940747] [2022-04-06 12:23:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:38,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:38,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:38,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:38,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 12:23:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:38,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 12:23:38,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 12:23:38,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:23:38,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:38,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623069122] [2022-04-06 12:23:38,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:38,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772940747] [2022-04-06 12:23:38,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772940747] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:23:38,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:23:38,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 12:23:38,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129194856] [2022-04-06 12:23:38,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:38,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:23:38,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:38,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:23:38,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:23:38,304 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 12:23:38,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:38,338 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-04-06 12:23:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:23:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-04-06 12:23:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:38,339 INFO L225 Difference]: With dead ends: 76 [2022-04-06 12:23:38,339 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 12:23:38,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 12:23:38,340 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:38,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 95 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:23:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 12:23:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 12:23:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 12:23:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-04-06 12:23:38,347 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-04-06 12:23:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:38,347 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-04-06 12:23:38,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 12:23:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-04-06 12:23:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 12:23:38,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:38,348 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:38,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 12:23:38,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:38,565 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2022-04-06 12:23:38,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447654282] [2022-04-06 12:23:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:38,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:38,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:38,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062810902] [2022-04-06 12:23:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:38,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:38,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:38,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:38,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 12:23:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 12:23:38,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 12:23:38,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:23:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 12:23:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:38,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447654282] [2022-04-06 12:23:38,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:38,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062810902] [2022-04-06 12:23:38,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062810902] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:23:38,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:23:38,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 12:23:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546278440] [2022-04-06 12:23:38,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:23:38,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 12:23:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 12:23:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 12:23:38,785 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 12:23:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:38,873 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2022-04-06 12:23:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 12:23:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 37 [2022-04-06 12:23:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:38,875 INFO L225 Difference]: With dead ends: 144 [2022-04-06 12:23:38,876 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 12:23:38,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 12:23:38,876 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:38,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 207 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:23:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 12:23:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-04-06 12:23:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 74 states have internal predecessors, (86), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 12:23:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-04-06 12:23:38,887 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 37 [2022-04-06 12:23:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:38,888 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-04-06 12:23:38,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 12:23:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-04-06 12:23:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 12:23:38,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:38,889 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:38,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 12:23:39,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:39,106 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2022-04-06 12:23:39,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:39,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307716318] [2022-04-06 12:23:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:39,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:39,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300626481] [2022-04-06 12:23:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:39,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:39,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:39,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 12:23:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:39,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 12:23:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 12:23:39,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:23:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 12:23:39,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307716318] [2022-04-06 12:23:39,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300626481] [2022-04-06 12:23:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300626481] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 12:23:39,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 12:23:39,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 12:23:39,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526420999] [2022-04-06 12:23:39,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:39,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:23:39,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:39,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:23:39,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 12:23:39,450 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 12:23:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:39,490 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2022-04-06 12:23:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:23:39,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-04-06 12:23:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:39,492 INFO L225 Difference]: With dead ends: 129 [2022-04-06 12:23:39,492 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 12:23:39,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 12:23:39,493 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:39,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:23:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 12:23:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-04-06 12:23:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 81 states have internal predecessors, (92), 27 states have call successors, (27), 18 states have call predecessors, (27), 16 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 12:23:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-04-06 12:23:39,501 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 40 [2022-04-06 12:23:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:39,501 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-04-06 12:23:39,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 12:23:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-04-06 12:23:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 12:23:39,502 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:39,503 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:39,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 12:23:39,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:39,720 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:39,720 INFO L85 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2022-04-06 12:23:39,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:39,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458443616] [2022-04-06 12:23:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:39,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:39,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:39,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671923644] [2022-04-06 12:23:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:39,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:39,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:39,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:39,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 12:23:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 12:23:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 12:23:39,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:23:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 12:23:39,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458443616] [2022-04-06 12:23:39,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671923644] [2022-04-06 12:23:39,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671923644] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:23:39,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:23:39,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 12:23:39,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066803852] [2022-04-06 12:23:39,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:23:39,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 12:23:39,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:39,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 12:23:39,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:23:39,979 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 12:23:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:40,107 INFO L93 Difference]: Finished difference Result 245 states and 298 transitions. [2022-04-06 12:23:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 12:23:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 53 [2022-04-06 12:23:40,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:40,109 INFO L225 Difference]: With dead ends: 245 [2022-04-06 12:23:40,109 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 12:23:40,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-04-06 12:23:40,110 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 80 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:40,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 302 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:23:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 12:23:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2022-04-06 12:23:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 148 states have internal predecessors, (166), 51 states have call successors, (51), 28 states have call predecessors, (51), 26 states have return successors, (46), 40 states have call predecessors, (46), 46 states have call successors, (46) [2022-04-06 12:23:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-04-06 12:23:40,124 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 53 [2022-04-06 12:23:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:40,124 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-04-06 12:23:40,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 8 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 12:23:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-04-06 12:23:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 12:23:40,125 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:40,125 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:40,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 12:23:40,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:40,343 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:40,344 INFO L85 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2022-04-06 12:23:40,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:40,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414996370] [2022-04-06 12:23:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:40,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:40,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:40,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497003799] [2022-04-06 12:23:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:40,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:40,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:40,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 12:23:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:40,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 12:23:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 12:23:40,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:23:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 12:23:41,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414996370] [2022-04-06 12:23:41,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:41,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497003799] [2022-04-06 12:23:41,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497003799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:23:41,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:23:41,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 12:23:41,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642617280] [2022-04-06 12:23:41,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:23:41,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 12:23:41,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 12:23:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:23:41,602 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 12:23:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:45,879 INFO L93 Difference]: Finished difference Result 371 states and 479 transitions. [2022-04-06 12:23:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 12:23:45,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 62 [2022-04-06 12:23:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:45,881 INFO L225 Difference]: With dead ends: 371 [2022-04-06 12:23:45,881 INFO L226 Difference]: Without dead ends: 303 [2022-04-06 12:23:45,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-06 12:23:45,882 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:45,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 204 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 12:23:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-04-06 12:23:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2022-04-06 12:23:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 191 states have internal predecessors, (228), 58 states have call successors, (58), 31 states have call predecessors, (58), 30 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 12:23:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 341 transitions. [2022-04-06 12:23:45,900 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 341 transitions. Word has length 62 [2022-04-06 12:23:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:45,900 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 341 transitions. [2022-04-06 12:23:45,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-04-06 12:23:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 341 transitions. [2022-04-06 12:23:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 12:23:45,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:45,902 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2022-04-06 12:23:45,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 12:23:46,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:46,119 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2022-04-06 12:23:46,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:46,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50376077] [2022-04-06 12:23:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:46,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:46,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:46,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162143543] [2022-04-06 12:23:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:46,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:46,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:46,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:46,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 12:23:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 12:23:46,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 12:23:46,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:23:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-04-06 12:23:46,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:46,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50376077] [2022-04-06 12:23:46,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162143543] [2022-04-06 12:23:46,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162143543] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:23:46,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:23:46,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 12:23:46,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440787076] [2022-04-06 12:23:46,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:23:46,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 12:23:46,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 12:23:46,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-04-06 12:23:46,818 INFO L87 Difference]: Start difference. First operand 274 states and 341 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 12:23:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:47,211 INFO L93 Difference]: Finished difference Result 335 states and 416 transitions. [2022-04-06 12:23:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 12:23:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2022-04-06 12:23:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:47,213 INFO L225 Difference]: With dead ends: 335 [2022-04-06 12:23:47,213 INFO L226 Difference]: Without dead ends: 239 [2022-04-06 12:23:47,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-04-06 12:23:47,214 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:47,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 194 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 12:23:47,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-04-06 12:23:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 223. [2022-04-06 12:23:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 154 states have internal predecessors, (179), 45 states have call successors, (45), 29 states have call predecessors, (45), 27 states have return successors, (42), 39 states have call predecessors, (42), 42 states have call successors, (42) [2022-04-06 12:23:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 266 transitions. [2022-04-06 12:23:47,230 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 266 transitions. Word has length 73 [2022-04-06 12:23:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:47,230 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 266 transitions. [2022-04-06 12:23:47,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 12:23:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 266 transitions. [2022-04-06 12:23:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 12:23:47,231 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:47,231 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:47,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 12:23:47,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 12:23:47,448 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:47,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1139963303, now seen corresponding path program 1 times [2022-04-06 12:23:47,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:47,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981077500] [2022-04-06 12:23:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:47,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:47,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:47,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632083062] [2022-04-06 12:23:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:47,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:47,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:47,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:47,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 12:23:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:23:47,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 12:23:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 12:23:47,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 12:23:47,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:23:47,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981077500] [2022-04-06 12:23:47,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:23:47,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632083062] [2022-04-06 12:23:47,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632083062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 12:23:47,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 12:23:47,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 12:23:47,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376943678] [2022-04-06 12:23:47,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 12:23:47,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 12:23:47,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:23:47,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 12:23:47,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:23:47,688 INFO L87 Difference]: Start difference. First operand 223 states and 266 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 12:23:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:23:47,742 INFO L93 Difference]: Finished difference Result 242 states and 289 transitions. [2022-04-06 12:23:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:23:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-04-06 12:23:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:23:47,744 INFO L225 Difference]: With dead ends: 242 [2022-04-06 12:23:47,744 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 12:23:47,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 12:23:47,744 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 24 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 12:23:47,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 12:23:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 12:23:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2022-04-06 12:23:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 12:23:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2022-04-06 12:23:47,757 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 82 [2022-04-06 12:23:47,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:23:47,757 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2022-04-06 12:23:47,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 12:23:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2022-04-06 12:23:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 12:23:47,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:23:47,758 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:23:47,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 12:23:47,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 12:23:47,975 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:23:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:23:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 2 times [2022-04-06 12:23:47,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:23:47,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888574520] [2022-04-06 12:23:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:23:47,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:23:47,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:23:47,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929679033] [2022-04-06 12:23:47,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 12:23:47,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:23:47,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:23:47,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:23:47,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 12:23:48,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 12:23:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 12:23:48,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 12:23:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:23:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 12:23:48,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:24:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 12:24:04,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:24:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888574520] [2022-04-06 12:24:04,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:24:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929679033] [2022-04-06 12:24:04,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929679033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:24:04,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:24:04,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 12:24:04,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457447797] [2022-04-06 12:24:04,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:24:04,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 12:24:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:24:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 12:24:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 12:24:04,624 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 12:24:18,697 WARN L232 SmtUtils]: Spent 13.73s on a formula simplification. DAG size of input: 192 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 12:24:21,707 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:29,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:31,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:33,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:35,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:37,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:40,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:42,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:44,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:46,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:52,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:24:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:24:52,859 INFO L93 Difference]: Finished difference Result 332 states and 434 transitions. [2022-04-06 12:24:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 12:24:52,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 94 [2022-04-06 12:24:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:24:52,860 INFO L225 Difference]: With dead ends: 332 [2022-04-06 12:24:52,860 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 12:24:52,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=126, Invalid=335, Unknown=1, NotChecked=0, Total=462 [2022-04-06 12:24:52,861 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 130 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 176 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2022-04-06 12:24:52,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 381 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 795 Invalid, 9 Unknown, 0 Unchecked, 26.4s Time] [2022-04-06 12:24:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 12:24:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 257. [2022-04-06 12:24:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.2267441860465116) internal successors, (211), 177 states have internal predecessors, (211), 57 states have call successors, (57), 28 states have call predecessors, (57), 27 states have return successors, (55), 51 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 12:24:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 323 transitions. [2022-04-06 12:24:52,888 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 323 transitions. Word has length 94 [2022-04-06 12:24:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:24:52,888 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 323 transitions. [2022-04-06 12:24:52,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 11 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 12:24:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 323 transitions. [2022-04-06 12:24:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 12:24:52,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:24:52,889 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:24:52,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 12:24:53,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 12:24:53,106 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:24:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:24:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash -105290329, now seen corresponding path program 1 times [2022-04-06 12:24:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:24:53,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343818449] [2022-04-06 12:24:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:24:53,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:24:53,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:24:53,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613855565] [2022-04-06 12:24:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:24:53,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:24:53,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:24:53,128 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:24:53,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 12:24:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:24:53,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 12:24:53,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:24:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 12:24:53,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:24:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-04-06 12:24:53,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:24:53,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343818449] [2022-04-06 12:24:53,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:24:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613855565] [2022-04-06 12:24:53,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613855565] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:24:53,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:24:53,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-04-06 12:24:53,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302660479] [2022-04-06 12:24:53,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:24:53,531 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 12:24:53,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:24:53,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 12:24:53,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 12:24:53,532 INFO L87 Difference]: Start difference. First operand 257 states and 323 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-04-06 12:24:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:24:53,808 INFO L93 Difference]: Finished difference Result 746 states and 1016 transitions. [2022-04-06 12:24:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 12:24:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 100 [2022-04-06 12:24:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:24:53,811 INFO L225 Difference]: With dead ends: 746 [2022-04-06 12:24:53,811 INFO L226 Difference]: Without dead ends: 659 [2022-04-06 12:24:53,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-04-06 12:24:53,812 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 177 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 12:24:53,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 378 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 12:24:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-04-06 12:24:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 552. [2022-04-06 12:24:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 361 states have (on average 1.2825484764542936) internal successors, (463), 378 states have internal predecessors, (463), 136 states have call successors, (136), 56 states have call predecessors, (136), 54 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-04-06 12:24:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 730 transitions. [2022-04-06 12:24:53,860 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 730 transitions. Word has length 100 [2022-04-06 12:24:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:24:53,860 INFO L478 AbstractCegarLoop]: Abstraction has 552 states and 730 transitions. [2022-04-06 12:24:53,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 12 states have call successors, (32), 8 states have call predecessors, (32), 8 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-04-06 12:24:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 730 transitions. [2022-04-06 12:24:53,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 12:24:53,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:24:53,861 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:24:53,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 12:24:54,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 12:24:54,079 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:24:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:24:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 331614142, now seen corresponding path program 1 times [2022-04-06 12:24:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:24:54,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065626350] [2022-04-06 12:24:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:24:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:24:54,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:24:54,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859821845] [2022-04-06 12:24:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:24:54,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:24:54,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:24:54,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:24:54,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 12:24:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:24:54,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 12:24:54,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:24:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 12:24:54,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:24:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 12:24:54,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:24:54,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065626350] [2022-04-06 12:24:54,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:24:54,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859821845] [2022-04-06 12:24:54,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859821845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:24:54,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:24:54,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-06 12:24:54,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882254133] [2022-04-06 12:24:54,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:24:54,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 12:24:54,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:24:54,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 12:24:54,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-04-06 12:24:54,544 INFO L87 Difference]: Start difference. First operand 552 states and 730 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-04-06 12:24:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:24:54,786 INFO L93 Difference]: Finished difference Result 704 states and 943 transitions. [2022-04-06 12:24:54,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 12:24:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 108 [2022-04-06 12:24:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:24:54,789 INFO L225 Difference]: With dead ends: 704 [2022-04-06 12:24:54,789 INFO L226 Difference]: Without dead ends: 667 [2022-04-06 12:24:54,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2022-04-06 12:24:54,790 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 173 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:24:54,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 373 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:24:54,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-04-06 12:24:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 651. [2022-04-06 12:24:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 439 states have (on average 1.2277904328018223) internal successors, (539), 452 states have internal predecessors, (539), 155 states have call successors, (155), 58 states have call predecessors, (155), 56 states have return successors, (150), 140 states have call predecessors, (150), 150 states have call successors, (150) [2022-04-06 12:24:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 844 transitions. [2022-04-06 12:24:54,839 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 844 transitions. Word has length 108 [2022-04-06 12:24:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:24:54,840 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 844 transitions. [2022-04-06 12:24:54,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 12 states have call successors, (34), 9 states have call predecessors, (34), 8 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-04-06 12:24:54,840 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 844 transitions. [2022-04-06 12:24:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 12:24:54,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:24:54,843 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 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] [2022-04-06 12:24:54,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 12:24:55,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 12:24:55,071 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:24:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:24:55,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1288142005, now seen corresponding path program 1 times [2022-04-06 12:24:55,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:24:55,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24867054] [2022-04-06 12:24:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:24:55,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:24:55,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:24:55,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613934350] [2022-04-06 12:24:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:24:55,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:24:55,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:24:55,080 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:24:55,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 12:24:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 12:24:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 12:24:55,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:24:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 12:24:55,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:24:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 34 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 12:24:56,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:24:56,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24867054] [2022-04-06 12:24:56,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:24:56,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613934350] [2022-04-06 12:24:56,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613934350] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:24:56,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:24:56,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 12:24:56,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192690234] [2022-04-06 12:24:56,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:24:56,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 12:24:56,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:24:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 12:24:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-04-06 12:24:56,150 INFO L87 Difference]: Start difference. First operand 651 states and 844 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-04-06 12:24:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:24:56,414 INFO L93 Difference]: Finished difference Result 657 states and 850 transitions. [2022-04-06 12:24:56,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 12:24:56,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) Word has length 110 [2022-04-06 12:24:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:24:56,423 INFO L225 Difference]: With dead ends: 657 [2022-04-06 12:24:56,423 INFO L226 Difference]: Without dead ends: 651 [2022-04-06 12:24:56,423 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 12:24:56,424 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 3 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 12:24:56,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 295 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 12:24:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-04-06 12:24:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 651. [2022-04-06 12:24:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 439 states have (on average 1.2232346241457859) internal successors, (537), 452 states have internal predecessors, (537), 155 states have call successors, (155), 58 states have call predecessors, (155), 56 states have return successors, (150), 140 states have call predecessors, (150), 150 states have call successors, (150) [2022-04-06 12:24:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 842 transitions. [2022-04-06 12:24:56,490 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 842 transitions. Word has length 110 [2022-04-06 12:24:56,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:24:56,490 INFO L478 AbstractCegarLoop]: Abstraction has 651 states and 842 transitions. [2022-04-06 12:24:56,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 7 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 7 states have call predecessors, (33), 7 states have call successors, (33) [2022-04-06 12:24:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 842 transitions. [2022-04-06 12:24:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 12:24:56,491 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:24:56,491 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:24:56,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 12:24:56,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 12:24:56,708 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:24:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:24:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash 848408867, now seen corresponding path program 2 times [2022-04-06 12:24:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:24:56,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538881229] [2022-04-06 12:24:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:24:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:24:56,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:24:56,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430348389] [2022-04-06 12:24:56,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 12:24:56,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:24:56,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:24:56,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:24:56,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 12:24:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 12:24:56,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 12:24:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 12:24:56,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:24:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2022-04-06 12:24:56,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:24:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 69 proven. 18 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 12:24:57,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:24:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538881229] [2022-04-06 12:24:57,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:24:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430348389] [2022-04-06 12:24:57,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430348389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:24:57,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:24:57,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 12:24:57,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472947623] [2022-04-06 12:24:57,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:24:57,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 12:24:57,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:24:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 12:24:57,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 12:24:57,265 INFO L87 Difference]: Start difference. First operand 651 states and 842 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-04-06 12:24:57,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:24:57,378 INFO L93 Difference]: Finished difference Result 754 states and 969 transitions. [2022-04-06 12:24:57,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 12:24:57,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) Word has length 124 [2022-04-06 12:24:57,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:24:57,381 INFO L225 Difference]: With dead ends: 754 [2022-04-06 12:24:57,381 INFO L226 Difference]: Without dead ends: 533 [2022-04-06 12:24:57,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 12:24:57,382 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 4 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:24:57,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 197 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:24:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-04-06 12:24:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 531. [2022-04-06 12:24:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 356 states have (on average 1.1882022471910112) internal successors, (423), 369 states have internal predecessors, (423), 121 states have call successors, (121), 55 states have call predecessors, (121), 53 states have return successors, (116), 106 states have call predecessors, (116), 116 states have call successors, (116) [2022-04-06 12:24:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 660 transitions. [2022-04-06 12:24:57,421 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 660 transitions. Word has length 124 [2022-04-06 12:24:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:24:57,423 INFO L478 AbstractCegarLoop]: Abstraction has 531 states and 660 transitions. [2022-04-06 12:24:57,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 9 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 9 states have call predecessors, (35), 9 states have call successors, (35) [2022-04-06 12:24:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 660 transitions. [2022-04-06 12:24:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-04-06 12:24:57,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:24:57,425 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:24:57,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 12:24:57,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:24:57,642 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:24:57,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:24:57,643 INFO L85 PathProgramCache]: Analyzing trace with hash 722879610, now seen corresponding path program 3 times [2022-04-06 12:24:57,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:24:57,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692447170] [2022-04-06 12:24:57,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:24:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:24:57,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:24:57,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208620426] [2022-04-06 12:24:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 12:24:57,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:24:57,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:24:57,655 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:24:57,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 12:24:57,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 12:24:57,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 12:24:57,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 12:24:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:24:58,156 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 12:24:58,172 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 12:24:58,199 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 12:24:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-04-06 12:24:58,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:25:18,984 WARN L855 $PredicateComparison]: unable to prove that (or (= c_main_~p~0 1) (let ((.cse9 (* c_main_~p~0 c_main_~B~0))) (let ((.cse4 (= (mod .cse9 2) 0)) (.cse10 (< .cse9 0))) (let ((.cse6 (= (mod c_main_~p~0 2) 0)) (.cse3 (not .cse10)) (.cse0 (and .cse10 (not .cse4))) (.cse1 (* (- 1) (div .cse9 2))) (.cse5 (div c_main_~p~0 2)) (.cse7 (< c_main_~p~0 0))) (and (or (let ((.cse2 (* (+ c_main_~q~0 .cse5) c_main_~B~0))) (and (or .cse0 (= (+ .cse1 c_main_~r~0 .cse2) c_main_~A~0)) (or .cse3 (= c_main_~A~0 (+ (- 1) .cse1 c_main_~r~0 .cse2)) .cse4))) (and (not .cse6) .cse7)) (or .cse6 (let ((.cse8 (* (+ c_main_~q~0 .cse5 1) c_main_~B~0))) (and (or .cse3 .cse4 (= c_main_~A~0 (+ (- 1) .cse1 .cse8 c_main_~r~0))) (or .cse0 (= c_main_~A~0 (+ .cse1 .cse8 c_main_~r~0))))) (not .cse7))))))) is different from true [2022-04-06 12:29:08,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:29:08,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692447170] [2022-04-06 12:29:08,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:29:08,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208620426] [2022-04-06 12:29:08,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208620426] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 12:29:08,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 12:29:08,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 12:29:08,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467834817] [2022-04-06 12:29:08,809 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 12:29:08,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 12:29:08,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:29:08,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 12:29:08,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2022-04-06 12:29:08,810 INFO L87 Difference]: Start difference. First operand 531 states and 660 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 12:29:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:29:08,947 INFO L93 Difference]: Finished difference Result 545 states and 673 transitions. [2022-04-06 12:29:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 12:29:08,948 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 126 [2022-04-06 12:29:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:29:08,963 INFO L225 Difference]: With dead ends: 545 [2022-04-06 12:29:08,963 INFO L226 Difference]: Without dead ends: 539 [2022-04-06 12:29:08,964 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=60, Invalid=215, Unknown=1, NotChecked=30, Total=306 [2022-04-06 12:29:08,965 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:29:08,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:29:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-04-06 12:29:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 441. [2022-04-06 12:29:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 298 states have (on average 1.157718120805369) internal successors, (345), 300 states have internal predecessors, (345), 93 states have call successors, (93), 51 states have call predecessors, (93), 49 states have return successors, (90), 89 states have call predecessors, (90), 90 states have call successors, (90) [2022-04-06 12:29:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 528 transitions. [2022-04-06 12:29:08,998 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 528 transitions. Word has length 126 [2022-04-06 12:29:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:29:09,000 INFO L478 AbstractCegarLoop]: Abstraction has 441 states and 528 transitions. [2022-04-06 12:29:09,000 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 12:29:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 528 transitions. [2022-04-06 12:29:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 12:29:09,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:29:09,002 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:29:09,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 12:29:09,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:29:09,215 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:29:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:29:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1722143882, now seen corresponding path program 3 times [2022-04-06 12:29:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:29:09,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131896211] [2022-04-06 12:29:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:29:09,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:29:09,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:29:09,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478774464] [2022-04-06 12:29:09,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 12:29:09,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:29:09,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:29:09,223 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:29:09,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 12:29:09,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 12:29:09,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 12:29:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 12:29:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:29:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-04-06 12:29:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:29:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-04-06 12:29:09,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:29:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131896211] [2022-04-06 12:29:09,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:29:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478774464] [2022-04-06 12:29:09,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478774464] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:29:09,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:29:09,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 12:29:09,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047150986] [2022-04-06 12:29:09,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:29:09,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 12:29:09,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:29:09,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 12:29:09,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-04-06 12:29:09,667 INFO L87 Difference]: Start difference. First operand 441 states and 528 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 12:29:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:29:09,817 INFO L93 Difference]: Finished difference Result 485 states and 563 transitions. [2022-04-06 12:29:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 12:29:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 128 [2022-04-06 12:29:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:29:09,819 INFO L225 Difference]: With dead ends: 485 [2022-04-06 12:29:09,819 INFO L226 Difference]: Without dead ends: 469 [2022-04-06 12:29:09,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 12:29:09,820 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:29:09,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 93 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:29:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-04-06 12:29:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 357. [2022-04-06 12:29:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 240 states have (on average 1.0958333333333334) internal successors, (263), 247 states have internal predecessors, (263), 67 states have call successors, (67), 50 states have call predecessors, (67), 49 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2022-04-06 12:29:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 395 transitions. [2022-04-06 12:29:09,853 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 395 transitions. Word has length 128 [2022-04-06 12:29:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:29:09,853 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 395 transitions. [2022-04-06 12:29:09,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 12:29:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 395 transitions. [2022-04-06 12:29:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-04-06 12:29:09,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:29:09,855 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:29:09,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 12:29:10,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:29:10,071 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:29:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:29:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1538719799, now seen corresponding path program 2 times [2022-04-06 12:29:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:29:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989717045] [2022-04-06 12:29:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:29:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:29:10,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:29:10,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634775765] [2022-04-06 12:29:10,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 12:29:10,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:29:10,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:29:10,096 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:29:10,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 12:29:10,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 12:29:10,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 12:29:10,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 12:29:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:29:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 417 proven. 69 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-04-06 12:29:10,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:29:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 105 proven. 69 refuted. 0 times theorem prover too weak. 1116 trivial. 0 not checked. [2022-04-06 12:29:10,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:29:10,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989717045] [2022-04-06 12:29:10,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:29:10,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634775765] [2022-04-06 12:29:10,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634775765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:29:10,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:29:10,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-04-06 12:29:10,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581254198] [2022-04-06 12:29:10,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:29:10,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 12:29:10,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:29:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 12:29:10,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 12:29:10,594 INFO L87 Difference]: Start difference. First operand 357 states and 395 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-04-06 12:29:10,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:29:10,699 INFO L93 Difference]: Finished difference Result 448 states and 507 transitions. [2022-04-06 12:29:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 12:29:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 168 [2022-04-06 12:29:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:29:10,701 INFO L225 Difference]: With dead ends: 448 [2022-04-06 12:29:10,701 INFO L226 Difference]: Without dead ends: 329 [2022-04-06 12:29:10,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 326 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 12:29:10,702 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 12:29:10,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 317 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 12:29:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-04-06 12:29:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-04-06 12:29:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 221 states have (on average 1.090497737556561) internal successors, (241), 227 states have internal predecessors, (241), 61 states have call successors, (61), 47 states have call predecessors, (61), 46 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-04-06 12:29:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 361 transitions. [2022-04-06 12:29:10,728 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 361 transitions. Word has length 168 [2022-04-06 12:29:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:29:10,728 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 361 transitions. [2022-04-06 12:29:10,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 9 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2022-04-06 12:29:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 361 transitions. [2022-04-06 12:29:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-04-06 12:29:10,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:29:10,729 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:29:10,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 12:29:10,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:29:10,944 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:29:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:29:10,944 INFO L85 PathProgramCache]: Analyzing trace with hash 885039068, now seen corresponding path program 3 times [2022-04-06 12:29:10,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:29:10,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157677003] [2022-04-06 12:29:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:29:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:29:10,950 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:29:10,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1266701447] [2022-04-06 12:29:10,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 12:29:10,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:29:10,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:29:10,951 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:29:10,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 12:29:11,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-04-06 12:29:11,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 12:29:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 12:29:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 12:29:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 130 proven. 122 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-04-06 12:29:11,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 12:30:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 136 proven. 116 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-04-06 12:30:03,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 12:30:03,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157677003] [2022-04-06 12:30:03,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 12:30:03,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266701447] [2022-04-06 12:30:03,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266701447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 12:30:03,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 12:30:03,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2022-04-06 12:30:03,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888026354] [2022-04-06 12:30:03,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 12:30:03,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 12:30:03,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 12:30:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 12:30:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-04-06 12:30:03,122 INFO L87 Difference]: Start difference. First operand 329 states and 361 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) [2022-04-06 12:30:05,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:30:08,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 12:30:08,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 12:30:08,467 INFO L93 Difference]: Finished difference Result 402 states and 456 transitions. [2022-04-06 12:30:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 12:30:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) Word has length 172 [2022-04-06 12:30:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 12:30:08,481 INFO L225 Difference]: With dead ends: 402 [2022-04-06 12:30:08,481 INFO L226 Difference]: Without dead ends: 301 [2022-04-06 12:30:08,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 321 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-04-06 12:30:08,482 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 30 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-04-06 12:30:08,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 397 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 633 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-04-06 12:30:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-04-06 12:30:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2022-04-06 12:30:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 202 states have (on average 1.0841584158415842) internal successors, (219), 207 states have internal predecessors, (219), 55 states have call successors, (55), 44 states have call predecessors, (55), 43 states have return successors, (53), 49 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 12:30:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 327 transitions. [2022-04-06 12:30:08,519 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 327 transitions. Word has length 172 [2022-04-06 12:30:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 12:30:08,520 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 327 transitions. [2022-04-06 12:30:08,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 17 states have internal predecessors, (82), 14 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (49), 15 states have call predecessors, (49), 13 states have call successors, (49) [2022-04-06 12:30:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 327 transitions. [2022-04-06 12:30:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 12:30:08,522 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 12:30:08,522 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:30:08,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 12:30:08,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:30:08,739 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 12:30:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 12:30:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash 87753903, now seen corresponding path program 4 times [2022-04-06 12:30:08,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 12:30:08,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898320728] [2022-04-06 12:30:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 12:30:08,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 12:30:08,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 12:30:08,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085586840] [2022-04-06 12:30:08,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 12:30:08,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:30:08,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 12:30:08,747 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 12:30:08,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 12:30:08,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 12:30:08,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-06 12:30:08,848 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 12:30:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 12:30:08,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 12:30:08,940 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 12:30:08,941 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 12:30:08,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 12:30:09,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 12:30:09,163 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 12:30:09,165 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 12:30:09,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 12:30:09 BasicIcfg [2022-04-06 12:30:09,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 12:30:09,219 INFO L158 Benchmark]: Toolchain (without parser) took 393487.09ms. Allocated memory was 169.9MB in the beginning and 354.4MB in the end (delta: 184.5MB). Free memory was 120.9MB in the beginning and 280.7MB in the end (delta: -159.8MB). Peak memory consumption was 26.1MB. Max. memory is 8.0GB. [2022-04-06 12:30:09,219 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 169.9MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 12:30:09,219 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.32ms. Allocated memory is still 169.9MB. Free memory was 120.8MB in the beginning and 148.8MB in the end (delta: -28.1MB). Peak memory consumption was 6.1MB. Max. memory is 8.0GB. [2022-04-06 12:30:09,219 INFO L158 Benchmark]: Boogie Preprocessor took 20.81ms. Allocated memory is still 169.9MB. Free memory was 148.8MB in the beginning and 147.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 12:30:09,219 INFO L158 Benchmark]: RCFGBuilder took 218.54ms. Allocated memory is still 169.9MB. Free memory was 147.3MB in the beginning and 136.4MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 12:30:09,219 INFO L158 Benchmark]: IcfgTransformer took 31.45ms. Allocated memory is still 169.9MB. Free memory was 136.4MB in the beginning and 135.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 12:30:09,219 INFO L158 Benchmark]: TraceAbstraction took 392980.46ms. Allocated memory was 169.9MB in the beginning and 354.4MB in the end (delta: 184.5MB). Free memory was 134.7MB in the beginning and 280.7MB in the end (delta: -146.0MB). Peak memory consumption was 40.1MB. Max. memory is 8.0GB. [2022-04-06 12:30:09,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 169.9MB. Free memory is still 137.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 231.32ms. Allocated memory is still 169.9MB. Free memory was 120.8MB in the beginning and 148.8MB in the end (delta: -28.1MB). Peak memory consumption was 6.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.81ms. Allocated memory is still 169.9MB. Free memory was 148.8MB in the beginning and 147.5MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 218.54ms. Allocated memory is still 169.9MB. Free memory was 147.3MB in the beginning and 136.4MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 31.45ms. Allocated memory is still 169.9MB. Free memory was 136.4MB in the beginning and 135.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 392980.46ms. Allocated memory was 169.9MB in the beginning and 354.4MB in the end (delta: 184.5MB). Free memory was 134.7MB in the beginning and 280.7MB in the end (delta: -146.0MB). Peak memory consumption was 40.1MB. 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: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [\old(counter)=0, A=31, B=1, counter=0, d=1, p=1, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=1, d=1, p=1, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=1, d=2, p=2, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=2, d=2, p=2, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=2, d=4, p=4, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=3, d=4, p=4, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=3, d=8, p=8, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=4, d=8, p=8, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=4, d=16, p=16, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=5, counter++=4, d=16, p=16, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=5, d=16, p=16, q=0, r=31] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [\old(counter)=0, A=31, B=1, counter=5, d=32, p=32, q=0, r=31] [L34] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=6, counter++=5, d=32, p=32, q=0, r=31] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L35] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L36] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L38] COND TRUE !(r >= d) VAL [\old(counter)=0, A=31, B=1, counter=6, d=32, p=32, q=0, r=31] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=7, counter++=6, d=32, p=32, q=0, r=31] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=7, d=32, p=32, q=0, r=31] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=7, d=32, p=32, q=0, r=31] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=7, d=16, p=16, q=0, r=31] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=7, d=16, p=16, q=16, r=15] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=8, counter++=7, d=16, p=16, q=16, r=15] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=8, d=16, p=16, q=16, r=15] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=8, d=16, p=16, q=16, r=15] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=8, d=8, p=8, q=16, r=15] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=8, d=8, p=8, q=24, r=7] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=9, counter++=8, d=8, p=8, q=24, r=7] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=9, d=8, p=8, q=24, r=7] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=9, d=8, p=8, q=24, r=7] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=9, d=4, p=4, q=24, r=7] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=9, d=4, p=4, q=28, r=3] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=10, counter++=9, d=4, p=4, q=28, r=3] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=31, B=1, counter=10, d=4, p=4, q=28, r=3] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L46] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=31, B=1, counter=10, d=4, p=4, q=28, r=3] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 VAL [\old(counter)=0, A=31, B=1, counter=10, d=2, p=2, q=28, r=3] [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [\old(counter)=0, A=31, B=1, counter=10, d=2, p=2, q=30, r=1] [L44] EXPR counter++ VAL [\old(counter)=0, A=31, B=1, counter=11, counter++=10, d=2, p=2, q=30, r=1] [L44] COND FALSE !(counter++<10) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 392.9s, OverallIterations: 23, TraceHistogramMax: 27, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 60.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 1004 SdHoareTripleChecker+Valid, 33.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 931 mSDsluCounter, 4255 SdHoareTripleChecker+Invalid, 33.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3181 mSDsCounter, 696 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3844 IncrementalHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 696 mSolverCounterUnsat, 1074 mSDtfsCounter, 3844 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2915 GetRequests, 2665 SyntacticMatches, 30 SemanticMatches, 220 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 38.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=651occurred in iteration=16, InterpolantAutomatonStates: 192, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 22 MinimizatonAttempts, 440 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 326.0s InterpolantComputationTime, 1790 NumberOfCodeBlocks, 1664 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2848 ConstructedInterpolants, 0 QuantifiedInterpolants, 40651 SizeOfPredicates, 48 NumberOfNonLiveVariables, 3901 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 12686/14119 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 12:30:09,384 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...