/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/cohencu-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 09:31:13,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 09:31:13,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 09:31:13,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 09:31:13,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 09:31:13,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 09:31:13,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 09:31:13,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 09:31:13,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 09:31:13,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 09:31:13,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 09:31:13,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 09:31:13,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 09:31:13,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 09:31:13,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 09:31:13,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 09:31:13,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 09:31:13,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 09:31:13,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 09:31:13,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 09:31:13,205 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 09:31:13,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 09:31:13,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 09:31:13,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 09:31:13,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 09:31:13,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 09:31:13,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 09:31:13,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 09:31:13,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 09:31:13,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 09:31:13,257 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 09:31:13,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 09:31:13,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 09:31:13,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 09:31:13,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 09:31:13,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 09:31:13,262 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 09:31:13,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 09:31:13,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 09:31:13,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 09:31:13,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:31:13,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 09:31:13,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 09:31:13,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 09:31:13,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 09:31:13,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 09:31:13,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 09:31:13,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 09:31:13,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 09:31:13,265 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 09:31:13,265 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 09:31:13,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 09:31:13,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 09:31:13,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 09:31:13,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 09:31:13,469 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 09:31:13,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c [2022-03-20 09:31:13,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ffe76c42/55fa1f8f79794d8bb7cb0e84a863b87f/FLAGb96910974 [2022-03-20 09:31:13,852 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 09:31:13,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound2.c [2022-03-20 09:31:13,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ffe76c42/55fa1f8f79794d8bb7cb0e84a863b87f/FLAGb96910974 [2022-03-20 09:31:14,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ffe76c42/55fa1f8f79794d8bb7cb0e84a863b87f [2022-03-20 09:31:14,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 09:31:14,312 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 09:31:14,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 09:31:14,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 09:31:14,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 09:31:14,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@185a0792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14, skipping insertion in model container [2022-03-20 09:31:14,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 09:31:14,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 09:31:14,445 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/cohencu-ll_valuebound2.c[588,601] [2022-03-20 09:31:14,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:31:14,484 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 09:31:14,495 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/cohencu-ll_valuebound2.c[588,601] [2022-03-20 09:31:14,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 09:31:14,509 INFO L208 MainTranslator]: Completed translation [2022-03-20 09:31:14,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14 WrapperNode [2022-03-20 09:31:14,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 09:31:14,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 09:31:14,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 09:31:14,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 09:31:14,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 09:31:14,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 09:31:14,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 09:31:14,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 09:31:14,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 09:31:14,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:14,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 09:31:14,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 09:31:14,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 09:31:14,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 09:31:14,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 09:31:14,644 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 09:31:14,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 09:31:14,644 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 09:31:14,645 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 09:31:14,645 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 09:31:14,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 09:31:14,694 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 09:31:14,697 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 09:31:14,806 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 09:31:14,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 09:31:14,811 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 09:31:14,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:31:14 BoogieIcfgContainer [2022-03-20 09:31:14,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 09:31:14,816 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 09:31:14,816 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 09:31:14,817 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 09:31:14,820 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:31:14" (1/1) ... [2022-03-20 09:31:14,821 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 09:31:14,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:31:14 BasicIcfg [2022-03-20 09:31:14,840 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 09:31:14,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 09:31:14,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 09:31:14,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 09:31:14,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:31:14" (1/4) ... [2022-03-20 09:31:14,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fedfac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:31:14, skipping insertion in model container [2022-03-20 09:31:14,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:31:14" (2/4) ... [2022-03-20 09:31:14,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fedfac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:31:14, skipping insertion in model container [2022-03-20 09:31:14,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:31:14" (3/4) ... [2022-03-20 09:31:14,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fedfac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:31:14, skipping insertion in model container [2022-03-20 09:31:14,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 09:31:14" (4/4) ... [2022-03-20 09:31:14,849 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound2.cqvasr [2022-03-20 09:31:14,852 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 09:31:14,853 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 09:31:14,883 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 09:31:14,888 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 09:31:14,888 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 09:31:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 09:31:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 09:31:14,904 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:14,904 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:14,904 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1231486971, now seen corresponding path program 1 times [2022-03-20 09:31:14,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:14,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517693047] [2022-03-20 09:31:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:14,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:15,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:31:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:15,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:31:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:31:15,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:15,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517693047] [2022-03-20 09:31:15,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517693047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:31:15,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:31:15,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 09:31:15,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005774880] [2022-03-20 09:31:15,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:31:15,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 09:31:15,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:15,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 09:31:15,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:31:15,060 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:31:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:15,137 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-03-20 09:31:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 09:31:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 09:31:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:15,144 INFO L225 Difference]: With dead ends: 63 [2022-03-20 09:31:15,144 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 09:31:15,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 09:31:15,152 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:15,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:31:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 09:31:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 09:31:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 09:31:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-03-20 09:31:15,202 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-03-20 09:31:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:15,203 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-03-20 09:31:15,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:31:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-03-20 09:31:15,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 09:31:15,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:15,204 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:15,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 09:31:15,204 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:15,205 INFO L85 PathProgramCache]: Analyzing trace with hash -574090659, now seen corresponding path program 1 times [2022-03-20 09:31:15,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:15,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688279872] [2022-03-20 09:31:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:15,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:15,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 09:31:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:15,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 09:31:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:31:15,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688279872] [2022-03-20 09:31:15,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688279872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:31:15,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:31:15,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 09:31:15,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219389143] [2022-03-20 09:31:15,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:31:15,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 09:31:15,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 09:31:15,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:31:15,359 INFO L87 Difference]: Start difference. First operand 31 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:31:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:15,570 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-03-20 09:31:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:31:15,571 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), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-03-20 09:31:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:15,572 INFO L225 Difference]: With dead ends: 37 [2022-03-20 09:31:15,572 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 09:31:15,572 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:31:15,573 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:15,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:31:15,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 09:31:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 09:31:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 09:31:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 09:31:15,582 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-03-20 09:31:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:15,583 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 09:31:15,583 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 09:31:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 09:31:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 09:31:15,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:15,586 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:15,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 09:31:15,587 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:15,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:15,588 INFO L85 PathProgramCache]: Analyzing trace with hash 344526146, now seen corresponding path program 1 times [2022-03-20 09:31:15,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:15,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561733564] [2022-03-20 09:31:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:15,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:15,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:15,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332606998] [2022-03-20 09:31:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:15,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:15,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:15,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:15,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 09:31:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:15,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:31:15,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 09:31:15,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:31:15,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561733564] [2022-03-20 09:31:15,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332606998] [2022-03-20 09:31:15,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332606998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:31:15,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:31:15,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:31:15,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438883005] [2022-03-20 09:31:15,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:31:15,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:31:15,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:31:15,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:31:15,789 INFO L87 Difference]: Start difference. First operand 35 states and 44 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, (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) [2022-03-20 09:31:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:15,846 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-03-20 09:31:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:31:15,850 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, (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 [2022-03-20 09:31:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:15,851 INFO L225 Difference]: With dead ends: 54 [2022-03-20 09:31:15,851 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 09:31:15,851 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 [2022-03-20 09:31:15,852 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:15,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:31:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 09:31:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-20 09:31:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 09:31:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-03-20 09:31:15,874 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-03-20 09:31:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:15,874 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-03-20 09:31:15,874 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, (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) [2022-03-20 09:31:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-03-20 09:31:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 09:31:15,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:15,875 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:15,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:16,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:16,082 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash 942277242, now seen corresponding path program 1 times [2022-03-20 09:31:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:16,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410561565] [2022-03-20 09:31:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:16,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:16,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:16,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473736643] [2022-03-20 09:31:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:16,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:16,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:16,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:16,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 09:31:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:16,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 09:31:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 09:31:16,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:31:16,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410561565] [2022-03-20 09:31:16,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473736643] [2022-03-20 09:31:16,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473736643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:31:16,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:31:16,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:31:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623714112] [2022-03-20 09:31:16,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:31:16,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:31:16,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:31:16,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:31:16,217 INFO L87 Difference]: Start difference. First operand 42 states and 52 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) [2022-03-20 09:31:16,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:16,272 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-03-20 09:31:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:31:16,272 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 27 [2022-03-20 09:31:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:16,277 INFO L225 Difference]: With dead ends: 58 [2022-03-20 09:31:16,277 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 09:31:16,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:31:16,281 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:16,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 09:31:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 09:31:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-20 09:31:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 09:31:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-03-20 09:31:16,297 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-03-20 09:31:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:16,297 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-03-20 09:31:16,297 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) [2022-03-20 09:31:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-03-20 09:31:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 09:31:16,306 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:16,306 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, 1, 1] [2022-03-20 09:31:16,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:16,523 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,SelfDestructingSolverStorable3 [2022-03-20 09:31:16,526 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash -881201762, now seen corresponding path program 1 times [2022-03-20 09:31:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304767583] [2022-03-20 09:31:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:16,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:16,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:16,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809558734] [2022-03-20 09:31:16,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:16,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:16,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:16,548 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:16,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 09:31:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 09:31:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:16,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 09:31:16,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 09:31:16,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:16,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304767583] [2022-03-20 09:31:16,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:16,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809558734] [2022-03-20 09:31:16,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809558734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 09:31:16,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 09:31:16,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 09:31:16,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843712367] [2022-03-20 09:31:16,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 09:31:16,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 09:31:16,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:16,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 09:31:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 09:31:16,695 INFO L87 Difference]: Start difference. First operand 52 states and 67 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:31:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:16,772 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-03-20 09:31:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 09:31:16,772 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 09:31:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:16,774 INFO L225 Difference]: With dead ends: 66 [2022-03-20 09:31:16,774 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 09:31:16,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 09:31:16,775 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:16,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:31:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 09:31:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 09:31:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 09:31:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-20 09:31:16,799 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-03-20 09:31:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:16,800 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-20 09:31:16,800 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 09:31:16,800 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-20 09:31:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 09:31:16,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:16,802 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:16,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:17,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:17,020 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 72164327, now seen corresponding path program 1 times [2022-03-20 09:31:17,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381724128] [2022-03-20 09:31:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:17,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:17,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:17,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557557613] [2022-03-20 09:31:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:17,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:17,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:17,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:17,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 09:31:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 09:31:17,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 09:31:17,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 09:31:17,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381724128] [2022-03-20 09:31:17,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557557613] [2022-03-20 09:31:17,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557557613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:31:17,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:31:17,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 09:31:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76980373] [2022-03-20 09:31:17,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:17,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:31:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:31:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:31:17,342 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 09:31:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:17,607 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2022-03-20 09:31:17,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:31:17,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-03-20 09:31:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:17,608 INFO L225 Difference]: With dead ends: 77 [2022-03-20 09:31:17,608 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 09:31:17,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:31:17,609 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:17,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 237 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:31:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 09:31:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-03-20 09:31:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 09:31:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-03-20 09:31:17,619 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 49 [2022-03-20 09:31:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:17,619 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-03-20 09:31:17,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 09:31:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-03-20 09:31:17,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 09:31:17,620 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:17,620 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:17,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:17,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:17,842 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 655575797, now seen corresponding path program 2 times [2022-03-20 09:31:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:17,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052561224] [2022-03-20 09:31:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:17,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:17,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:17,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991628369] [2022-03-20 09:31:17,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:31:17,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:17,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:17,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 09:31:17,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:31:17,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:31:17,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 09:31:17,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 09:31:18,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 09:31:18,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:18,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052561224] [2022-03-20 09:31:18,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:18,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991628369] [2022-03-20 09:31:18,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991628369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:31:18,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:31:18,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 09:31:18,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504320744] [2022-03-20 09:31:18,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:18,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:31:18,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:31:18,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:31:18,144 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 09:31:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:18,232 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-03-20 09:31:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 09:31:18,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 54 [2022-03-20 09:31:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:18,234 INFO L225 Difference]: With dead ends: 81 [2022-03-20 09:31:18,234 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 09:31:18,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 09:31:18,234 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:18,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 239 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:31:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 09:31:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-03-20 09:31:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 09:31:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-03-20 09:31:18,245 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 54 [2022-03-20 09:31:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:18,245 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-03-20 09:31:18,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 09:31:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-03-20 09:31:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 09:31:18,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:18,246 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:18,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:18,462 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:18,462 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:18,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1963047427, now seen corresponding path program 3 times [2022-03-20 09:31:18,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:18,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321612446] [2022-03-20 09:31:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:18,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325416534] [2022-03-20 09:31:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:31:18,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:18,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:18,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 09:31:18,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 09:31:18,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:31:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 09:31:18,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 09:31:18,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-20 09:31:19,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:19,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321612446] [2022-03-20 09:31:19,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:19,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325416534] [2022-03-20 09:31:19,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325416534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:31:19,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:31:19,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 09:31:19,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835393093] [2022-03-20 09:31:19,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:19,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:31:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:31:19,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 09:31:19,021 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 09:31:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:19,331 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2022-03-20 09:31:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:31:19,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 59 [2022-03-20 09:31:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:19,332 INFO L225 Difference]: With dead ends: 93 [2022-03-20 09:31:19,332 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 09:31:19,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:31:19,333 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:19,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 183 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:31:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 09:31:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-03-20 09:31:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 48 states have internal predecessors, (48), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 09:31:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-03-20 09:31:19,342 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 59 [2022-03-20 09:31:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:19,342 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-03-20 09:31:19,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 09:31:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-03-20 09:31:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 09:31:19,343 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:19,344 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:19,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:19,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:19,555 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1897273453, now seen corresponding path program 1 times [2022-03-20 09:31:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:19,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227090869] [2022-03-20 09:31:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:19,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:19,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:19,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325799552] [2022-03-20 09:31:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:19,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:19,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:19,600 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:19,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 09:31:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 09:31:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-20 09:31:19,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:20,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227090869] [2022-03-20 09:31:20,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:20,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325799552] [2022-03-20 09:31:20,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325799552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:31:20,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:31:20,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 09:31:20,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891647670] [2022-03-20 09:31:20,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:20,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 09:31:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 09:31:20,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:31:20,058 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 09:31:20,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:20,138 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2022-03-20 09:31:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 09:31:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-03-20 09:31:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:20,139 INFO L225 Difference]: With dead ends: 95 [2022-03-20 09:31:20,139 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 09:31:20,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-20 09:31:20,140 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:20,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:31:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 09:31:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-03-20 09:31:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 55 states have internal predecessors, (56), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 09:31:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-03-20 09:31:20,154 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 75 [2022-03-20 09:31:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:20,154 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-03-20 09:31:20,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 09:31:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-03-20 09:31:20,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 09:31:20,155 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:20,156 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:20,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:20,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:20,373 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:20,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash -994112719, now seen corresponding path program 1 times [2022-03-20 09:31:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:20,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378320535] [2022-03-20 09:31:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:20,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:20,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:20,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346084741] [2022-03-20 09:31:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:20,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:20,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:20,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:20,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 09:31:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 09:31:20,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 09:31:20,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 79 proven. 12 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 09:31:20,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:31,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:31,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378320535] [2022-03-20 09:31:31,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:31,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346084741] [2022-03-20 09:31:31,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346084741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:31:31,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:31:31,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 09:31:31,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69114822] [2022-03-20 09:31:31,575 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:31,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 09:31:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 09:31:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-20 09:31:31,576 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 09:31:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:32,585 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2022-03-20 09:31:32,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 09:31:32,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 80 [2022-03-20 09:31:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:32,586 INFO L225 Difference]: With dead ends: 103 [2022-03-20 09:31:32,586 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 09:31:32,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-20 09:31:32,587 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:32,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 252 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:31:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 09:31:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-20 09:31:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 21 states have call successors, (21), 16 states have call predecessors, (21), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 09:31:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-03-20 09:31:32,599 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 80 [2022-03-20 09:31:32,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:32,599 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-03-20 09:31:32,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-20 09:31:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-03-20 09:31:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 09:31:32,602 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:32,602 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:32,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:32,802 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,SelfDestructingSolverStorable9 [2022-03-20 09:31:32,805 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1391751782, now seen corresponding path program 4 times [2022-03-20 09:31:32,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:32,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298211043] [2022-03-20 09:31:32,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:32,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:32,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:32,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902023439] [2022-03-20 09:31:32,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 09:31:32,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:32,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:32,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:32,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 09:31:32,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 09:31:32,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:31:32,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 09:31:32,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 09:31:33,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-20 09:31:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:33,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298211043] [2022-03-20 09:31:33,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:33,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902023439] [2022-03-20 09:31:33,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902023439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:31:33,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:31:33,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-20 09:31:33,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250763140] [2022-03-20 09:31:33,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:33,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 09:31:33,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 09:31:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 09:31:33,261 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-03-20 09:31:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:33,621 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2022-03-20 09:31:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 09:31:33,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 81 [2022-03-20 09:31:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:33,624 INFO L225 Difference]: With dead ends: 106 [2022-03-20 09:31:33,624 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 09:31:33,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 09:31:33,625 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:33,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 226 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:31:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 09:31:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-03-20 09:31:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 09:31:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-03-20 09:31:33,641 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 81 [2022-03-20 09:31:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:33,642 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-03-20 09:31:33,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-03-20 09:31:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-03-20 09:31:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 09:31:33,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:33,645 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 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] [2022-03-20 09:31:33,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:33,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:33,877 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash 574631438, now seen corresponding path program 2 times [2022-03-20 09:31:33,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:33,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404491304] [2022-03-20 09:31:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:33,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:33,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:33,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827861723] [2022-03-20 09:31:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:31:33,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:33,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:33,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:33,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 09:31:33,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:31:33,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:31:33,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 09:31:33,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-20 09:31:34,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:34,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:34,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404491304] [2022-03-20 09:31:34,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:34,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827861723] [2022-03-20 09:31:34,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827861723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:31:34,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:31:34,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 09:31:34,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424569989] [2022-03-20 09:31:34,462 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:34,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:31:34,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:34,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:31:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:31:34,463 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 09:31:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:34,577 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2022-03-20 09:31:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 09:31:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-03-20 09:31:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:34,579 INFO L225 Difference]: With dead ends: 118 [2022-03-20 09:31:34,579 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 09:31:34,579 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 09:31:34,579 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:34,580 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 290 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:31:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 09:31:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-03-20 09:31:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.044776119402985) internal successors, (70), 69 states have internal predecessors, (70), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 09:31:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-03-20 09:31:34,591 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 102 [2022-03-20 09:31:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:34,591 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-03-20 09:31:34,592 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 09:31:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-03-20 09:31:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 09:31:34,593 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:34,593 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 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, 1] [2022-03-20 09:31:34,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:34,800 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,SelfDestructingSolverStorable11 [2022-03-20 09:31:34,800 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 474519958, now seen corresponding path program 2 times [2022-03-20 09:31:34,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:34,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129422250] [2022-03-20 09:31:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:34,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:34,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:34,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004042537] [2022-03-20 09:31:34,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 09:31:34,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:34,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:34,813 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:34,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 09:31:34,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 09:31:34,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:31:34,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 09:31:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-20 09:31:35,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:35,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:35,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129422250] [2022-03-20 09:31:35,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:35,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004042537] [2022-03-20 09:31:35,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004042537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 09:31:35,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 09:31:35,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-20 09:31:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524126898] [2022-03-20 09:31:35,394 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:35,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 09:31:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 09:31:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 09:31:35,395 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 09:31:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:35,518 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-03-20 09:31:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 09:31:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-03-20 09:31:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:35,519 INFO L225 Difference]: With dead ends: 126 [2022-03-20 09:31:35,519 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 09:31:35,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 09:31:35,520 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:35,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 299 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 09:31:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 09:31:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-20 09:31:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 26 states have call successors, (26), 20 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 09:31:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2022-03-20 09:31:35,530 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 107 [2022-03-20 09:31:35,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:35,530 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2022-03-20 09:31:35,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 09:31:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2022-03-20 09:31:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 09:31:35,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:35,531 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:35,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:35,747 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,SelfDestructingSolverStorable12 [2022-03-20 09:31:35,748 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash 94155443, now seen corresponding path program 3 times [2022-03-20 09:31:35,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:35,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084957100] [2022-03-20 09:31:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:35,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:35,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:35,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453467418] [2022-03-20 09:31:35,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:31:35,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:35,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:35,761 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:35,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 09:31:35,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 09:31:35,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:31:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 09:31:35,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-03-20 09:31:36,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-03-20 09:31:37,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084957100] [2022-03-20 09:31:37,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453467418] [2022-03-20 09:31:37,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453467418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:31:37,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:31:37,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-20 09:31:37,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163773160] [2022-03-20 09:31:37,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:37,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 09:31:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 09:31:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-03-20 09:31:37,494 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) [2022-03-20 09:31:37,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:37,932 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2022-03-20 09:31:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 09:31:37,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) Word has length 129 [2022-03-20 09:31:37,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:37,933 INFO L225 Difference]: With dead ends: 119 [2022-03-20 09:31:37,933 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 09:31:37,934 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-03-20 09:31:37,934 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:37,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 169 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 09:31:37,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 09:31:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 09:31:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 26 states have call successors, (26), 21 states have call predecessors, (26), 19 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 09:31:37,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2022-03-20 09:31:37,945 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 129 [2022-03-20 09:31:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:37,945 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2022-03-20 09:31:37,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (25), 6 states have call predecessors, (25), 9 states have call successors, (25) [2022-03-20 09:31:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2022-03-20 09:31:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 09:31:37,946 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 09:31:37,946 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 09:31:37,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:38,146 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,SelfDestructingSolverStorable13 [2022-03-20 09:31:38,147 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 09:31:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 09:31:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1269707793, now seen corresponding path program 3 times [2022-03-20 09:31:38,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 09:31:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499497847] [2022-03-20 09:31:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 09:31:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 09:31:38,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 09:31:38,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799754438] [2022-03-20 09:31:38,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 09:31:38,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 09:31:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 09:31:38,168 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 09:31:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 09:31:38,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 09:31:38,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 09:31:38,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 09:31:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 09:31:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-20 09:31:40,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 09:31:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-03-20 09:31:41,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 09:31:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499497847] [2022-03-20 09:31:41,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 09:31:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799754438] [2022-03-20 09:31:41,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799754438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 09:31:41,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 09:31:41,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-20 09:31:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532778868] [2022-03-20 09:31:41,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 09:31:41,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 09:31:41,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 09:31:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 09:31:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-20 09:31:41,267 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-20 09:31:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 09:31:41,898 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2022-03-20 09:31:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 09:31:41,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) Word has length 134 [2022-03-20 09:31:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 09:31:41,899 INFO L225 Difference]: With dead ends: 115 [2022-03-20 09:31:41,899 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 09:31:41,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2022-03-20 09:31:41,900 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 09:31:41,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 173 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 09:31:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 09:31:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 09:31:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 09:31:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 09:31:41,901 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 134 [2022-03-20 09:31:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 09:31:41,901 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 09:31:41,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 8 states have call predecessors, (34), 9 states have call successors, (34) [2022-03-20 09:31:41,901 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 09:31:41,901 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 09:31:41,903 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 09:31:41,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 09:31:42,108 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,SelfDestructingSolverStorable14 [2022-03-20 09:31:42,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 09:31:48,776 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-20 09:31:48,776 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:31:48,776 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:31:48,776 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 09:31:48,776 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 09:31:48,776 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 09:31:48,776 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 09:31:48,776 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-03-20 09:31:48,776 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-20 09:31:48,776 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-20 09:31:48,777 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-20 09:31:48,777 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 56) the Hoare annotation is: true [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* (- 1) main_~a~0))) (or (and (< main_~a~0 65536) (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ .cse0 32767) 65536))) (and (<= 0 (+ 65536 main_~a~0)) (< (div (+ main_~a~0 32768) (- 65536)) (+ (div (+ (- 1) .cse0) 65536) 1)) (< main_~a~0 0)))) [2022-03-20 09:31:48,777 INFO L882 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (<= .cse1 (+ main_~a~0 1)) (< main_~a~0 .cse1))))) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) .cse0 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (<= .cse1 (+ main_~a~0 1)) (< main_~a~0 .cse1))))) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (= (+ (* main_~z~0 main_~z~0) 6 (* main_~z~0 main_~y~0)) (+ (* main_~x~0 18) (* main_~z~0 4) (* main_~y~0 24))) .cse0 (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2) (<= .cse1 (+ main_~a~0 1)) (< main_~a~0 .cse1))) (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)))) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (<= main_~a~0 2) (= (* main_~n~0 main_~n~0 main_~n~0) main_~x~0)) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= (+ (* main_~z~0 main_~z~0) 6 (* main_~z~0 main_~y~0)) (+ (* main_~x~0 18) (* main_~z~0 4) (* main_~y~0 24))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2)) [2022-03-20 09:31:48,777 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-20 09:31:48,778 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0) (<= main_~a~0 2)) [2022-03-20 09:31:48,778 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (= (+ (* main_~x~0 18) (* main_~y~0 12) 6) (+ (* main_~z~0 2) (* main_~z~0 main_~y~0))) (= (+ (* main_~n~0 6) 6) main_~z~0) (= (+ (* 3 (* main_~n~0 main_~n~0)) (* main_~n~0 3) 1) main_~y~0)) [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 56) no Hoare annotation was computed. [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 56) no Hoare annotation was computed. [2022-03-20 09:31:48,778 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-03-20 09:31:48,778 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-03-20 09:31:48,780 INFO L719 BasicCegarLoop]: Path program histogram: [4, 3, 3, 1, 1, 1, 1, 1] [2022-03-20 09:31:48,781 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 09:31:48,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:31:48 BasicIcfg [2022-03-20 09:31:48,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 09:31:48,793 INFO L158 Benchmark]: Toolchain (without parser) took 34481.10ms. Allocated memory was 200.3MB in the beginning and 250.6MB in the end (delta: 50.3MB). Free memory was 149.9MB in the beginning and 108.3MB in the end (delta: 41.6MB). Peak memory consumption was 121.5MB. Max. memory is 8.0GB. [2022-03-20 09:31:48,794 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory was 166.2MB in the beginning and 166.1MB in the end (delta: 83.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 09:31:48,794 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.84ms. Allocated memory is still 200.3MB. Free memory was 149.6MB in the beginning and 175.5MB in the end (delta: -25.8MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. [2022-03-20 09:31:48,794 INFO L158 Benchmark]: Boogie Preprocessor took 19.42ms. Allocated memory is still 200.3MB. Free memory was 175.5MB in the beginning and 174.2MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 09:31:48,796 INFO L158 Benchmark]: RCFGBuilder took 282.06ms. Allocated memory is still 200.3MB. Free memory was 173.9MB in the beginning and 163.2MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 09:31:48,796 INFO L158 Benchmark]: IcfgTransformer took 23.60ms. Allocated memory is still 200.3MB. Free memory was 163.2MB in the beginning and 161.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 09:31:48,796 INFO L158 Benchmark]: TraceAbstraction took 33951.98ms. Allocated memory was 200.3MB in the beginning and 250.6MB in the end (delta: 50.3MB). Free memory was 161.4MB in the beginning and 108.3MB in the end (delta: 53.0MB). Peak memory consumption was 132.7MB. Max. memory is 8.0GB. [2022-03-20 09:31:48,800 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 200.3MB. Free memory was 166.2MB in the beginning and 166.1MB in the end (delta: 83.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.84ms. Allocated memory is still 200.3MB. Free memory was 149.6MB in the beginning and 175.5MB in the end (delta: -25.8MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.42ms. Allocated memory is still 200.3MB. Free memory was 175.5MB in the beginning and 174.2MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 282.06ms. Allocated memory is still 200.3MB. Free memory was 173.9MB in the beginning and 163.2MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 23.60ms. Allocated memory is still 200.3MB. Free memory was 163.2MB in the beginning and 161.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 33951.98ms. Allocated memory was 200.3MB in the beginning and 250.6MB in the end (delta: 50.3MB). Free memory was 161.4MB in the beginning and 108.3MB in the end (delta: 53.0MB). Peak memory consumption was 132.7MB. 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 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 33.9s, OverallIterations: 15, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 239 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 175 mSDsluCounter, 2854 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2252 mSDsCounter, 380 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1646 IncrementalHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 380 mSolverCounterUnsat, 602 mSDtfsCounter, 1646 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1659 GetRequests, 1495 SyntacticMatches, 11 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 9.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=12, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 54 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 70 PreInvPairs, 115 NumberOfFragments, 640 HoareAnnotationTreeSize, 70 FomulaSimplifications, 2458 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 19 FomulaSimplificationsInter, 28774 FormulaSimplificationTreeSizeReductionInter, 6.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 19.1s InterpolantComputationTime, 985 NumberOfCodeBlocks, 797 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1470 ConstructedInterpolants, 0 QuantifiedInterpolants, 5631 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1925 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 6543/6798 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((n <= a + 1 && n * 6 + 6 == z) && 0 <= a) && 3 * (n * n) + n * 3 + 1 == y) && a <= 2) && n * n * n == x RESULT: Ultimate proved your program to be correct! [2022-03-20 09:31:48,817 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...